Control Program Research Articles

Development of an indirect ELISA for the serologic detection of bovine viral diarrhea virus based on E2 antigen sub-genotypes 1b, 1e, and 1d.

Bovine viral diarrhea virus (BVDV) causes ongoing economic losses to cattle industries, directly through reduced herd performance or indirectly through control program costs. ELISA assays, one of the most widely used techniques due to their ease of implementation, have been a valuable tool for mass surveillance and detection of BVDV. In this study, we developed a new indirect ELISA (rE2-ELISA) for serologic detection of BVDV. The assay considers three recombinant E2 protein subtypes as antigens, allowing serologic diagnosis of BVDV-1b (high prevalence worldwide), BVDV-1d and 1e (high prevalence in southern Chile) sub-genotypes. Recombinant E2 (rE2) proteins were successfully expressed in stably transfected CHO cells. Conditions for rE2 ELISAs were established after determining appropriate concentrations of antigen, blocking agent, secondary antibody, and serum dilutions to achieve maximum discrimination between positive and negative serum samples. The developed rE2-ELISA showed a sensitivity of 92.86% and a specificity of 98.33%. Clinical testing of 180 serum samples from herds in southern Chile showed high accuracy (kappa > 0.8) compared to the commercial BVDV Total Ab kit (IDEXX), with 95.37% positive and 87.5% negative predictive value. In addition, the rE2 ELISA has shown the capability to detect anti-BVDV antibodies from naturally infected animals with sub-genotypes 1b, 1e, or undetermined. These results indicate that the developed indirect ELISA could serve as a valid, and efficient alternative for identifying BVDV-infected animals, thus contributing to the success of disease control and eradication programs.

Population-based cohort across stroke life course in India-The NIMHANS-NH-SKAN stroke project: A study protocol.

Stroke is a leading cause of death and disability worldwide. In India, it is the fourth leading cause of death and fifth leading cause of disability, posing a major public health concern. National surveys reveal an increasing trend in stroke risk factors such as tobacco use, physical activity, alcohol use, hypertension, and dyslipidemia. However, knowledge regarding the combined effect of these risk factors and their various combinations is limited. Understanding the individual, combined, and synergistic effects of known risk factors, along with new risk factors, is essential to address gaps in stroke epidemiology. This study aims to examine the effect of various risk factors of acute stroke and their association with stroke occurrence and its outcomes (survival, disability and quality of life). This retrospective-prospective cohort will be conducted in one taluka of Kolara district and two urban wards of Bengaluru with a total population of ~400,000. All stroke-free individuals above 30 years of age ~200,000 individuals in the selected sites will be participants of stroke-free period and all first ever stroke patients in the community will be part of stroke and post-stroke period respectively. The study subjects will be recruited through a complete house-to-house survey at baseline and undergo annual follow-ups during the stroke-free period, with specific assessments at defined time points during the stroke and post-stroke period for a period of one year. Efforts are implemented to minimize loss to follow-up, including community engagement, a helpline number, and hospital-based surveillance. This large population-based cohort study addressing stroke epidemiology in the country, is one -of-its-kind, attempting to fill certain critical gaps in the natural history, management, and outcomes of stroke in India. This research has the potential to provide important insights into the effect of novel risk factors of stroke and various combinations of risk factors of stroke. Furthermore, the development of a stroke risk predictability calculator will add value to the existing Indian National Programme for Prevention & Control of Non-Communicable Diseases (NP-NCD) and offers a model for similar countries once developed.

Trends in Melanoma Incidence, Prevalence, Stage at Diagnosis, and Survival: An Analysis of the United States Cancer Statistics (USCS) Database.

Background and objectives Melanoma, a major skin cancer, has seen varying trends in incidence, prevalence, stage atdiagnosis, and survival. This study examines these trends using the United States CancerStatistics (USCS) database, covering the period from 1999 to 2021. Methods We extracted data from the USCS database, which integrates the National Cancer Institute's (NCI) Surveillance, Epidemiology, and End Results (SEER) program and the Centers for Disease Control and Prevention's (CDC) National Program of Cancer Registries (NPCR). The analysis included new melanoma cases, prevalence estimates (using a 20-year limited duration), stage at diagnosis, and five-year relative survival rates. Incidence rates were adjusted for age using the 2000 United States standard population. Descriptive and trend analyses were performed using IBM SPSS Statistics software, version 29 (IBM Corp., Armonk, NY). Results The analysis of melanoma trends from 1999 to 2021 reveals a significant increase in the annual age-adjusted incidence rate, rising from 15.1 per 100,000 (95% CI: 14.9- 15.2) in 1999 to 23.0 per 100,000 (95% CI: 22.8- 23.1) in 2021. This upward trend is consistent across gender and racial/ethnic groups. The prevalence of melanoma over a 20-year period was 0.279 (95% CI: 0.276-0.282), with males showing a higher prevalence (0.302, 95% CI: 0.298-0.306) compared to females (0.256, 95% CI: 0.252-0.260). The distribution of melanoma stage at diagnosis indicated that 77% of cases were localized (95% CI: 76.5-77.5%), 9.5% regional (95% CI: 9.2-9.8%), 4.7% distant (95% CI: 4.4-5.0%), and 8.8% unstaged (95% CI: 8.5-9.1%). Survival analysis showed a five-year relative survival rate of 99.4% (95% CI: 99.2-99.6%) for localized melanoma and 35.6% (95% CI: 33.7-37.6%) for distant melanoma, highlighting significant disparities in survival based on stage at diagnosis. Conclusions The study highlights a rising incidence of melanoma and emphasizes the critical role of early detection in improving survival outcomes. The findings underscore the effectiveness of early diagnosis and the necessity for ongoing efforts to improve melanoma outcomes across diverse populations.

B-205 Performance of a Novel Fluorogenic Assay for Detection of Carbapenemase-producing Enterbacteriaceae

Abstract Background In recent years, under the selective challenge of antibiotics, the variety and number of drugresistant pathogenic microorganisms have increased significantly, which brings great challenges to clinical diagnosis and treatment, especially the infection caused by carbapenem resistant Enterobacteriaceae (CRE). Carbapenemases production is the main mechanism of drug resistance of Enterobacteriaceae to carbapenems. Drug resistance of Carbapenems can be caused by three mechanisms, resulting in the production of five major Carbapenemases. These are Klebsiella pneumoniae enzyme (KPC), New Delhi metal β-lactamase (NDM), carbapenem hydrolyzed oxalase (OXA-48 like), integrin-encoded metal β- lactamase (VIM) and IMP (Imipenemase). The real-time fluorescence quantitative PCR (qPCR) method based on molecular beacons was combined with the melting curve analysis to identify five drug resistance genes simultaneously by a single PCR reaction, with rapid detection, high sensitivity and strong specificity. Based on this principle, we developed the novel fluorogenic assay for rapid detection of Carbapenemases in multidrug-resistant Enterobacteriaceae (Dynamiker Biotechnology (Tianjin) Co., Ltd.). Methods We evaluated the performance of the novel fluorogenic assay for rapid detection of Carbapenemases in multidrug-resistant Enterobacteriaceae, including the limit of detection (LoD) and cross-reactivity, and compared it with the lateral flow immunochromatography assay (LFA). Results The LoD ranged from 75-450 CFU/mL for the five carbapenemase genes. The analytical specificity for target genes was 100%, as assessed with a panel of 15 pathogens, which indicated no cross-reactions. Comparison of qPCR and LFA results from twenty-three CRE clinical isolates with characterized carbapenemase content demonstrated a complete agreement (Table 1). Conclusions The novel fluorogenic assay for rapid detection of Carbapenemases in multidrug-resistant Enterobacteriaceae is an accurate and rapid method to identify KPC, NDM, VIM, IMP and OXA-48-like carbapenemases in the clinical microbiology laboratory, which can guide infection control programs to limit the spread of these organisms.

The challenging concept of eradication: A core concept guiding and frustrating public health.

The celebrated 1980 announcement that smallpox had been eradicated was made using the following definition of eradication: "Permanent reduction to zero of the worldwide incidence of infection caused by a specific agent as a result of deliberate efforts: intervention measures are no longer needed." Public health around the world works with this definition of "eradication," setting it as a goal for other infectious disease control programs. The definition is simple. Its application, however, has produced long-running and complex public health campaigns that threaten the commitment of funders, health care providers, and governments. In this paper, the authors demonstrate the disease-specific challenges of eradication through the example of the Global Polio Eradication Initiative (GPEI). While many deem eradication worth its high costs because it is the end of morbidity and mortality from a disease, it does not mean the end of disease control efforts. Public health must be prepared for the possibility of disease reoccurrence in the form of undetected natural reservoirs of disease, lab leaks from stored samples, bioterror attacks using stolen samples, and the synthetic recreation of microbes. This paper clarifies the role of reoccurrence prevention in eradication, calling for its addition in the definition of eradication.

Chagas Disease Vectors of Alagoas, Brazil: First Report of Panstrongylus geniculatus (Latreille, 1811) (Hemiptera, Triatominae) in the Brazilian State and Update of the Dichotomous Key Based on Cytogenetic Data.

Panstrongylus geniculatus is the most widely distributed species of Panstrongylus in Brazil and merits attention from vector control programs due to its potential for domiciliation. Specimens infected with Trypanosoma cruzi have already been reported in both peridomiciliary and domiciliary environments. Building on these findings, we report, for the first time, the presence of P. geniculatus in the state of Alagoas and provide an updated dichotomous key (based on cytogenetic data) for species in Alagoas. Panstrongylus geniculatus has been identified in Boca da Mata, Joaquim Gomes, and Novo Lino. In light of the recent notification of Rhodnius domesticus and this record of P. geniculatus, we present an updated identification key enabling the differentiation of all species in Alagoas. Emphasis is placed on the importance of correctly identifying triatomine species because it is crucial for the development of effective control measures, thereby aiding in the mitigation of Chagas disease.

B-109 Six Sigma Analysis for Enhancing Biochemistry Internal Quality Control in a Private Laboratory in India

Abstract Background This abstract outlines a comprehensive study on the application of Six Sigma methodologies to optimize internal quality control processes in a private biochemistry laboratory in India. Data collection was performed using Bio-Rad Assayed Chemistry Control on the Roche cobas 6000 instrument, facilitated by Bio-Rad Unity software. The study adheres to Clinical Laboratory Improvement Amendments (CLIA) 2024 guidelines, specifically focusing on Total Error (TEa). Methods The analytical performances of Cobas c501 insturment as analyse by running biochemical tests (urea, creatinine, uric acid, total bilirubin, AST, Amylase, Lipase, CK, LD, ALT, ALP, LDH, HDL-C, Ca2+, cholesterol, TG, HDL LDL, total protein, albumin, Na+, K+, and Cl−) and glucose on Cobas 400 were evaluated. Biases and CV were obtained from internal quality control programs using biorad unity software. The performance of each instrument was assessed using the σ scale; the benchmark performance was <3 σ (improvement needed); “world-class” quality was six sigma. Results Analytes such as “Alk PO4,” “ALT,” “Amylase,” “Bilirubin,” “CK,” “GGT,” “LD,” “Phosphorus,” “HDL,” “LDL Cholesterol,” “Triglycerides,” and “Uric acid” exhibited impressive sigma scores exceeding 6. Meanwhile, analytes including “Calcium,” “Total Cholesterol,” “Potassium,” “Total Protein,” “Urea,” and “Glucose” achieved sigma scores between 4 and 6, demonstrating noteworthy performance within acceptable bounds. Conclusions This study contributes valuable insights to laboratory management, specifically in the context of biochemistry testing in private Indian laboratories. The adoption of Six Sigma principles, coupled with adherence to CLIA 2024 guidelines and the utilization of advanced instrumentation and software, ensures compliance with regulatory requirements and fosters a culture of continuous improvement. This positions the laboratory to deliver high-quality and reliable results in the dynamic landscape of healthcare diagnostics.

Risk factors for introduction of BVDV in the context of a mandatory control program in Dutch dairy herds.

Bovine Viral Diarrhea Virus (BVDV) is a common viral disease in cattle, causing economic losses in naive herds where the virus is introduced. In the Netherlands, a BVDV control program has been in place since 1998, evolving from voluntary to mandatory participation for dairy herds since April 2018. Participation in the BVDV control program is not mandatory for non-dairy farms. The aim of this study was to determine risk factors for new introduction of BVDV into certified BVDV-free herds in the context of a national BVDV control program in dairy herds. In this retrospective case-control study, survey data were collected from 149 dairy farms that lost their BVDV-free status (case herds) and 148 matched dairy farms that maintained their BVDV-free status (control herds) between 2018 and 2021. The survey captured information about potential risk factors and herd characteristics in the 2 years leading up to the loss of BVDV-free status (case herds, virus detection in at least one animal or when seroconversion was detected) or remaining BVDV-free (control herds). Descriptive statistics and logistic regression with a backward selection and elimination procedure were used to identify potential risk factors associated with losing BVDV-free status. Risk factors were quantified as an Odds Ratio (OR) with the associated 95% confidence interval (CI). The risk factor with the highest OR for losing BVDV-free status was purchasing cattle from herds without BVDV-free status (OR 1.25, CI 1.10-1.41), followed by the farmer having another profession that resulted in contact with other cattle (OR 1.25, CI 1.06-1.47), housing young calves and adult cows in the same barn (OR 1.22, CI 1.08-1.38), having a permanent employee on the farm (OR 1.17, CI 1.04-1.31), having a group calving pen (OR 1.16, CI 1.03-1.32), escaped cattle from other farms that mingled with own cattle (OR 1.16, CI 1.01-1.33), and nearest distance to a non-dairy farm (OR 1.15, CI 1.03-1.28). Although the BVDV status of most dairy herds can be checked in an open register, approximately half of the farmers indicated that they purchased cattle from BVDV-free herds while they were actually purchasing from non-BVDV-free farms. Farmers should be stimulated to actively check the true BVDV status of the herd from which cattle are purchased to further reduce the risk of introduction. In addition, indirect contact with cattle from other farms through either the farmer or other on-farm staff should be avoided. It is strongly advised to work in these situations with proper biosecurity measures such as changing boots and coveralls. The results can be used to improve BVDV control programs to further decrease the prevalence.

Establishing a cancer registry and baseline data for Nyandarua County, Kenya: A step towards establishing a central cancer registry

Cancer is a major global public health issue, causing a significant number of premature deaths worldwide. In 2020, the World Health Organization reported that more than 19 million individuals were diagnosed with cancer, and over 10 million lost their lives to the disease. Predictions indicate that cancer-related deaths will exceed 30 million by 2030, with around 75 % occurring in low- and middle-income countries (LMICs) like Kenya. Various factors contribute to this concerning trend, including aging populations, a high prevalence of cancer risk factors, socioeconomic disparities resulting in limited healthcare access, and deficiencies in healthcare systems within LMICs. This study focused on Nyandarua County, Kenya, which lacks a dedicated cancer registry. Without comprehensive incidence data, the county faces challenges in developing targeted programs for cancer prevention, management, and control. The main objective of this investigation was to establish a cancer registry specific to Nyandarua County, capable of continuously gathering accurate cancer data, patient treatment follow-ups and disease outcomes. A demographic survey was conducted to determine the frequency of all-cause and specific cancers among patients who attended selected health facilities between 2013 and 2020. Data were collected from existing hospital records in three main hospitals in the county. A total of 1373 cases were recorded, with 54.9 % of patients being female. North Kinangop Catholic Hospital accounted for the largest number of patients (62 %), followed by JM Kariuki County Memorial Hospital (35 %), while Engineer Hospital contributed the remaining 3 %. The top five cancer sites observed in Nyandarua County were esophagus (16.8 %), cervix uteri (13.4 %), stomach (10.6 %), breast (8.8 %), and prostate (8.6 %). Our findings provide valuable insights into the prevalence and distribution of different types of cancer in the region. With the establishment of this cancer registry, Nyandarua County is now among the pioneering counties in Kenya. It is crucial for the county government to undertake the responsibility of continuously updating the registry to draw inferences regarding cancer prevalence in the region to enhance patients follow up and survival.

Trimodal skin health programme for childhood impetigo control in remote Western Australia (SToP): a cluster randomised, stepped-wedge trial.

Skin infections affect physical health and, through stigma, social-emotional health. When untreated, they can cause life-threatening conditions. We aimed to assess the effect of a holistic, co-designed, region-wide skin control programme on the prevalence of impetigo. The SToP (See, Treat, and Prevent Skin Sores and Scabies) trial is a pragmatic, open-cohort, stepped-wedge cluster randomised trial involving participants aged 0-18 years in nine remote communities of the Kimberley, Western Australia. The trial involves programmatic interventions in three domains: See (skin checks and skin infection recognition training), Treat (skin infection treatment training, sulfamethoxazole-trimethoprim for impetigo, and ivermectin for scabies), and Prevent (co-designed health promotion and environmental health). Four clusters, defined as pragmatic aggregations of communities, were randomised in two steps to progressively receive the activities during ten visits. The primary outcome was the proportion of school-aged children (aged 5-9 years) with impetigo. We adopted an intention-to-treat analysis and compared the intervention with the control (usual care before the start of intervention) states to derive a time and cluster averaged effect using Bayesian modelling. This study is registered with Australian New Zealand Clinical Trials Registry, ACTRN12618000520235. Between Sept 19, 2018, and Nov 22, 2022, 915 children were consented and 777 (85%) had skin checks performed on at least one of ten possible visits between May 5, 2019, and Nov 22, 2022. Of the participants, 448 (58%) of 777 were aged 5-9 years at one or more of the visit timepoints and were eligible for primary outcome assessment. A decline in impetigo occurred across all clusters, with the greatest decline during the observational period of baseline skin checks before commencement of the interventional trial activities activities. The mean (95% credible interval) for the conditional posterior odds ratio for observing impetigo in the intervention compared with the control period was 1·13 (0·71-1·70). The probability that the intervention reduced the odds of observing impetigo was 0·33. A decreased prevalence of impetigo during the observational period before the commencement of trial activities was sustained across the trial, attributable to the trimodal skin health initiative. Although the prevalence of impetigo reduced, there is no direct evidence to attribute this to the individual effects of the trial activities. The wholistic approach inclusive of skin checks collectively contributed to the sustained reduction in impetigo. Western Australia Department of Health, Australian National Health and Medical Research Council, and Healthway.

Beta-Thalassemia Haplotypes in Southwest of Iran

Background: Thalassemia is a widespread disease affecting people across various ethnicities and regions. In comparison to previous studies conducted in different regions of Iran, such as those in Lorestan and Sistan-Baluchestan, this study highlights unique mutation patterns prevalent in the southwestern population, emphasizing the genetic heterogeneity in this region. The identification of common mutations of beta-thalassemia in various ethnic groups within the nation is regarded as a practical solution for thalassemia prevention and prenatal diagnosis. Materials and Methods: In this retrospective observational study, the medical records of 545 patients with various types of beta-thalassemia (silent, minor, intermediate, and major), referred to the center at Baqaei 2 hospital over a 14-year period (2008–2022), were examined. The age range of patients spanned from a 2-month-old fetus to a 34-year-old individual. Their mutations and thalassemia types were determined and confirmed using molecular methods, including PCR-ARMS (polymerase chain reaction-amplification refractory mutation system) and sequencing. The results were analyzed using SPSS software. Results: The study examined 545 patients and identified 81 types of mutations. The most frequent mutations observed were CD36-37(-T)/N, IVSII-1/N, and IVS1-110(G>A). The study also noted population heterogeneity, reflected in the wide range of mutations found in the region. Among the patients, 6 had the silent form of beta-thalassemia, 488 had the minor form (464 patients and 24 fetuses), 9 had the intermediate form (8 patients and 1 fetus), and 42 had the major form (26 fetuses and 16 adults). Conclusion: The identification of prevalent beta-thalassemia mutations facilitates disease control and prevention programs and is crucial for the identification of various beta-thalassemia gene mutations. This should be re-evaluated periodically. Observing a wide range of beta-thalassemia genotypes in the southwestern region of Iran suggests gene flow; thus, identifying these genotypes is instrumental in preventing and controlling the disease.

Sero-prevalence, associated risk factors and economic impact of camel brucellosis in Elwayye district, southern Ethiopia

Camel brucellosis is a zoonotic and economically important disease that causes low productivity and mortality in animals through abortion and low herd fertility. A cross-sectional study was conducted from March to December 2023 to estimate the seroprevalence of camel brucellosis, associated risk factors, and economic impact in Elwayye district, southern Ethiopia. A total of 240 blood samples were collected from extensively and traditionally managed dromedary camels. The collected samples were subjected to testing for Brucella antibodies using the Rose Bengal Plate Test (RBPT) and indirect ELISA for confirmation. The overall seroprevalence of camel brucellosis in the current study by RBPT was 6.2 %, and by combined RBPT and ELISA, it was 3.7 % (95 % CI: 1.94-7.05). Risk factors like herd size, age, management practice, history of abortion, and sex were assessed. Among these, age, herd size, and management practice were identified as potential risk factors significantly associated with Brucella seropositivity in camels. But the other risk factors were not associated with the disease (P > 0.05). In this study, the total estimated economic loss due to camel brucellosis in the study area was 505,727.2 Ethiopian birr (ETB) for all parameters used. The highest economic loss was due to abortion or perinatal mortality of calves (341,325 ETB). These indicate the need to study camel brucellosis in the study area, and the disease is endemic and prevalent in pastoralist areas, which need well-organized surveillance, disease control, and prevention programs.

AAPM Task Group Report 299: Quality control in multi-energy computed tomography.

Multi-energy computed tomography (MECT) offers the opportunity for advanced visualization, detection, and quantification of select elements (e.g., iodine) or materials (e.g., fat) beyond the capability of standard single-energy computed tomography (CT). However, the use of MECT requires careful consideration as substantially different hardware and software approaches have been used by manufacturers, including different sets of user-selected or hidden parameters that affect the performance and radiation dose of MECT. Another important consideration when designing MECT protocols is appreciation of the specific tasks being performed; for instance, differentiating between two different materials or quantifying a specific element. For a given task, it is imperative to consider both the radiation dose and task-specific image quality requirements. Development of a quality control (QC) program is essential to ensure the accuracy and reproducibility of these MECT applications. Although standard QC procedures have been well established for conventional single-energy CT, the substantial differences between single-energy CT and MECT in terms of system implementations, imaging protocols, and clinical tasks warrant QC tests specific to MECT. This task group was therefore charged with developing a systematic QC program designed to meet the needs of MECT applications. In this report, we review the various MECT approaches that are commercially available, including information about hardware implementation, MECT image types, image reconstruction, and postprocessing techniques that are unique to MECT. We address the requirements for MECT phantoms, review representative commercial MECT phantoms, and offer guidance regarding homemade MECT phantoms. We discuss the development of MECT protocols, which must be designed carefully with proper consideration of MECT technology, imaging task, and radiation dose. We then outline specific recommended QC tests in terms of general image quality, radiation dose, differentiation and quantification tasks, and diagnostic and therapeutic applications.

Development and Implementation of Learning Collaboratives for Infection Prevention and Control Education in Long-Term Care Facilities

Infections in long-term care facilities (LTCFs) pose a critical challenge, with one to three million serious infections annually and up to 380,000 associated deaths. The vulnerability of aging populations and inadequate infection prevention and control (IPC) programs underscore the need for intervention. This initiative provided tailored continuing education through eight virtual learning collaboratives serving 541 infection preventionists. The project also developed nine IPC toolkits and a manual to further support LTCFs' infection prevention efforts.

Evaluation of Postemergence Weed Control Programs in Cotton Without the Addition of Glyphosate

Glyphosate has played an important role in agricultural production systems, especially after the release of glyphosate resistant crops. With increased usage and an overall reliance on chemical control, weed resistance to glyphosate has occurred and is now a major issue. The objective of this research was to investigate weed control levels provided by glufosinate, 2,4-D, and clethodim as an alternative to glyphosate. Multiple POST applications generally provided superior weed control in comparison to a single early-POST application. No programs provided greater than 80% warm-season grass control beginning 21 d after mid-POST application. Applications of glufosinate or glufosinate + 2,4-D fb clethodim + glufosinate, glufosinate + 2,4-D, or clethodim + glufosinate + 2,4-D provided adequate broadleaf weed control throughout the rating period. Although POST-only programs are an option, they are not a sustainable weed control practice. It remains important to incorporate residual herbicides into a weed control program as well as alternative weed control methods.

Infection with pathogenic fungi is a major threat to the mass production of the parasitoid wasp Habrobracon hebetor: 20 generations under surveillance

Pathogen infection is one of the most important challenges threatening the success of mass rearing of natural enemies either in insectaries or in augmentative biological control programs. In this investigation, we studied the biological and population growth parameters of a naturally infected colony of the parasitoid wasp Habrobracon hebetor (Say) (Hymenoptera: Braconidae) over 20 generations (G1inf − G20inf) of rearing on Ephestia kuehniella (Zeller) (Pyralidae: Lepidoptera) under laboratory conditions. Based on morphological characteristics and ITS sequences, two types of fungal colonies were isolated from the diseased females and identified as Thermothielavioides terrestris and Aspergillus flavus. The results showed that although no significant differences were found in the female longevity and fecundity of H. hebetor on E. kuehniella up to G15inf, the duration of the immature period was extended as the number of generations increased. In addition, the intrinsic rate of increase (r) and finite rate of increase (λ) had no significant differences up to G8inf. The net reproductive rate (R0) of G15inf had no significant differences with G2inf, G8inf, and G10inf. On the other hand, in G15inf, R0 was significantly higher than G4inf, G6inf, and G20inf. The findings underscore the negative impact of fungal infection on population growth parameters compared with uninfected population. This study showed that naturally fungal infection of the parasitoid affected the population growth and life table parameters through mass rearing, compared and discussed with the healthy parasitoid.

Species richness and abundance of wild tsetse flies collected from selected human-wildlife-livestock interface in Tanzania

The successful control of tsetse flies largely depends on understanding of the species available and abundance. This study assessed the species richness, abundance and apparent density of wild collected tsetse flies from selected human-wildlife-livestock interface in Tanzania. Seasonal trapping using baited NZI, Pyramidal and Biconical traps was done across selected wards. Traps were set at 200 m apart, emptied after every 24 h then rotated to the next sites after 72 h. Collected flies were identified morphologically and letter confirmed using the Polymerase Chain Reaction (PCR). Only two Glossina species; Glossina pallidipes (n = 371; 47.32 %) and Glossina morsitans morsitans (n = 413; 52.68 %) were identified. Among them, 96 flies (80 Female, 16 Male) were blood fed; 57(48 Female and 9 Male) G. pallidipes and 39(32 Female and 7 Male) G.m. morsitans. Tsetse fly abundance varied across wards (χ2 = 4.597, df = 1, p = 0.032), villages (χ2 = 9.491, df = 3, p = 0.023), habitats (χ2 = 17.239, df = 2, p < 0.001), months (χ2 = 13.507, df = 3, p = 0.004) and deployed traps (χ2 = 6.348, df = 2, p = 0.04). About 78.82 % of the total catch occurred in Kisaki ward (n = 618; p < 0.001) and 21.17 % (n = 166; p = 0.032) in Bwakila chini. Similarly, 62.37 % of the catch occurred in Mbojoge village. NZI traps (n = 422; 54 %; 4.98 FTD) were most successful traps. Moreover, 78.06 % of the catch occurred in bushed grassland habitat (n = 612; 55.41 FTD) while 5.48 % in farmland (n = 43; 7.17 FTD). This study recommends NZI and Pyramidal traps for tsetse flies control at the interface and proposes wet season as appropriate time for successful trapping of the flies. Finally, it attracts a need for assessing tsetse flies' blood meal sources and the infection status to establish the prevalence to inform existing trypanosome control programs.

The role of primary care practitioners in cancer control in South Africa: a systems-based case study

Aim Cancer care has largely been the domain of oncology specialists. With increased awareness of the importance of primary care in the context of universal health coverage, there has been a shift to explore the role of primary care in comprehensive cancer management. This includes health promotion, screening, diagnosing, referral to oncology services, and longitudinal care that includes co-ordination of care, survivorship, and palliative care. This paper focuses on the role of primary care practitioners in health promotion, early detection and care co-ordination. Nurses and doctors who work in primary care are included as primary care practitioners. Methods Using a patient vignette narrative tool, the triad of patient empowerment in the form of enhanced health literacy, clinical competence, and system effectiveness, are discussed as the basis for early cancer detection. A complex intervention to improve primary-level cancer care and the implications thereof for the important role of care co-ordination undertaken by primary care practitioners, is also presented. Findings For effective patient assessment, primary care practitioners must be trained in screening and diagnostic techniques as part of their clinical competencies as generalists. These competencies include risk identification, counselling skills, expert clinical examination, interpretation of basic x-rays, minor surgical skills, interpreting blood tests, and point-of-care ultrasound. Against a backdrop of ongoing budget constraints, consumables and equipment needed for diagnosis should be readily available and referral pathways for patients and specimens should be clearly defined and resourced. Conclusions Primary care practitioners in community-based facilities are well-placed to engage with the psychosociocultural dimensions of care. The SA health system places primary care at the point of closest contact with communities. Efficient care pathways are needed by primary care practitioners to adopt the role of care co-ordinator when patients with suspected or confirmed cancer enter these pathways. When considered alongside the overburdened primary care patient-load and the ever-increasing mix of co-morbidities, the complexity of primary care is appreciated. Understanding the complexities of primary care in the context of cancer control is an important component of a holistic cancer control programme.

The first survey of endoparasite infection in the brown rat (Rattus norvegicus) from a synanthropic environment in Hungary

Urban rats are significant reservoirs of zoonotic endoparasites, posing serious health risks to humans. This study aimed to detect common endoparasites in wild brown rats (Rattus norvegicus) in Budapest, addressing the current lack of endoparasite surveys in Hungary. Carcasses of 131 rats collected following extermination were examined. Three zoonotic helminths were identified: Hymenolepis nana and Hymenolepis diminuta in the jejunum, and Calodium hepaticum in the liver. Additionally, non-zoonotic parasites were detected, including Eimeria spp., Entamoeba muris, Heterakis spumosa, Nippostrongylus brasiliensis, Eucoleus gastricus, Aonchotheca annulosa, Syphacia muris (intestine), and Trichosomoides crassicauda (urinary bladder). Helminth infection prevalence was 83.9 %, with no noticeable differences in prevalence or infection intensity between sexes. These findings highlight the potential public health risk posed by zoonotic parasites in urban rat populations, emphasising the importance of surveillance to mitigate possible human infection. The findings indicate that rats from Budapest harbour similar parasites to those in neighbouring regions. Further large-scale studies are recommended to better understand the parasitic landscape in Hungary's rat populations, leveraging data from rat control programs.

Monitoring of 260 pesticides in extra virgin olive oil and risk assessment for consumers within the framework of the European multiannual control program

The aim of the present research was to develop and validate a robust analytical method for the monitoring of 260 pesticide residues in Extra Virgin Olive Oil (EVOO) expanding the 185 molecules requested by the multiannual control program. The analytical procedure included an ultrasound-assisted liquid-liquid microextraction followed by low-pressure gas chromatography (LP-GC) and ultra-high-performance liquid chromatography (UHPLC), both coupled to triple quadrupole mass spectrometry. Matrix-matched calibration curves showed good linearity with coefficients of determination greater than 0.999. Accuracy values ranged from 65.5 % to 122.3 % and from 61.1 % to 133.3 % for LP-GC and UHPLC, respectively. The recoveries ranged from 14.0 % to 177.9 %.Fifty commercial EVOO, from Italian and EU production, were analyzed to assess pesticide contamination during the 2021–2023 harvesting seasons. The research focused on evaluating consumer risk by assessing both chronic and acute dietary exposure, using the Pesticide Residue Intake Model developed by the EFSA.