Malaria Prevention Strategies Research Articles

Epidemiological characteristics and strategies for prevention and elimination of malaria in Qingdao, Shandong Province, China from 1949 to 2021

Epidemiological characteristics and strategies for prevention and elimination of malaria in Qingdao, Shandong Province, China from 1949 to 2021

Tiny Green Army: Fighting Malaria with Plants and Nanotechnology.

Malaria poses a global threat to human health, with millions of cases and thousands of deaths each year, mainly affecting developing countries in tropical and subtropical regions. Malaria's causative agent is Plasmodium species, generally transmitted in the hematophagous act of female Anopheles sp. mosquitoes. The main approaches to fighting malaria are eliminating the parasite through drug treatments and preventing transmission with vector control. However, vector and parasite resistance to current strategies set a challenge. In response to the loss of drug efficacy and the environmental impact of pesticides, the focus shifted to the search for biocompatible products that could be antimalarial. Plant derivatives have a millennial application in traditional medicine, including the treatment of malaria, and show toxic effects towards the parasite and the mosquito, aside from being accessible and affordable. Its disadvantage lies in the type of administration because green chemical compounds rapidly degrade. The nanoformulation of these compounds can improve bioavailability, solubility, and efficacy. Thus, the nanotechnology-based development of plant products represents a relevant tool in the fight against malaria. We aim to review the effects of nanoparticles synthesized with plant extracts on Anopheles and Plasmodium while outlining the nanotechnology green synthesis and current malaria prevention strategies.

Evaluation of naturally acquired immune responses against novel pre-erythrocytic Plasmodium vivax proteins in a low endemic malaria population located in the Peruvian Amazon Basin

BackgroundPlasmodium vivax represents the most geographically widespread human malaria parasite affecting civilian and military populations in endemic areas. Targeting the pre-erythrocytic (PE) stage of the parasite life cycle is especially appealing for developing P. vivax vaccines as it would prevent disease and transmission. Here, naturally acquired immunity to a panel of P. vivax PE antigens was explored, which may facilitate vaccine development and lead to a better understanding of naturally acquired PE immunity.MethodsTwelve P. vivax PE antigens orthologous to a panel of P. falciparum antigens previously identified as highly immunogenic in protected subjects after immunization with radiation attenuated sporozoites (RAS) were used for evaluation of humoral and cellular immunity by ELISA and IFN-γ ELISpot. Samples from P. vivax infected individuals (n = 76) from a low endemic malaria region in the Peruvian Amazon Basin were used.ResultsIn those clinical samples, all PE antigens evaluated showed positive IgG antibody reactivity with a variable prevalence of 58–99% in recently P. vivax diagnosed patients. The magnitude of the IgG antibody response against PE antigens was lower compared with blood stage antigens MSP1 and DBP-II, although antibody levels persisted better for PE antigens (average decrease of 6% for PE antigens and 43% for MSP1, p < 0.05). Higher IgG antibodies was associated with one or more previous malaria episodes only for blood stage antigens (p < 0.001). High IgG responders across PE and blood stage antigens showed significantly lower parasitaemia compared to low IgG responders (median 1,921 vs 4,663 par/µl, p < 0.05). In a subgroup of volunteers (n = 17),positive IFN-γ T cell response by ELISPOT was observed in 35% vs 9–35% against blood stage MSP1 and PE antigens, respectively, but no correlation with IgG responses.ConclusionsThese results demonstrate clear humoral and T cell responses against P. vivax PE antigens in individuals naturally infected with P. vivax. These data identify novel attractive PE antigens suitable for use in the potential development and selection of new malaria vaccine candidates which can be used as a part of malaria prevention strategies in civilian and military populations living in P. vivax endemic areas.

Evaluation of full blood count among plasmodium parasatized pregnant women, in general hospital Sabo Kaduna state, Nigeria

Background: Malaria poses a significant public health challenge in sub-Saharan Africa, particularly among pregnant women, where it contributes to a high burden of infection and mortality. This study aimed to investigate the impact of malaria on haematological and biochemical parameters among pregnant women attending the Antenatal Clinic at General Hospital Sabo Kaduna State, North-Western Nigeria. Methodology: A total of 70 pregnant women participated in the study, with subjects aged between 15 and 40 years. A total of 70 pregnant women participated in the study, 50 of which were malaria positive and 20 of which were malaria negative. Participants were recruited from Antenatal Clinic of General Hospital Sabo, Kaduna State. Socio-demographic characteristic and blood samples were collected and examine for malaria parasite, some haematological parameters (HCT, HGB, WBC, RBC and platelet count) were measured using the sysmex auto-haematology analyzer. Data generated was analyzed using SPSS 22.0 statistical package. Results: Findings revealed that younger women, particularly those aged 21-25 years, constituted a significant proportion of the subjects, consistent with previous reports. Haematological analysis demonstrated a significant decrease in haematocrit (HCT), haemoglobin (HGB), red blood cell count (RBC), and platelet count among malaria parasitized pregnant women compared to controls (p&lt;0.05). However, white blood cell (WBC) count remained within the normal reference range for both groups. Conclusion: These findings corroborate previous research indicating that malaria infection leads to alterations in haematological parameters, primarily attributed to mechanical destruction of parasitized red blood cells and splenic clearance. Furthermore, there should be an enhanced efforts to implement malaria prevention and control strategies, promote sanitation practices to reduce mosquito breeding sites, and prioritize the inclusion of malaria parasite investigation as a routine test in antenatal care for pregnant women.

Distribution of Parasitic Infections among Pupils in Kwara State, Nigeria

Background: Parasitic infections pose a significant health burden among school-age children in Nigeria. Aim and Objective: This study aimed to investigate the distribution of parasitic infections among pupils in Kwara State, Nigeria. Materials and Methods: A total of 638 pupils from various primary schools in Kwara Central, Kwara South, and Kwara North senatorial districts were included in the study. Stool, blood, and urine samples were collected from each participant, and appropriate preservation methods were employed. Parasite identification was carried out using microscopy, staining techniques, and concentration methods described in previous studies. Results: The results revealed an overall prevalence of 19.4% among the pupils, with 80.6% found to be uninfected. The most common parasitic infections were Ascaris lumbricoides (55.6%), Schistosoma mansoni (11.2%), Plasmodium (10.5%), Entamoeba histolytica (8.9%), Hookworm (8.1%), Fasciola gigantica (4.0%), and Schistosoma haematobium (1.6%). Further analysis focused on the age distribution of parasitic infections. Among pupils aged 1–5 years, Plasmodium infection had a prevalence of 23.1%. In the 6–10 years age group, A. lumbricoides (59.4%), S. mansoni (74%), E. histolytica (45.5%), Hookworm (30.0%), F. gigantica (20%), and Plasmodium (61.5%) were prevalent. Among pupils aged 11–15 years, A. lumbricoides (40.6%), S. mansoni (28.6%), E. histolytica (54.5%), Hookworm (70.0%), F. gigantica (60.0%), Plasmodium (15.4%), and S. haematobium (1.6%) were observed. Pupils aged 16–20 years showed a lower prevalence of parasitic infections, with F. gigantica (20%) being the only detected parasite. Conclusion: The findings highlight the varying distribution of parasitic infections among different age groups, emphasizing the need for age-specific interventions. The high prevalence of certain parasites, such as A. lumbricoides, S. mansoni, and Plasmodium, indicates the importance of implementing targeted deworming programs, improved sanitation, hygiene practices, and malaria prevention strategies. These measures can effectively reduce the burden of parasitic infections and promote the health and well-being of pupils in Kwara State, Nigeria.

Enhancing IPTp Program Implementation: Provider Practices, Challenges, and Malaria Prevalence among Pregnant Women in Uganda

Malaria remains a formidable public health threat, particularly in sub-Saharan Africa, where pregnant women face heightened vulnerability. Intermittent Preventive Treatment in pregnancy with Sulfadoxine Pyrimethamine (IPTp-SP) stands as a pivotal strategy in malaria prevention efforts. However, its full potential is hindered by challenges in implementation. This study, conducted at Bushenyi Health Centre IV in Uganda, scrutinized provider practices, challenges encountered, and malaria prevalence among pregnant women attending antenatal care services. Through a descriptive cross-sectional approach involving 151 pregnant mothers and 15 antenatal care providers, analysis revealed noteworthy insights. While a majority of pregnant women received IPTp-SP, adherence to WHO guidelines regarding administration timing and frequency was suboptimal. Notably, over half of the providers reported stockouts of IPTp-SP, leading to significant delays in replenishment and impeding service delivery. Moreover, providers identified a crucial link between women's knowledge and IPTp uptake. The study also uncovered a malaria prevalence of 7.9% among pregnant women. These findings underscore the urgent need to address implementation challenges, particularly in supply chain management and health education, to fortify malaria prevention strategies for pregnant women in Uganda. Keywords: Malaria, Pregnant women, IPTp-SP, Antenatal care, Implementation challenges, Supply chain management, Health education, Uganda.

Utilization of malaria preventive strategies among pregnant women at Adeoyo Maternity Teaching Hospital, Ibadan, Nigeria

INTRODUCTION: Malaria in pregnancy is associated with a high rate of maternal and perinatal morbidity and mortality. Utilization of preventive strategies during pregnancy is an integral part of controlling the burden of malaria in pregnancy. This study evaluated the malaria preventive strategies utilized and the prevalence of asymptomatic malaria among pregnant women at Adeoyo Maternity Teaching Hospital (AMTH), Ibadan, Nigeria.&#x0D; METHODS: A facility-based descriptive cross-sectional study among 223 pregnant women in Adeoyo Maternity Teaching Hospital, Ibadan, Nigeria. Information on socio-demographic and obstetric characteristics, malaria symptoms, and the preventive strategies utilized were obtained using a structured questionnaire. Descriptive and bivariate analysis using chi-square test and multivariate analysis at 95% confidence interval and p&lt; 0.05 was used to determine the predictors of asymptomatic malaria infection in relation to socio-demographic characteristics and malaria preventive strategies utilized.&#x0D; RESULTS: The mean age was 30±5 years. More than half (53.4%) of them used insecticide-treated nets consistently, 49.3% sprayed the room regularly with insecticides, while the majority (88.3%) reported they maintained a clean environment. However, 11.7% tested positive for the malaria parasite. Consistency in the use of insecticide-treated net (ITN) and participants age were factors associated with malaria occurrence (p=0.01). The use of ITN and being &gt;30 years of age are protective factors against having malaria infection among pregnant women (AOR= 0.34; 95%, CI=0.14-0.84) and (AOR=0.31; 95% CI=0.13-0.76) respectively.&#x0D; CONCLUSION: Irrespective of all other malaria preventive strategies adopted by pregnant women, consistent use of ITN was independently a protective factor against developing malaria in pregnancy.

Demographic and socio-economic factors affecting bed net ownership, usage, and malaria transmission among adult patients seeking healthcare in two Ghanaian urban cities

BackgroundThe most cost-effective malaria prevention and control strategy is the use of a bed net. However, several factors affect the ownership and usage of bed nets among the adult population. Hence, this study aimed to examine socio-demographic factors affecting bed net ownership, usage and malaria transmission among adult patients seeking healthcare in two Ghanaian urban cities.MethodsThis hospital-based cross-sectional study was conducted, between January and September 2021, at Bremang Seventh-Day Adventist Hospital, Suame Municipal, Ashanti Region and Sunyani Municipal Hospital, Sunyani, Bono Region, Ghana. Structured questionnaires were administered to a total of 550 participants to ascertain their ownership and usage of the bed nets. Afterwards, finger prick blood samples were collected for malaria microscopy. Crude and adjusted prevalence ratios (PR) and their respective 95% CIs were calculated, using Poisson regression with robust standard errors, to show associated variables in bivariate and multivariate analyses respectively. R software (version 4.1.1) was used to perform all statistical analyses.ResultsAbout 53.3% (n = 293) of participants owned at least one-bed net but only 21.5% (n = 118) slept under it the previous night. Those married were 2.0 (95% CI: 1.6 – 2.5) and 2.4 (95% CI: 1.6 – 3.5) times more likely to own and use a bed net respectively than those who never married. Also, pregnant women were 1.3 (95% CI: 1.1 – 1.6) and 1.8 (95% CI: 1.3 – 2.5) times more likely to own and use a bed net respectively than non-pregnant. Even though income levels were not associated with bed net ownership and usage, students were 0.4 (95% CI: 0.2 – 0.6) and 0.2 (95% CI: 0.1 – 0.5) times less likely to own and use bed net respectively compared to formally employed persons. The overall malaria prevalence rate was 7.8%. Malaria-negative patients were 1.6 (95% CI: 1.2 – 2.0) and 2.4 (95% CI: 1.4 – 4.1) times more likely to own and use bed nets respectively than malaria positive. Patients with tertiary education recorded the lowest malaria prevalence (3.5%, n = 4). None of those with a monthly income > $300 recorded a case of malaria. On the contrary, majority 83%, n/N = 25/30) of the malaria-positive patients earned ≤ $150.ConclusionThe National Malaria Control Program should conduct comprehensive mapping of all urban population segments before launching mass bed net distribution campaigns, taking into account demographic and socioeconomic factors to enhance bed net utilization and reduce malaria prevalence.

Malaria prevalence and associated factors among symptomatic children aged under five years attending Sheko District Health Center, Southwest Ethiopia: A cross-sectional study.

Malaria is a major cause of morbidity and mortality in children under the age of five worldwide. Although various malaria elimination measures have been implemented over the past decades, malaria remains a serious threat to public health, especially in tropical and subtropical areas. Ethiopia has set targets for eliminating malaria by 2030. No research has been conducted in the study area concerning malaria among children, who are the most malaria-prone segment of a community. The purpose of this study was to assess malaria prevalence and the factors associated with it among children under five years of age who attended the Sheko Health Center, Southwest Ethiopia, from June 1 to October 30, 2022. An institutional-based cross-sectional study was employed from June 1 to October 30, 2022, at the Sheko Health Center. Capillary blood samples were collected from 286 randomly selected symptomatic children. Data on socio-demographics and associated factors were collected using a pre-tested structured questionnaire, and data on parents' and guardians' knowledge about malaria was recorded on Excel 2016 Spreadsheets after interviewing them, and their responses were presented by a frequency table. Data were entered into Epi Data Manager (v4.0.2.101) and analyzed using the Statistical Package for Social Sciences (SPSS) version 25. Associated factors of malaria were analyzed using bivariate and multivariable logistic regression, and statistical significance was set at P < 0.05. Overall, 23.4% (95% CI = 18.6-28.8%) malaria infection was recorded among the children whose blood samples were examined, with Plasmodium falciparum, Plasmodium vivax, and mixed infections (both species) representing 52.2%, 34.3%, and 13.4% of the cases, respectively. The majority of the parents or guardians believed that malaria is transmissible but could be prevented, and 80% of them considered mosquito bites to be the main mode of malaria transmission. Insecticide-treated net (ITN) was mentioned as a malaria prevention strategy by more than half of the respondents, while indoor residual spraying (IRS) was considered only by 19.6%. Based on multivariable logistic regression analysis, a significant association was found in children between the ages of 12 and 36 months (adjusted odds ratio = 5.050; 95% CI: 1.964-12.982), children who lived in rural areas (adjusted odds ratio = 2.901; 95% CI: 1.439-5.845), and children who did not use ITN the past two weeks before sample collection (adjusted odds ratio = 3.341; 95% CI: 1.646-6.781). This study revealed a high malaria prevalence among children aged under five years. Attention must be paid to improving the coverage of the ITN and its use in the study area, which could help reduce the risk of mosquito bites. Health education for the guardians of the children could also help to raise awareness about the prevention and control strategies for malaria transmission and further reduce the impact of the disease.

In-silico analysis of potent Mosquirix vaccine adjuvant leads

BackgroundWorld Health Organization recommend the use of malaria vaccine, Mosquirix, as a malaria prevention strategy. However, Mosquirix has failed to reduce the global burden of malaria because of its inefficacy. The Mosquirix vaccine’s modest effectiveness against malaria, 36% among kids aged 5 to 17 months who need at least four doses, fails to aid malaria eradication. Therefore, highly effective and efficacious malaria vaccines are required. The well-characterized P. falciparum circumsporozoite surface protein can be used to discover adjuvants that can increase the efficacy of Mosquirix. Therefore, the study sought to undertake an in-silico discovery of Plasmodium falciparum circumsporozoite surface protein inhibitors with pharmacological properties on Mosquirix using hierarchical virtual screening and molecular dynamics simulation. ResultsMonoclonal antibody L9, an anti-Plasmodium falciparum circumsporozoite surface protein molecule, was used to identify Plasmodium falciparum circumsporozoite surface protein inhibitors with pharmacological properties on Mosquirix during a virtual screening process in ZINCPHARMER that yielded 23 hits. After drug-likeness and absorption, distribution, metabolism, excretion, and toxicity property analysis in the SwissADME web server, only 9 of the 23 hits satisfied the requirements. The 9 compounds were docked with Plasmodium falciparum circumsporozoite surface protein using the PyRx software to understand their interactions. ZINC25374360 (−8.1 kcal/mol), ZINC40144754 (−8.3 kcal/mol), and ZINC71996727 (−8.9 kcal/mol) bound strongly to Plasmodium falciparum circumsporozoite surface protein with binding affinities of less than −8.0 kcal/mol. The stability of these molecularly docked Plasmodium falciparum circumsporozoite surface protein-inhibitor complexes were assessed through molecular dynamics simulation using GROMACS 2022. ZINC25374360 and ZINC71996727 formed stable complexes with Plasmodium falciparum circumsporozoite surface protein. They were subjected to in vitro validation for their inhibitory potential. The IC50 values ranging between 250 and 350 ng/ml suggest inhibition of parasite development. ConclusionTherefore, the two Plasmodium falciparum circumsporozoite surface protein inhibitors can be used as vaccine adjuvants to increase the efficacy of the existing Mosquirix vaccine. Nevertheless, additional in vivo tests, structural optimization studies, and homogenization analysis are essential to determine the anti-plasmodial action of these adjuvants in humans.

Disentangling the intersection of inequities with health and malaria exposure: key lessons from rural communities in Northern Borneo

BackgroundThe increasing incidence of Plasmodium knowlesi malaria poses a significant challenge to efforts to eliminate malaria from Malaysia. Macaque reservoirs, outdoors-biting mosquitoes, human activities, and agricultural work are key factors associated with the transmission of this zoonotic pathogen. However, gaps in knowledge regarding reasons that drive malaria persistence in rural Kudat, Sabah, Northern Borneo remain. This study was conducted to address this knowledge gap, to better understand the complexities of these entangled problems, and to initiate discussion regarding new countermeasures to address them. This study aims to highlight rural community members’ perspectives regarding inequities to health relating to P. knowlesi malaria exposure.MethodsFrom January to October 2022, a study using qualitative methods was conducted in four rural villages in Kudat district of Sabah, Malaysia. A total of nine in-depth interviews were conducted with community and faith leaders, after the completion of twelve focus group discussions with 26 photovoice participants. The interviews were conducted using the Sabah Malay dialect, audio-recorded, transcribed, and translated into English. The research team led the discussion and analysis, which was approved by participants through member checking at the community level.ResultsParticipants identified disparity in health as a key issue affecting their health and livelihoods. Injustice in the social environment was also identified as a significant challenge, including the importance of listening to the voices of affected communities in disentangling the social and economic phenomena that can impact malaria control. Specific concerns included inadequate access to health-related resources and degradation of the environment. Participants recommended improving access to water and other necessities, increasing the availability of malaria control commodities in healthcare facilities, and developing sustainable programs to reduce socioeconomic disparities.ConclusionInequities to health emerged as a key concern for malaria control in rural Kudat, Sabah. A locally targeted malaria programme cantered on improving the social and economic disparities associated with health outcomes, could be a potential strategy for malaria prevention in such areas. Community-level perspectives gathered from this study can be used as a foundation for future discussions and dialogues among policymakers and community members for achieving greater transparency, improving social equity, and interoperability in addressing P. knowlesi malaria control.

House-wall modification after indoor residual spraying in Shashogo district, southern Ethiopia

BackgroundIndoor residual spraying has been a key national malaria prevention and control strategy in Ethiopia. However, there is a gap in monitoring and evaluation of house-wall modification after indoor residual spraying before the end of residual lifespan. This study has determined the prevalence of house-wall modification after indoor residual spraying and identified the associated factors in Shashogo district, southern Ethiopia.MethodsA community-based cross-sectional study was conducted from April to May 2022. Data were collected from 640 randomly selected households using a pre-tested questionnaire and an observational checklist. The binary logistic regression models were used to identify factors associated with house-wall modification after indoor residual spraying before the end of the potency period.ResultsThe prevalence of house-wall modification after indoor residual spraying was found to be 30.4% (95% CI 27.4–34.2%). Educational status of could not read and write [AOR = 1.76, 95% CI (1.16, 2.68)], monthly income of more than birr 3000 [AOR = 3.27, 95% CI (1.78, 6.01)], low level of knowledge about indoor residual spraying [AOR = 3.81, 95% CI (2.39, 6.06)], lack of information within two weeks before spraying [AOR = 2.23, 95% CI (1.44, 3.46)], absence of supervision after spraying [AOR = 1.79, 95% CI (1.14, 2.81)], absence of stagnant water near house [AOR = 3.36, 95% CI (2.13, 5.39)], and thatched roof [AOR = 1.82, 95% CI (1.04, 3.16)] were factors significantly associated with house-wall modification after indoor residual spraying.ConclusionThis study has revealed that the prevalence of house-wall modification after indoor residual spraying before the end of the residual lifespan in the study area was higher compared to other studies in developing countries. Therefore, special emphasis should be given to providing community education about indoor residual spraying, conducting regular supervision before and after residual spraying, enforcing some legislative strategies for modifying the house-wall before six months after spraying, and improving environmental and housing conditions.

Universal iron supplementation: the best strategy to tackle childhood anaemia in malaria-endemic countries?

Iron deficiency presents a major public health concern in many malaria-endemic regions, and both conditions affect young children most severely. Daily iron supplementation is the standard public health intervention recommended to alleviate rates of iron deficiency in children, but there is controversy over whether universal supplementation could increase the incidence and severity of malaria infection. Current evidence suggests that iron supplementation of deficient individuals is safe and effective in high-transmission settings when accompanied by malaria prevention strategies. However, low-resource settings often struggle to effectively control the spread of malaria, and it remains unclear whether supplementation of iron replete individuals could increase their risk of malaria and other infections. This review explores the evidence for and against universal iron supplementation programmes, and alternative strategies that could be used to alleviate iron deficiency in malaria-endemic areas, while minimising potential harm.

Clinical Profile and Short-Term Outcome of Malaria in Febrile Under-Five Children in a Secondary Health Facility

Background: Malaria remains an essential tropical protozoal disease, affecting both young and old. It manifests in complicated and uncomplicated forms with more grave consequences among Under-five children. Objective: To describe malaria's clinical profile and short-term outcomes in Under-five children in a secondary health facility in southwest Nigeria. Methods: This was a hospital-based and cross-sectional study. Five hundred children under the age of five years who presented with fever at the health facility were recruited into the study. The clinical manifestations were documented, and blood samples were examined for malaria parasitaemia. Results: Forty-eight children (9.6%) of the study subjects were neonates, 195 (39%) were infants, and the remaining 257 (51.4%) were aged 12 months to 5 years. One hundred and two (39.1%) of the 261 children positive for malaria presented with uncomplicated malaria, while 159 (60.9%) of this population had various complications. The overall mortality from malaria was 5.0%. Conclusion: More than 60% of the infected children had complications of malaria, and mortality was mainly due to late presentation. Therefore, malaria preventive strategies should be part of ongoing health interventions.

Association between Livestock Ownership and Malaria Incidence in South-Central Ethiopia: A Cohort Study.

Zooprophylaxis is one of the possible environmental vector control strategies for malaria prevention. However, its effect on reducing malaria transmission has been questionable, requiring a detailed understanding of contextual factors. This study aims to evaluate the effect of keeping livestock on malaria incidence in south-central Ethiopia. A cohort of 34,548 people in a total of 6,071 households was followed for 121 weeks from October 2014 to January 2017. Baseline data were collected, including livestock ownership. Weekly home visits were done to actively search for malaria cases, and passive case detection was also carried out. Malaria was diagnosed with rapid diagnostic tests. Log binomial and parametric regression survival-time models were used to estimate effect measures. A total of 27,471 residents had complete follow-ups, and the majority (87.5%) lived in households owning livestock, including cattle, sheep, goats, and chickens. The overall incidence risk of malaria was 3.7%, and there was a 24% reduction in the risk of malaria among livestock owners. The total cohort contributed to 71,861.62 person-years of observation. The incidence rate of malaria was 14.7 cases per 1,000 person-years. There was a 17% reduction in the rate of malaria among livestock owners. Meanwhile, the protective effect of livestock ownership increased as the number of livestock or the livestock-to-human ratio increased. In conclusion, livestock owners had less malaria. In a setup where domestication of livestock is a common practice and the predominant malaria vector tends to feed more on livestock than humans, zooprophylaxis remains a promising strategy for malaria prevention.

Identification of a long noncoding RNA required for temperature induced expression of stage-specific rRNA in malaria parasites

Protozoan parasites of the genus Plasmodium cause malaria, a mosquito borne disease responsible for substantial health and economic costs throughout the developing world. During transition from human host to insect vector, the parasites undergo profound changes in morphology, host cell tropism and gene expression. Unique among eukaryotes, Plasmodium differentiation through each stage of development includes differential expression of singular, stage-specific ribosomal RNAs, permitting real-time adaptability to major environmental changes. In the mosquito vector, these Plasmodium parasites respond to changes in temperature by modulating transcriptional activities, allowing real-time responses to environmental cues. Here, we identify a novel form of long noncoding RNA: a temperature-regulated untranslated lncRNA (tru-lncRNA) that influences the Plasmodium parasite’s ability to respond to changes in its local environment. Expression of this tru-lncRNA is specifically induced by shifts in temperature from 37 °C to ambient temperature that parallels the transition from mammalian host to insect vector. Interestingly, deletion of tru-lncRNA from the genome may prevent processing of S-type rRNA thereby affecting the protein synthesis machinery. Malaria prevention and mitigation strategies aimed at disrupting the Plasmodium life cycle will benefit from the characterization of ancillary biomolecules (including tru-lncRNAs) that are constitutively sensitive to micro- environmental parameters.

Molecular detection and species identification of Plasmodium spp. infection among imported cases in Eastern China, 2012-2018.

Due to the increasing number of returnees from malaria endemic areas, imported malaria has become a public health challenge in China. To better understand the characteristics of imported Plasmodium species and adjust appropriate strategies for malaria prevention and control in Eastern China, we conducted molecular detection and species identification on 1282 imported malaria cases in Shandong Province between 2012 and 2018. The findings showed that P. falciparum was predominant, particularly in cases imported from Africa. P. vivax was the dominant species imported from Asian countries. Additionally, imported P. ovale and P. malariae emerged in the province. Further surveillance and control of imported malaria among returnees from Africa and Southeast Asia is needed to be strengthened in Eastern China.

Prevalence, trends and associated factors of malaria in the Shai-Osudoku District Hospital, Ghana

BackgroundEven though malaria is easily preventable and treatable, it continues to have a devastating impact on people’s health and livelihoods around the world. Sub-Saharan Africa carries a disproportionately high share of the global malaria burden. This study seeks to assess the prevalence, trends and factors associated with malaria in the Shai-Osudoku District Hospital, Ghana.MethodsA cross-sectional study was conducted to determine the prevalence, trend, and factors associated with malaria in the Shai-Osudoku District Hospital; a 10-month secondary data was extracted from February to November 2020. The extracted data were entered into Epi Data version 6 and analysed using STATA version 16. Descriptive analysis was performed to determine the prevalence, trend and socio-demographic characteristics of study participants. Simple logistic regression at a 95% confidence level was performed to investigate socio-demographic factors associated with malaria infection. Tables and charts with summary statistics were used to present the results.ResultsSecondary data from 3896 individuals were included in the study. The age of the participants range from 0.8 to 101 years with a mean age of 32.5. The estimated prevalence of malaria during the study period is 20.9%. A majority (79.1%) of the participants who presented signs and symptoms of malaria were negative after testing. The prevalence of malaria cases increased progressively from 6.7 to 55.4% across the ten months. The simple logistic regression at a 95% confidence level revealed that age group, sex, residential status, religion, occupation and marital status were statistically significantly associated with malaria. The results shows that persons who tested positive for malaria were mostly treated with artemether-lumefantrine (46.1%), some malaria positive cases were given artesunate injection (11.6%), dihydroartemisinin-piperaquine (16.2%) and oral artemether-lumefantrine (6.5%). Surprisingly 19.6% of the malaria-positive cases were not given any form of malaria medication.ConclusionFactors found to influence malaria infection in the Shai-Osudoku District Hospital include participant’s age, sex, residential status, religious affiliation occupation and marital status. The findings of this study showed that malaria remains a serious public health problem in the Shai Osudoku District Hospital. The information obtained from this study can guide the implementation of malaria prevention, control and elimination strategies in Ghana.

Effectiveness of seasonal malaria chemoprevention administered in a mass campaign in the Kedougou region of Senegal in 2016: a case-control study.

Background: Seasonal malaria chemoprevention (SMC) with sulfadoxine-pyrimethamine plus amodiaquine (SPAQ) is a malaria prevention strategy recommended since 2012 by the World Health Organization (WHO) for children under 5 years. In Senegal, the scaling up of SMC started in 2013 in the south-eastern regions of the country with an extension of the target to 10 years old children. The scaling up of SMC requires regular evaluation of the strategy as recommended by the WHO. This study was conducted to evaluate the effectiveness of SMC. Methods: A case-control study was conducted in some villages of the health districts of Saraya and Kedougou in the Kedougou region from July to December 2016. A case was a sick child, aged 3 months to 10 years, seen in consultation and with a positive malaria rapid diagnostic test (RDT). The control was a child of the same age group with a negative RDT and living in the same compound as the case or in a neighbouring compound. Each case was matched with two controls. Exposure to SMC was assessed by interviewing the mothers/caretakers and by checking the SMC administration card. Results: Overall, 492 children, including 164 cases and 328 controls, were recruited in our study. Their mean ages were 5.32 (+/- 2.15) and 4.44 (+/-2.25) years for cases and controls, respectively. The number of boys was higher in both cases (55.49%; CI 95%=47.54-63.24%) and controls (51,22%; CI 95%=45.83-56.58%). Net ownership was 85.80% among cases and 90.85% among controls (p=0,053). The proportion of controls who received SMC was higher than that of cases (98.17% vs 85.98% and p=1.10 -7). The protective effectiveness of SMC was 89% (OR= 0.12 (CI 95%=0.04-0.28)). Conclusions: SMC is an effective strategy in the control of malaria in children. Case-control studies are a good approach for monitoring the efficacy of drugs administered during SMC.

Overview of malaria prevention and treatment management in The Gambia: a descriptive study

Malaria is a significant public health problem in The Gambia, a country in West Africa with a population of about 2.4 million people. The disease is endemic in the country and is a major cause of morbidity and mortality, especially among children under five. Malaria prevention strategies are essential in The Gambia. Although not totally but significantly, several techniques have been implemented in The Gambia to combat the spread of malaria to prevent and control the disease. This study aims to explore and provide an overview of strategies implemented in The Gambia to prevent and manage malaria in children under five. The study was a descriptive study using situational analysis with an extension of the basic guidelines established by WHO to prevent malaria by analyzing the latest developments on the progress made in The Gambia. The Gambia has made significant progress in preventing and controlling malaria through strategies, including insecticide-treated nets (ITNs), indoor residual spraying (IRS), antimalarial treatment, education and awareness, and environmental management. Sustained efforts and investments in these strategies are critical to reducing the population burden of malaria and achieving the goal of malaria elimination.