STH Infection Research Articles

Global burden of soil-transmitted helminth infections, 1990–2021

BackgroundSoil-transmitted helminth (STH) infections can cause a significant disease burden. It is estimated that 1.5 billion people worldwide are infected with STHs, primarily in tropical and subtropical regions. This study aimed to assess the distribution of the global burden and trend of STH infections from 1990 to 2021.MethodsWe retrieved data from the Global Burden of Diseases, Injuries, and Risk Factors Study 2021 on the age-standardized rates (ASRs) of prevalence and disability-adjusted life-years (DALYs) of STH infections for all age groups in 204 countries and territories from 1990 to 2021. The ASRs of prevalence and DALYs by age, gender, and socio-demographic index (SDI) were calculated to quantify the spatial distribution and temporal trend. Spearman correlation analysis was used to examine the relationship between ASR and SDI.ResultsIn 2021, there were an estimated 642.72 million cases and 1.38 million DALYs caused by STH infections worldwide. The age-standardized prevalence rate (ASPR) of STH infections was 8429.89 [95% uncertainty interval (UI): 7697.23, 9362.18 ] per 100,000 population globally. The ASPR of STH infections varied across 21 geographic regions in 2021, being mainly prevalent in most African and Latin American locations. The prevalence was higher in the groups of 5–19 years, especially the group of 5–9 years with the ASPR of 16,263 (95% UI: 14,877.06, 18,003.49) and ASR of DALYs of 40.69 (95% UI: 25.98, 60.91) per 100,000. The ASPR of STH infections showed an obvious decreasing trend worldwide (estimated annual percent change = − 4.03, 95% confidence interval: − 4.13, − 3.93) with variations in different species infections during the study years. At the regional level, the ASR of STH infections prevalence (r = − 0.8807, P < 0.0001) and DALYs (r = − 0.9069, P < 0.0001) were negatively correlated with SDI .ConclusionsSTH infections remain a public health problem in 2021, particularly in regions such as the middle parts of Africa and Americas, and in the 5–19 age populations. The reduction in the rate of prevalence and the loss of DALYs are negatively correlated with the increase in SDI. Enhancing political commitment, providing accurate preventive chemotherapy, and advancing techniques for surveillance and mapping systems are essential to achieve the target of ending STH infections as a public health problem by 2030.Graphical

Evaluation of a novel biplex rapid diagnostic test for antibody responses to Loa loa and Onchocerca volvulus infections.

Endemic to Central Africa, loiasis, caused by the vector-borne worm Loa loa, affects approximately 10 million individuals. Clinical manifestations include transient angioedema (Calabar swellings), migration of the adult worm under the eye conjunctiva (eye worm) and less specific general symptoms. Loiasis presents a significant public health challenge because L. loa-infected individuals can develop serious adverse events after taking ivermectin, the drug used to combat onchocerciasis. In this context, alternative interventions and rigorous diagnostic approaches are needed. Diagnosing loiasis is challenging because its main clinical manifestations are sporadic and non-specific. The definitive diagnosis relies on identifying adult worms migrating beneath the conjunctiva, or microfilariae (pre-larvae) in blood smears. However, "occult loiasis" (infection without blood microfilariae) is frequent. Serological rapid antibody diagnostic tests (ARTs) can provide an alternative diagnostic method. We compared a novel ART simultaneously targeting onchocerciasis (IgG4 to Ov-16 and OvOC3261, test line 1) and loiasis (IgG4 to L1-SXP-1, test line 2), called IgG4-SXP-1 biplex test) to the already established Loa-ART (all IgG isotypes to Ll-SXP-1, called pan-IgG-SXP-1 test). Blood samples underwent both ARTs, read qualitatively and semi-quantitatively. Additionally, blood smears, skin snips, Kato-Katz method for soil-transmitted helminthiases identification and eosinophilia measurements were performed. Questionnaires gathered demographic details and loiasis-related signs. ARTs performance was compared using specific loiasis-related signs and microfilaremia as references. Discordances between the two ARTs were investigated using logistic regression models. Out of 971 participants, 35.4% had L. loa microfilaremia, 71.9% had already experienced loiasis-related signs, 85.1% were positive in the pan-IgG-SXP-1 test and 79.4% were positive in the IgG4-SXP-1 biplex test. In the microfilariae-positive population, the sensitivity of the rapid tests was 87.4% for the pan-IgG-SXP-1 test and 88.6% for the prototype IgG4-SXP-1 biplex test. Sensitivity was similar for both ARTs when using eye worm or Calabar swelling as references, but diagnostic performance varied based on microfilaremia levels and occult loiasis. Overall, IgG4-SXP-1 biplex test demonstrated a sensitivity of 84.1% and specificity of 47.6% for loiasis compared to the pan-IgG-SXP-1 test, leading to a Kappa coefficient estimated at 0.27 ± 0.03 for the qualitative results of the 2 ARTs. In the group that tested positive with the Pan-IgG test but negative with the IgG4-specific test, there was a lower prevalence of STH infection (p = 0.008) and elevated eosinophilia (p<0.001) compared to the general tested population. The sensitivity of each test was good (84-85%) but the diagnostic agreement between the two ARTs was poor, suggesting that IgG and IgG4 antibody responses should be interpreted differently. The assessment of the innovative rapid diagnostic IgG4-SXP-1 biplex test, designed for onchocerciasis and loiasis, shows encouraging sensitivity but underlines the necessity for further in vitro assessment.

Prevalence and risk factors of soil transmitted helminths among vegetable farmers of Akaki river bank, Addis Ababa, Ethiopia

BackgroundIn Ethiopia, 79 million people live in soil transmitted helminths endemic areas. The Ethiopia established a National goal to eradicate STH transmission by 2025. To meet that goal, it is imperative that data is acquired on community helminth infection risk. This study examined the prevalence of STH and risk factors for infection in vegetable farmers working on Akaki River Bank, Addis Ababa, Ethiopia.MethodsA cross-sectional study was conducted between November 7, 2022, and June 2023. A stratified random sampling was used to select farming households. Two hundred and sixteen farmers were enrolled in the study. Data on socio-demographic, WASH, wastewater irrigation related factors were collected by trained data collectors using a structured questionnaire. Kato-Katz concentration was utilized to detect STH. The data were entered using EpiData 3.1 and analyzed with Stata 14.0, using p-values less than 0.05 to identify significant factors. Logistic regression was used to identify independent risk factors for infection.ResultsThe prevalence of STH was 22.2% (95% CI = 13.6-27.9%), with Ascaris lumbricoides being the most common (11.1%), followed by hookworm (7.4%), and Trichuris trichiura (3.7%). Low income levels (AOR = 1.85, 95% CI = 1.25–5.99), lack of handwashing before eating (AOR = 2.25, 95% CI = 1.58 − 11.3), absence of fingernails cleanliness (AOR = 1.97, 95% CI = 1.74–39.5), not wearing shoes at work (AOR = 3.4, 95% CI = 2.98–82.2), touching the face with dirty hands (AOR = 2.9, 95% CI = 0.68–28.2), washing vegetables with irrigation wastewater (AOR = 2.1, 95% CI = 1.95–45.2), and not wearing protective clothing during farming activities (AOR = 2.99, 95% CI = 1.58 − 22.4) were the significant risk factors for infection with STH.ConclusionOf the farming communities examined in this study, one of the five was found to be infected with soil transmitted helminth. This research has shown clear risk factors for STH infection including: lack of personal hygiene practices, insufficient sanitation access, and limited use of protective equipment. To achieve the national goal, there is a need for farming communities to understand preventative risks of infection, improve WASH (Water access, sanitation and hygine) practices, WASH access, protective equipment, and health education.

Efficacy and Safety of Mebendazole in the Treatment of Intestinal Helminth Infections

Mebendazole was introduced in 1971 and is not soluble in water or other organic solvents, it is also not absorbed from the intestinal tract in a high-fat context. Both albendazole and mebendazole have a low rate of absorption in the human intestine. These drugs primarily target parasites in the stomach's lumen, and their metabolites are effective against parasites in the stomach's muscles and tissues. For instance, albendazole sulfoxide is the primary metabolite that possesses anthelmintic properties. Metabolites of mebendazole are expelled in the urine. Both drugs negatively affect the function of microtubules in parasites and mammalian cells, this results in the depletion of the parasites' glycogen stores. Current helminth control strategies involve periodic deworming with albendazole or mebendazole. However, concerns about drug resistance and the persistence of high prevalence rates suggest the need for additional strategies, such as improved water, sanitation, and hygiene, and optimized treatment regimens. Albendazole and mebendazole are highly effective against Ascaris lumbricoides, with a single dose of albendazole showing a cure rate of 96% and mebendazole showing a cure rate of 92.3%. Mebendazole's efficacy against hookworms varies, but a recommended dosing regimen improves effectiveness. Mebendazole's effectiveness against Trichuris trichiura depends on the dosing regimen. It is less effective against hymenolepiasis, where praziquantel is preferred. Mebendazole has also been used to treat Giardia lamblia infections. In summary, STH infections are a significant health issue, and albendazole and mebendazole are commonly used drugs for treatment. However, there is a need for additional strategies to address drug resistance and improve treatment efficacy. Mebendazole has potential side effects and should be used with caution, especially during pregnancy.

Knowledge, attitudes, and practices related to soil-transmitted helminth infections among residents of Bata district, Equatorial Guinea; a cross-sectional study

BackgroundSoil-transmitted helminth (STH) infection control remains a priority in endemic regions where local epidemiological data are needed for sustainable control strategies, particularly regarding population knowledge, attitudes, and practices (KAP). Our work assessed KAP toward STH infection and associated factors among residents of Bata district, Equatorial Guinea.MethodsA community-based cross-sectional study was conducted among 14 randomly selected communities in the Bata district. Eligible participants were interviewed face-to-face using a standardized questionnaire. Participants aged under 18 years were interviewed in the presence of their parents or legal guardians. For participants aged less than ten, a simplified version of the main questionnaire was developed focusing on children’s practices toward STH and was administered to their parents or legal guardians.ResultsA total of 399 participants were included in the present analysis. Among them, 58% responded to the main questionnaire. The mean (± SD) age of participants aged 10 and over was 37.5 (± 22.2) years, and 60% of them were females, while the mean (± SD) age of those aged less than ten was 5.0 (± 2.5) years. The respondents’ overall knowledge, attitudes, and practices to STH were rated as bad (33%), very good (77%), and good (55%), respectively. Knowledge was significantly associated with education level (p = 0.04) with the knowledge level lower for participants with no formal education than for those with secondary/university education (β = -0.56, 95% CI: -1.00 – -0.12, p = 0.01); Appropriate attitudes level was significantly associated with occupation (p = 0.02) and education levels (p = 0.049) with the appropriate attitude level lower for students than for farmers/fishers (β = -1.24, 95% CI: -2.17—-0.32, p = 0.01) and for primary-level participants than for those with secondary/university education (β = -0.68, 95% CI: -1.23—-0.13, p = 0.02); while appropriate practice level were significantly associated with age (p = 0.01), occupation (p = 0.01), and education (p = 0.02), with the appropriate practices level increasing with age (β = 0.03, 95% CI: 0.005 – 0.05, p = 0.01) and lower in participants with no formal education than in those with secondary/university education (β = -1.19, -2.05 – -0.32, p = 0.007).ConclusionThe present study revealed a lack of knowledge about STH in the study population, particularly regarding disease causes and transmission ways, highlighting the need for the implementation of integrated health education strategies, both at the community and school levels.

Soil-transmitted Helminth Infection and Perinatal Outcomes in Pregnant Women in Primary Care Settings in South India: A Cohort Study.

Soil-transmitted helminth infections (STHs) in pregnancy have been linked to maternal anemia, low birth weight, and adverse perinatal outcomes. STH includes Ascaris lumbricoides, hookworm, and Trichuris trichiura. However, conflicting evidence exists regarding these effects. Hence, we aimed to assess the association of STH infections with perinatal outcomes. A community-based cohort study was conducted among pregnant women in primary care settings in Puducherry, South India, during December 2019 to April 2021. Stool samples were collected for STH screening and confirmed using polymerase chain reaction. Information on perinatal outcomes and hemoglobin levels were extracted from case records. The association of pre-term birth, low birth weight, anemia, and miscarriages with STH infection was analyzed using the Chi-square test. Among the 650 women enrolled, 58 (8.9%) had one of the STH infections. At the time of recruitment, 336 (52.0%) women had anemia. Twenty-four women (3.7%) had miscarriages, 14 (2.2%) had pre-term birth, and 65 (10.4%) had low-birth-weight (LBW) babies. All 14 pre-term babies had LBW, and out of 65 LBW, 40 were in mothers with anemia. Incidence of LBW, pre-term deliveries, and anemia were higher in women with STH than in those without STH (LBW: 12.3% vs 10.2%, P = 0.62; pre-term: 3.5% vs 2.1%, P = 0.5; and anemia: 54.4% vs 51.85, P = 0.7). Though the incidence of anemia, LBW, and pre-term delivery was higher in women with STH infections compared to those without STH, we did not find any significant association between the presence of STH infections and perinatal outcomes.

Prevalence and Distribution of Geo-Helminths and Intestinal Protozoa Infections among School-Going Children in Nyeri County, Kenya

The goal of this study was to determine how common and widespread geo-helminths, STH, and intestinal protozoa infections are in the Mathira constituency of Nyeri County, Kenya. The study aimed to determine the prevalence of geohelminths and intestinal protozoa, as well as the distribution of STH and intestinal protozoa infections in school-going children. Cochran formulae guided the design of a cross-sectional study on a population of 174 children, yielding complete data for 164 of them. The social determinants of the health model guided this study. A structured questionnaire was applied to data collection to establish the demographic characteristics of the study participants in the identified three primary schools in the study site. They were examined for STH and protozoa infections by the quantitative Kato-Katz technique for STH and formal ether concentration techniques for intestinal protozoa infection. Statistical analysis was done using R Studio and the risk ratio. Findings showed that of the 56 samples examined in Kihuro primary school, 12 (21.4%) and 6 (10.7%) were positive for protozoan and STH infections. Similarly, 33% of the children in Gathuini primary school were found to be positive for protozoan infections, while 13% were infected with STH. In Gikumbo primary school, 20.4% of the children were infected with protozoan parasites, compared to 13% of STH infections. However, there was a variation in infection prevalence based on gender across the three selected sites. Children in Kihuro primary school were 0.12 times more at risk of STH infection compared to 0.3 times more at risk of protozoa infections. The intestinal protozoa infection was higher than that for the geohelminths infection in Gathuini primary school. Children in Gathuini primary school were 0.12 times more at risk of STH infection compared to 0.46 times more at risk of protozoa infections. Children in Gikumbo primary school were 0.1 times at risk of STH infection compared to 0.26 times at risk of protozoa infections, implying that they were more prone to protozoan infections than STH infections. The study concluded that the age and gender of students had no statistical significance. The study recommended that government institutions and non-governmental organizations should intervene and undertake adequate control measures against geo-helminth parasites by making sure there is access to safe water and improved sanitation in the area. Moreover, health education programs should be intensified in the area and beyond to raise awareness of geo-helminths and intestinal protozoa infection, means of transmission and control measures, and the improvement of hygiene practices for both children and parents.

Efficacy of Albendazole and Mebendazole Against Soil Transmitted Infections among Pre-School and School Age Children: A Systematic Review and Meta-Analysis

BackgroundSoil-transmitted helminthic (STH) infections are the leading cause of stunting among children. To lessen the burden, the World Health Organization (WHO) recommended a periodic deworming program through the use of single-dose therapy in the endemic regions. Therefore, the purpose of this study was to synthesize evidence about the efficacy of anthelminthic drugs against STH infections among preschool and school-age children.MethodsThe Preferred Reposting Items for Systematic Reviews and Meta-Analyses (PRISMA) criteria were followed in this study. Relevant electronic databases, including PubMed, Scopus, Embase, DOAJ, Science Direct, the WHO Clinical Trials.gov library, Google Scholar, and AJOL databases, were searched for relevant publications. Randomized controlled trials (RCTs) and non-randomized interventional studies focused on the efficacy of albendazole and mebendazole against STHs in children were included in the study. Review Manager was used to analyze the data. A random effects model was used to obtain the pooled estimated efficacy. To evaluate heterogeneity, the I2 test and Cochrane Q (χ2) were employed. The risk of publication bias was investigated using Egger’s test and the funnel plot. The protocol of this review was registered at the PROSPERO international prospective register of systematic reviews (CRD42023401196).ResultsOf the 69 publications selected for the systematic review, 66 with complete data were included in the meta-analysis. Single doses of albendazole and mebendazole have shown satisfactory efficacy [egg reduction rate (ERR)] against Ascaris lumbricoides [95.54% (95% CI: 88.75–102.34%) and 98.69% (95% CI: 97.68–99.65%), respectively. The effectiveness of these two drugs against Trichuris trichiura and hookworms was comparatively low (< 80% ERR), except for albendazole, which showed high ERRs [93.44% (95%CI: 92.39–94.49%)] against hookworms. The cure rate (CR) of albendazole against T. trichiura, A. lumbricoides, and hookworms were 50.8%, 91.3%, and 78.32%, respectively. Likewise, mebendazole showed CRs of 48.15%, 92.8%, and 49.32% against T. trichiura, A. lumbricoides, and hookworms, respectively. Subgroups such as studies conducted after 2000, diagnostic type (McMaster), and longer follow-up weeks significantly reduced the efficacy of the two drugs against T. trichura. While the combination of albendazole or mebendazole with other drugs and RCT showed significantly improved efficacy against T. trichura. The count of eggs per gram of stool (EPG) was identified as one of the variables that negatively and significantly influenced the efficacy of albendazole or mebendazole against A. lumbricoides.ConclusionDespite the wide range of ERRs and CR reported in the different articles included in this review, the pooled estimated efficacy of albendazole and mebendazole against STHs falls in the satisfactory category of WHO recommendations. Further evaluation of the combination of anthelminthic drugs as a preventive chemotherapy option and routine drug efficacy testing are necessary to prevent the emergence and widespread use of drug-resistant STHs.

Soil-transmitted helminthiasis among school-aged children in selected primary schools in southwest Nigeria: a cross-sectional study

This cross-sectional study was conducted to determine the prevalence and intensity of infection of soil-transmitted helminths among school-aged children in Ife Central and Ife East Local Government Areas, Osun State, Nigeria. Fresh stool samples were collected from 324 pupils, comprising 162 males and 162 females (aged 5-12 years). The preserved fecal samples were processed using a modified Kato-Katz technique. Data were analyzed using the Statistical Package for Social Sciences (SPSS) version 20. Of the 324 fecal samples examined, 79 (24.4%) tested positive for helminth eggs. The eggs were identified as Ascaris lumbricoides, with a prevalence of 22.2%, and hookworm; with a prevalence of 3.7%. Double infections were observed in 5 (1.5%) pupils. Private schools had a slightly higher prevalence (24.7%) than did public schools (24.1%). Sex-related prevalence was higher among males (25.9%) than females (22.8%), and no significant difference existed in the prevalence level between the sexes (p &gt; 0.05). This study concluded that STH infection remains a public health risk among children in the study area.

Prevalence of Malaria and Helminth Infections and Their Link to Knowledge on Preventive Strategies among Asymptomatic Pupils in Rural-urban Cameroon

Aim: The aim of our study was to investigate the prevalence of malaria and helminth infection among asymptomatic primary school children in rural and urban Yaoundé-Cameroon, to assess pupils’ knowledge about malaria and STH infection, and to evaluate the association between this knowledge and actual disease prevalence.&#x0D; Study Design: This study was a cross-sectional and was carried out between October 2019 and December 2019 in six primary schools in the Centre region of Cameroon.&#x0D; Methodology:Pupils in classes 3 to six were recruited for the study. Blood and stool samples were collected and analysed to determine pupils’ disease prevalence. Questionnaires following the KAP and health belief model frameworks were administered to evaluate pupils’ health literacy in malaria and helminths.&#x0D; Results: 457 pupils from rural and urban zones participated in this study. 245 (53.6 %) were female and 212 (46.4 %) were male. The prevalence of anaemia was higher in urban than rural zones. Total malaria prevalence was 17.7%. Malaria parasitaemia prevalence classified according to settings revealed rural zones at 28.6% and urban zones at 13.9%. STH infection showed a total prevalence of 4.8% and 7.9% and 3.7% in rural and urban zones respectively. The prevalence of co-infection was 1.2%. Health-literacy gaps in malaria and helminths were identified. Schooling in rural settings and being older were predictors for having a good knowledge of the diseases. However, having good knowledge was not significantly associated to actual malaria parasitaemia or STH prevalence.&#x0D; Conclusion: Insights from this study are essential for the implementation of successful, sustainable and targeted health-promotion strategies to improve the health and well-being of pupils.

Protocol for spatial prediction of soil transmitted helminth prevalence in the Western Pacific region using a meta-analytical approach

BackgroundSoil transmitted helminth (STH) infections are estimated to impact 24% of the world’s population and are responsible for chronic and debilitating morbidity. Disadvantaged communities are among the worst affected and are further marginalized as infection prevalence fuels the poverty cycle. Ambitious targets have been set to eliminate STH infections, but accurate epidemiological data will be required to inform appropriate interventions. This paper details the protocol for an analysis that aims to produce spatial prediction mapping of STH prevalence in the Western Pacific Region (WPR).MethodsThe protocol follows the Preferred Reporting Items for Systematic Review and Meta-Analysis Protocol (PRISMA-P) guidelines. The study design will combine the principles of systematic review, meta-analysis, and geospatial analysis. Systematic searches will be undertaken in PubMed, Scopus, ProQuest, Embase, and Web of Science for studies undertaken post 2000, to identify surveys that enable the prevalence of human STH infection within the WPR to be calculated. Covariate data for multivariable analysis will be obtained from publicly accessible sources. Survey data will be geolocated, and STH prevalence and covariates will be linked to produce a spatially referenced dataset for analysis. Bayesian model-based geostatistics will be used to generate spatially continuous estimates of STH prevalence mapped to a resolution of 1 km2. A separate geospatial model will be constructed for each STH species. Predictions of prevalence will be made for unsampled locations and maps will be overlaid for each STH species to obtain co-endemicity maps.DiscussionThis protocol facilitates study replication and may be applied to other infectious diseases or alternate geographies. Results of the subsequent analysis will identify geographies with high STH prevalence’s and can be used to inform resource allocation in combating this neglected tropical disease.Trial registrationOpen Science Framework: osf.io/qmxcj.

Epidemiology of soil-transmitted helminth infections and the differential effect of treatment on the distribution of helminth species in rural areas of Gabon

BackgroundSoil-transmitted helminth (STH) infections are a public health concern in endemic areas. For efficient control, the epidemiology of the disease needs to be monitored. This report assesses the prevalence, incidence, post-treatment infection (PTI) rate, and risk factors for STH infections in two rural areas of Gabon.MethodIn this longitudinal and prospective study, participants aged six to 30 years from the vicinity of Lambaréné and selected households using a simple randomization process were included and followed in two consecutive periods of six and nine months. Stool samples were obtained at the beginning and the end of each follow-up phase (FUP). The Kato-Katz technique was used for the detection of STH eggs, while the Harada-Mori technique and coproculture were used for the detection of larvae in stool processed within a maximum of four hours of collection. Prevalence was determined at the three main time points of the study, incidence was assessed during the two study phases, and PTI was defined as an infection detected nine months post-treatment.ResultsA total of 262 participants were included. The overall prevalence of STH infections was 42% (95%CI: 34–50) and 44% (95%CI: 37–51) at baseline for the six and nine month FUPs, respectively. Trichuris trichiura was the most prevalent species at each time point of assessment. The cumulative incidence of STH at the 6- and 9-month follow-ups was 18% (95%CI: 12–27) and 35% (95%CI: 27–43), respectively, while the incidence rates were 41 (95%CI: 28–55) and 56 (95%CI: 46–67) per 100 person-years, respectively. The PTI rates at the 9-month follow-up for T. trichiura, hookworm, and Ascaris lumbricoides were 58% (95%CI: 41–74), 31% (95%CI: 11–59) and 18% (95%CI: 5–40), respectively. The STH infection intensity was generally light.ConclusionThe prevalence level of STH infection is moderate in the vicinity of Lambaréné, with T. trichiura being the most prevalent species. Our results reveal a rapid spread of the disease in the population mainly following intervention, particularly for trichuriasis, and therefore call for the full implementation of the World Health Organization’s recommendations in the area.Trial registration clinicaltrials.gov Identifier NCT02769013. Registered 21 April 2016, https://clinicaltrials.gov/study/NCT02769013

The Role of Parents in Fulfilling Nutrition and Respiratory Health for Children in Agricultural Area: Literature Review

Parents have a very important role in fulfilling the nutritional status of children. Lack of nutritional knowledge, especially in agricultural areas, influences food processing behavior so that nutritional problems in children tend to increase. This literature review aims to describe mother's knowledge, family support and risk factors for infectious diseases with nutritional status and respiratory problems in children in agricultural areas. Methods: This research uses the literature review study method with 4 databases, namely Google Scholar, PubMed, Scient Direct, and Springer with a range of 2019-2023. Result: The role of parents is related to nutritional status and health conditions in children. Parental education, inadequate environmental conditions, and potential risk factors can also affect the nutritional status and respiratory problems in children under five in agricultural areas. Babies born to mothers with low levels of education have a higher risk of experiencing health problems than babies born to mothers with higher education. The occurrence of ISPA in agricultural areas is caused by various environmental factors such as exposure to smoke and inadequate physical conditions of houses which can worsen indoor air quality. Potential risk factors that can cause STH infection are parental education and occupation, how to play on the ground, use of the toilet and how to wash hands. Nurses must provide support and education to people in agricultural areas related to providing nutritional intake, quality of living environment, and patterns of daily life in order to reduce problems with nutritional status and respiratory disorders in children.

The Relationship Between Soil-Transmitted Helminth Infections and Environmental Factors in Puerto Iguazú, Argentina: Cross-Sectional Study.

Soil-transmitted helminths (STHs) are widely distributed throughout the world. Various factors, including the environment, socioeconomic characteristics, and access to water and sanitation, play an important role in the spread and persistence of these parasites within communities. They, in turn, affect the growth and development of members of the community, especially children. Studies in the northern provinces of Argentina have shown variable prevalence of STHs, but the factors associated with their presence have not been completely elucidated. This cross-sectional study aimed to identify the socioeconomic and environmental factors related to STH infection in indigenous villages located in Puerto Iguazú (Misiones), Argentina. Between 2018 and 2019, stool samples were collected from individuals ≥1 year residing in 3 villages: Mini-Marangatú, Yriapú, and Fortín Mbororé. Standard parasitological methods were used to determine STH prevalence. Standardized questionnaires were used to assess participants' habits, customs, and household characteristics, and environmental data were obtained through satellite imagery. Multilinear regression with Akaike information criterion stepwise variables was used to explore relevant associations. A total of 342 individuals from the 3 villages participated in this study. The prevalence of STHs varied across villages: 89.6% (43/48), in Mini-Marangatú, 80.8% (101/125) in Yriapú, and 68.5% (115/169) in Fortín Mbororé. Notably, there was a significant difference in hookworm infection among the villages (P=.02). The analysis highlighted the significant influence of specific environmental factors on STH presence and spatial distribution, particularly in relation to hookworm infection. Vegetation patterns represented by the Vegetation Heterogeneity Index, created ad hoc for this study, emerged as a critical factor, with 2 significant predictors related to it (P=.002 and P=.004) alongside impervious surface density with a significant predictor (P<.001). The multilinear regression model yielded a high F test score (F108=4.75, P<.001), indicating a strong fit (R2=0.5465). Furthermore, socioeconomic factors, including walking barefoot in houses with dirt floors and overcrowding, were significantly correlated with hookworm infection intensity (P<.001 and P=.001, respectively). We also used the multilinear regression model to calculate hookworm infection intensity (F110=21.15, P<.001; R2=0.4971). Our study underscores the complexity of STH transmission, as villages with similar living conditions and environmental characteristics displayed varied STH prevalence and spatial distribution. Specific environmental factors, such as vegetation pattern and impervious surface density, played major roles in STH presence, demonstrating the crucial relationship between environmental factors and hookworm infection distribution. Moreover, our findings emphasize the significant influence of socioeconomic factors on hookworm infection intensity. By gaining insights into this complex interplay, our research contributes to a better understanding of STH transmission characteristics, thereby informing targeted public health interventions for effective control.

Source of household water as main risk factor of soil-transmitted helminth infections among elementary school pupils in Wamena District, Jayawijaya Regency, Papua

BackgroundSoil-transmitted helminth (STH) infections are caused by three types of worms: Ascaris lumbricoides, Trichuris trichiura, and hookworms. Soil-transmitted helminth infections have significant health and socioeconomic implications for communities in developing countries, particularly in Indonesia. This study aims to determine the prevalence and risk factors of STH infections among elementary school pupils in Wamena District. MethodsThe study design used was a cross-sectional design involving 317 elementary school pupils. The children were interviewed using a structured questionnaire that included demographic information, hygiene, and environmental sanitation data of the respondents. Stool samples were collected from all consenting participants in sterile plastic containers and were analyzed within 24 hours of collection, using the Kato-Katz method. The data were analyzed using bivariate statistical analysis (Chi-square) and multivariate analysis (logistic regression). ResultsThe prevalence of helminthiasis among elementary school pupils was 19.9% (63/317). STH prevalence of mild category was 17.4% (55/317). The risk factors for STH infections among school children were the habit of not washing hands with soap after defecation, with an odds ratio of 5.04 [95% CI (2.22-11.48)], and the source of water for household use, with an odds ratio of 7.22 [95% CI (3.66-14.22)]. ConclusionThe prevalence of helminthiasis was found to be 19.9% (63/317), with an STH prevalence of mild category. Risk factors for STH infections included the habit of not washing hands with soap after defecation and the source of water for household use.

Epidemiology of soil-transmitted helminths using quantitative PCR and risk factors for hookworm and Necator americanus infection in school children in Dak Lak province, Vietnam

BackgroundSoil-transmitted helminth (STH) infection is driven by a complex interaction of demographic, socioeconomic and behavioural factors, including those related to water, sanitation and hygiene (WASH). Epidemiological studies that measure both infection and potential risk factors associated with infection help to understand the drivers of transmission in a population and therefore can provide information to optimise STH control programmes.MethodsDuring October and November 2019, we conducted a cross-sectional survey of the prevalence and intensity of STH infection and associated risk factors among 7710 primary-school-age children from 64 primary schools across 13 districts in Dak Lak province, Vietnam. Quantitative PCR (qPCR) was used to detect and quantify STH infections.ResultsThe predominant STH species was the hookworm Necator americanus (overall cluster-adjusted prevalence of 13.7%), and its prevalence was heterogeneously distributed across surveyed schools (0% to 56.3%). All other STH species had a prevalence of less than 1%. Using mixed-effects logistic regression, we found that the adjusted odds ratio (aOR) was significantly higher for both infection and moderate-to-heavy-intensity infection with N. americanus among children from multiple ethnic minority groups, compared to children from the majority group (Kinh). Adjusted odds of infection with N. americanus were also higher in children who reported practising open defecation at school (aOR 1.42, 95% CI 1.05, 1.93, P = 0.02) and in those who had an unimproved household water supply (aOR 1.28, 95% CI 1.04, 1.57, P = 0.02). Conversely, children with a flushing household toilet had a reduced risk of infection (aOR 0.58, 95% CI 0.47, 0.70, P < 0.01), as did those whose primary female carer attended secondary (aOR 0.65, 95% CI 0.51, 0.84, P < 0.01) or tertiary education (aOR 0.39, 95% CI 0.24, 0.63, P < 0.01).ConclusionsThis study is the largest reported prevalence survey of STH infections conducted using qPCR as a diagnostic technique. The findings of higher adjusted odds of infection amongst ethnic minority children highlight that STH control programmes may not be reaching certain population groups and that additional culturally appropriate approaches may be required. Additionally, the associations between specific WASH factors and infection indicate potential programmatic targets to complement preventive chemotherapy programmes.Graphical

Prevalence, intensity and associated risk factors of soil-transmitted helminth infections among individuals living in Bata district, Equatorial Guinea.

Soil transmitted Helminths (STH) infections remain a public health concern worldwide, particularly in tropical and subtropical areas where these diseases are highly endemic. Knowing the prevalence and risk factors of the disease is crucial for efficient STH control strategies in endemic areas. The scarcity of epidemiological data on STH for Equatorial Guinea has motivated the decision to perform the present study. A cluster-based cross-sectional study was carried out in Bata district from November 2020 to January 2021. Stool samples were collected for the diagnostic of STH infections using Kato-Katz technique. Descriptive statistics was performed for determination of STH prevalence and intensity, while logistic regression models were used to assess the risk factors associated with STH infections. A total of 340 participants were included in the study with a mean age of 24 years (SD = 23.7) and 1.2 female-to-male sex-ratio. The overall prevalence of any STH was 60% (95%CI: 55-65). The most prevalent species were Ascaris lumbricoides (43%, 95%CI: 37-48) and Trichuris trichiura (40%, 95%CI: 35-46). Intensity of infection were mainly light to moderate. A trend of association was observed between age and any STH infection (overall p-value = 0.07), with a significant difference observed between children aged 5-14 years as compared to those aged 1-4 (aOR 2.12; 95%CI: 1.02-4.43, p-value = 0.04), while locality was significantly associated with STH infection (overall p-value<0.001) with a higher odds observed for peri-urban area as compared to urban area (aOR 4.57; 95%CI: 2.27-9.60, p-value<0.001). Bata district is a high STH transmission area, where school-aged children and peri-urban areas are associated with a higher risk of any STH infection. This situation calls for a full implementation of the WHO recommendations for STH control; mass drug administration of anthelminthic twice a year to the whole population with great attention to school age children, and prioritizing peri-urban areas where safe water, improve sanitation, and hygiene education should be implemented to achieve a better control.

Understanding factors responsible for the slow decline of soil-transmitted helminthiasis following seven rounds of annual mass drug administration (2012–2018) among school children in endemic counties of Kenya: A mixed method study

Soil-transmitted helminthiasis (STH) continue to be a significant health problem in Sub-Saharan Africa especially among school children. In Kenya, treatment of over five million children has been conducted annually in 28 endemic counties since the year 2012. However, the latest monitoring and evaluation (M&E) results indicated a slow decline of prevalence and intensity of STH in some counties after the seven rounds of annual mass drug administration (MDA). The current study sought to determine the factors associated with the slow decline in prevalence and intensity of STH among school children participating in the school deworming programme. Mixed methods cross-sectional study was conducted in three endemic counties of Kenya. For quantitative technique, simple random sampling was used to select 1,874 school children from six purposively selected primary schools. The school children were interviewed, and a single stool collected and analysed using Kato-Katz technique. While for qualitative methods, 15 focus group discussions (FGDs) were conducted with purposively selected parents/guardians of school children. Data was collected through voice records using FGD and analyzed using NVIVO. Prevalence of any STH infection was 30.8% (95%CI: 28.7-32.9), with the highest prevalence observed in Vihiga County (40.7%; 95%CI: 37.4-44.4). Multivariable analysis revealed that geographical location (OR = 3.78, (95%CI: 1.81-7.88) p<0.001), and not washing hands after defecation (OR = 1.91, (95%CI: 1.13-3.20) p = 0.015) were significantly associated with any STH infection. For qualitative analysis, majority of the parents/guardians of SAC felt that poor water sanitation and hygiene practices (WASH) both in school and household level could be a cause of continued STH infection. Also failing to include the rest of the community members in the MDAs were mentioned as possible contributors to observed slow decline of STH. There was moderate STH prevalence and mean intensity despite the seven rounds of repeated annual MDA. The study recommends a revamped awareness creation on WASH and community wide treatment.

Hubungan Infeksi Soil Transmitted Helminth dengan Status Gizi Balita di Desa Tesabela, Kabupaten Kupang, Nusa Tenggara Timur

Helminthiasis infection is one of the diseases that still occurs in the surrounding community. One type of helminthiasis disease that results in infection is the STH worm. Nutritional status problems are commonly encountered in various provinces of Indonesia which results in the quality of oneself for the future will be affected. The purpose of this study was to determine the relationship between helminthiasis infections and nutritional status in toddlers based on anthropometric measurements using weight and height indices. The type of research used is descriptive with a Cross sectional research design. Data that has been collected from 62 patients was described to link STH infection with Nutritional Status in Toddlers. The results of the study stated that there was no relationship between Soil Transmitted Helminth infection and gisi status in toddlers in Tesabela Village, West Kupang District with chis-quare test results, obtained a value of P=0.953 (P&gt;a0.05).

Perceptions and practices of urban slum-dwelling women concerning soil-transmitted helminths infections in Bangladesh: A cross-sectional study.

IntroductionSoil-transmitted helminths (STH) infections are still attributed to a significant part of mortality and disabilities in developing nations. This study aimed at exploring the perceptions and practices concerning STH and to assess the associated risk of infections among slum-dwelling women of Dhaka South City Corporations (DSCC), Bangladesh. Materials and methodsA cross-sectional study was conducted in two selected slums (Malibagh and Lalbagh) of DSCC, Bangladesh, from September 2020 to February 2021. A total of 206 women participants were requested to provide stool samples, followed by a semi-structured questionnaire survey. Parasitological assessment was done by the formol-ether concentration (FEC) technique. Data were analyzed using descriptive statistics, and p-value <0.05 was considered as statistically significant. An adjusted odds ratio (AOR) with a 95% confidence interval (95% CI) was estimated using logistic regression analysis to examine the association between explanatory and outcome factors. ResultsIn total, 36 (17.5%) STH infections were observed out of 206 examined participants. Among the STH, Trichuris trichiura showed the highest prevalence (10.7%), followed by Ascaris lumbricoides (5.3%). Lack of formal education, overcrowded living, large family sizes, and using shared toilets were significantly associated with STH infections. Irregular nail cutting (AOR = 3.12), irregular soap usage after toilet (AOR = 2.98), wearing no shoes (AOR = 4.64), and failing to teach kids to wash their hands (AOR = 3.87) were revealed as practice concerns linked to high STH prevalence. Women, who had never heard about STH (AOR = 2.42) and had no misconceptions regarding STH (AOR = 1.94) were positively related to STH infection in this study. ConclusionSlum-dwelling women in Bangladesh still had a substantial infection of STH. Most of the communities under study were unaware of parasite infection and its negative effects on health. Revision of the policy of ongoing anthelmintic distribution programs and widespread health education programs are recommended aimed at controlling STH.