Serological survey on Hepatitis E virus in Namibian dogs, cats, horses, and donkeys.

The present study investigated the seropositivity rate of Hepatitis E virus (HEV) in domestic and working animals in Namibia, which included dogs, cats, horses, and donkeys. HEV poses a growing threat as a significant cause of human hepatitis globally and has several genotypes of varying zoonotic potential. As epidemiological data on the seroprevalence of HEV in Namibia is scarce, a serosurvey was conducted on archived serum samples of 374 dogs, 238 cats, 98 horses, and 60 donkeys collected between 2018 and 2022 from different regions, to assess the potential of these animals as sources of HEV infection. The findings revealed that 10.43% (n = 39/374) canine and 5.88% (n = 14/238) feline samples tested positive for HEV antibodies, whereas no seropositivity was detected in horses and donkeys. The study further examined the risk factors associated with HEV seropositivity, including animal sex, age, and geographical region, and noted a higher prevalence in dogs living in areas with intensive pig farming. Although there is no direct evidence indicating that these animals served as major reservoirs for HEV transmission to humans, the study underscores the importance of preventive measures to minimize contact exposure with pets considering the potential zoonotic risk, especially for susceptible risk groups. Further research is needed to explore the zoonotic potential of domestic animals and the epidemiological links between animal and human HEV transmissions in Namibia.

In sickness and health? Examining the co-occurrence and concordance of healthy lifestyle behaviours among spouses in Namibia.

OBJECTIVES: This study examines the extent to which healthy lifestyle behaviours co-occur in individuals. We also explore within-couples concordance in healthy lifestyle behaviours in Namibia. STUDY DESIGN: Cross-sectional study. METHODS: We used data from 910 couples (1820 individuals) who were interviewed in the Namibia Demographic and Health Survey conducted in 2013. We assessed five different healthy lifestyle behaviours (alcohol non-consumption, non-cigarette smoking, healthy diet, physical exercise, and normal body mass index). An individual healthy lifestyle index (HLI) was derived by summing values across the five behaviours, with a binary indicator categorising each individual's lifestyle behaviour as 'healthy' (HLI ≥ 3) or 'unhealthy' (HLI < 3). Multivariate logistic regression models were fitted to explore the association between binary indicators of men's and their female partner's healthy lifestyles. RESULTS: About 48% of men and 57% of women had at least three co-occurring healthy lifestyle behaviours. A third of couples were concordant in reporting a healthy lifestyle (HLI ≥ 3), while 27% were concordant in reporting an unhealthy lifestyle (HLI < 3). In multivariate analysis, Namibian men were almost twice (aOR, 1.90; 95%CI, 1.43-2.52) as likely to have a healthy lifestyle if their female partner also had a healthy lifestyle, compared with those who had a female partner who had an unhealthy lifestyle, after adjusting for relevant individual, partner and household characteristics. CONCLUSION: The observed co-occurrence of healthy lifestyle behaviours and spousal concordance suggests it may be beneficial to consider couples a target for intervention when aiming to promote healthy behaviours and reduce cardiovascular diseases in Namibia.

Utilisation of standardised outcomes measures by clinical Physiotherapists working in Namibia: a nationwide cross-sectional study.

Introduction: The utilisation of standardised outcome measures (SOMs) is crucial for evaluating patients' health status. Physiotherapists are highly recommended to use SOMs routinely. Despite the well-documented benefits of using SOMs, the utilisation of SOMs in clinical practice is still problematic particularly in Africa. In Namibia, there is dearth of information about SOMs utilisation by physiotherapists and the associated factors. This study was aimed at determining the extent of routine utilisation of SOMs and the associated demographic and work-related factors among physiotherapists. Methods: A cross-sectional, nationwide, online survey was conducted and all registered qualified physiotherapists and intern physiotherapists working in public or private hospitals/clinics were invited to participate. Data was analysed using Statistical Package for the Social Sciences (SPSS) version 29.0. The Chi-square (χ2) and Fishers exact test investigated the relationship between the associated factors and routine SOMs utilisation. The alpha level was set at 0.05. Results: Of 230 participants who received the invitational link, 99 (43.0%) responded timeously to the call to participate. Although 97.9% (n=94) of the participants indicated having used at least one type of SOMs in the last six months, the frequency of utilisation varied. Routine utilisation, defined as 70%-100% of the time, was reported in only 49.0% of the participants. The Chi-square test only showed significant findings for gender (p=0.01) and clinical specialty (p=0.004). The odds of utilising SOMs were 4.13 greater among physiotherapists with a clinical specialty and 3.88 times greater for females than males. Conclusion: The rates for routine utilisation of SOMs by Namibian physiotherapists are unfavourable. Female gender and clinical specialty influenced the utilisation of SOMs in daily clinical practice. Cognisant of the study limitations, these results call for the need to improve the routine utilisation of the SOMs in Namibia.

Exploring factors hindering the uptake of HIV pre-exposure prophylaxis by potential users in Namibia.

Background: Pre-exposure prophylaxis (PrEP) is recommended for people who are at substantial risk of HIV infection, in conjunction with other HIV prevention tools and strategies. Unfortunately, the uptake of PrEP among potential users in Namibia's Okongo district is low. Objectives: The objective of this study was to explore and describe the factors that hinder the uptake of HIV PrEP by potential users at the Okongo District Hospital in Namibia. Method: A qualitative exploratory, descriptive and contextual design was used. The study sought to understand the factors hindering uptake of HIV PrEP by potential users in the peri-urban setting of Okongo District Hospital, Namibia. Purposive sampling was used to select participants for this study, with qualitative data being gathered from semi-structured interviews with 20 potential PrEP users. The data were analysed using qualitative thematic analysis. Results: Participants reported numerous factors hindering uptake, including level of understanding, non-compliance on the part of the health department, distances, and attitudes. Additionally, participants maintained that health workers do not put enough effort into educating patients in the different hospital departments about PrEP, and sometimes there is insufficient stock of the medicine, both of which hinder PrEP uptake. Conclusion: Despite the PrEP rollout, multiple obstacles continue to hinder PrEP uptake, especially in the outskirts of Okongo district. This study recognises that there is a need to work hand in hand with the support systems of both potential users.

Molecular Detection and Characterization of Rickettsia Species in Ixodid Ticks from Selected Regions of Namibia.

Rickettsial pathogens are among the emerging and re-emerging vector-borne zoonoses of public health importance. Reports indicate human exposure to Rickettsial pathogens in Namibia through serological surveys, but there is a lack of data on infection rates in tick vectors, hindering the assessment of the relative risk to humans. Our study sought to screen Ixodid ticks collected from livestock for the presence of Rickettsia species in order to determine infection rates in ticks and to determine the Rickettsia species circulating in the country. We collected and pooled Hyalomma and Rhipicephalus ticks from two adjacent regions of Namibia (Khomas and Otjozondjupa) and observed an overall minimum Rickettsia infection rate of 8.6% (26/304), with an estimated overall pooled prevalence of 9.94% (95% CI: 6.5-14.3). There were no statistically significant differences in the estimated pooled prevalence between the two regions or tick genera. Based on the nucleotide sequence similarity and phylogenetic analysis of the outer membrane protein A (n = 9) and citrate synthase (n = 12) genes, BLAST analysis revealed similarity between Rickettsia africae (n = 2) and Rickettsia aeschlimannii (n = 11), with sequence identities ranging from 98.46 to 100%. Our initial study in Namibia indicates that both zoonotic R. africae and R. aeschlimannii are in circulation in the country, with R. aeschlimannii being the predominant species.

Factors affecting the adoption of circular economy in mining companies of developing economies - A Namibian stakeholder perspective.

The factors influencing the adoption and implementation of CE in developing countries are not yet fully examined. By focusing on the Namibian mining sector, this study highlights the perspectives of local stakeholders on CE adoption in a developing country. The mine managers recognized that waste is problematic and that CE practices are beneficial for mining companies and Namibia at large. Our findings also indicated that stronger academic institutions providing CE training and helping develop CE solutions, public awareness campaigns, financial support for CE practices, cooperation among industry stakeholders, and clear CE policy would all help drive the implementation of CE.

Serological Evidence of Crimean-Congo Haemorrhagic Fever in Livestock in the Omaheke Region of Namibia.

This research examined the positivity ratio of Crimean-Congo haemorrhagic fever (CCHF) antibodies in cattle and sheep within Namibia's Omaheke region after a human disease outbreak in the same geographical area. A total of 200 samples (100 cattle and 100 sheep) were randomly collected from animals brought to two regional auction sites, and then tested using the ID Screen® CCHF Double Antigen Multi-Species Enzyme-Linked Immunosorbent Assay kit. Of the cattle samples, 36% tested positive, while 22% of the sheep samples were seropositive. The cattle had a significantly higher positivity ratio than sheep at the individual animal level (p = 0.0291). At the herd level, 62.5% of cattle herds and 45.5% of sheep flocks had at least one positive animal, but this difference was statistically insignificant (p = 0.2475). The fourteen cattle farms with at least one seropositive animal were dispersed across the Omaheke region. In contrast, the ten sheep farms with seropositive cases were predominantly situated in the southern half of the region. The study concluded that the CCHF is endemic in the Omaheke region and likely in most of Namibia, underscoring the importance of continued surveillance and preventive measures to mitigate the impact of CCHFV on animal health and potential spillover into human populations.

Nursing Students' Learning Engagement Experiences During the COVID-19 Pandemic in Namibia: Implications for Nursing Education.

Introduction: Ensuring strong student engagement in both traditional and virtual learning settings was essential for achieving positive educational results during the COVID-19 pandemic. However, fostering student engagement in both the traditional (face-to-face) and virtual learning environments has been accompanied by distinct challenges. There has been a lack of research specifically addressing the issue of nursing students' engagement within a blended learning setting in Namibia. Aim: To explore and describe nursing students' learning engagement experiences at a university campus in Namibia during the COVID-19 pandemic. Methods: A qualitative, descriptive, phenomenological study was employed to collect data from 10 purposively selected nursing students at a university campus in Namibia. Data from in-depth, face-to-face, individual interviews were collected using a semistructured interview guide. Data were analyzed using Colaizzi's seven-step method. Results: The findings of the study describe students' learning engagement experiences under four distinct themes: (a) conditions and contexts of engagement; (b) student acts of engagement: positionality of teacher- and student-facilitated engagement; (c) consequences of engagement in a blended learning environment; and (d) student engagement dispositions: students' initiatives. Conclusion: The research findings revealed that despite mental health challenges, both teacher-facilitated and student-facilitated engagement were necessary for positive learning engagement in the blended learning environment. Student-facilitated engagement was significantly responsible for enabling students to maintain focus, adhere to guidelines, and adapt to the blended learning environment. These findings are useful in understanding the challenges faced by students during the COVID-19 pandemic. The findings thus provide valuable data for future studies seeking to address challenges associated with the blended learning environment.

Ecotoxicological evaluation of surface waters in Northern Namibia.

The increasing pressure on freshwater systems due to intensive anthropogenic use is a big challenge in central-northern Namibia and its catchment areas, the Kunene and the Kavango Rivers, and the Cuvelai-Etosha Basin, that provide water for more than 1 million people. So far, there is no comprehensive knowledge about the ecological status and only few knowledge about the water quality. Therefore, it is crucial to learn about the state of the ecosystem and the ecological effects of pollutants to ensure the safe use of these resources. The surface waters of the three systems were sampled, and three bioassays were applied on three trophic levels: algae, daphnia, and zebrafish embryos. Additionally, in vitro assays were performed to analyze mutagenicity (Ames fluctuation), dioxin-like potential (micro-EROD), and estrogenicity (YES) by mechanism-specific effects. The results show that acute toxicity to fish embryos and daphnia has mainly been detected at all sites in the three catchment areas. The systems differ significantly from each other, with the sites in the Iishana system showing the highest acute toxicity. At the cellular level, only weak effects were identified, although these were stronger in the Iishana system than in the two perennial systems. Algae growth was not inhibited, and no cytotoxic effects could be detected in any of the samples. Mutagenic effects and an estrogenic potential were detected at three sites in the Iishana system. These findings are critical in water resource management as the effects can adversely impact the health of aquatic ecosystems and the organisms within them.

Leveraging Routinely Collected Program Data to Inform Extrapolated Size Estimates for Key Populations in Namibia: Small Area Estimation Study.

BACKGROUND: Estimating the size of key populations, including female sex workers (FSW) and men who have sex with men (MSM), can inform planning and resource allocation for HIV programs at local and national levels. In geographic areas where direct population size estimates (PSEs) for key populations have not been collected, small area estimation (SAE) can help fill in gaps using supplemental data sources known as auxiliary data. However, routinely collected program data have not historically been used as auxiliary data to generate subnational estimates for key populations, including in Namibia. OBJECTIVE: To systematically generate regional size estimates for FSW and MSM in Namibia, we used a consensus-informed estimation approach with local stakeholders that included the integration of routinely collected HIV program data provided by key populations' HIV service providers. METHODS: We used quarterly program data reported by key population implementing partners, including counts of the number of individuals accessing HIV services over time, to weight existing PSEs collected through bio-behavioral surveys using a Bayesian triangulation approach. SAEs were generated through simple imputation, stratified imputation, and multivariable Poisson regression models. We selected final estimates using an iterative qualitative ranking process with local key population implementing partners. RESULTS: Extrapolated national estimates for FSW ranged from 4777 to 13,148 across Namibia, comprising 1.5% to 3.6% of female individuals aged between 15 and 49 years. For MSM, estimates ranged from 4611 to 10,171, comprising 0.7% to 1.5% of male individuals aged between 15 and 49 years. After the inclusion of program data as priors, the estimated proportion of FSW derived from simple imputation increased from 1.9% to 2.8%, and the proportion of MSM decreased from 1.5% to 0.75%. When stratified imputation was implemented using HIV prevalence to inform strata, the inclusion of program data increased the proportion of FSW from 2.6% to 4.0% in regions with high prevalence and decreased the proportion from 1.4% to 1.2% in regions with low prevalence. When population density was used to inform strata, the inclusion of program data also increased the proportion of FSW in high-density regions (from 1.1% to 3.4%) and decreased the proportion of MSM in all regions. CONCLUSIONS: Using SAE approaches, we combined epidemiologic and program data to generate subnational size estimates for key populations in Namibia. Overall, estimates were highly sensitive to the inclusion of program data. Program data represent a supplemental source of information that can be used to align PSEs with real-world HIV programs, particularly in regions where population-based data collection methods are challenging to implement. Future work is needed to determine how best to include and validate program data in target settings and in key population size estimation studies, ultimately bridging research with practice to support a more comprehensive HIV response.

Molecular survey of feline immunodeficiency virus (FIV) infection in Namibian cats.

Feline Immunodeficiency Virus (FIV) is one of the most important infectious diseases of cats, with potential implications in wildlife conservation. Unfortunately, FIV screening and surveillance in domestic cats remains limited in several African countries, including Namibia. In this study, 279 blood samples from domestic cats in Namibia were analyzed for FIV diagnosis by PCR. The cats represented various regions and were cared for by people largely from rural areas with limited financial means. Only 1.43 % of the samples tested positive, unexpectedly low given their outdoor lifestyles. The infected cats, primarily adult and unsterilized, showed no typical FIV symptoms, suggesting subclinical infections. Genetic analysis of the detected strains indicated a unique FIV strain cluster in Namibia, although with a certain within-country variability, in the absence of consistent geographical clustering. The present study represents the first detection and genetic characterization of FIV in the Namibian domestic cat population. Although the infection frequency was low, also in the rural free-roaming population, the features of the enrolled population could have biased the estimation, suggesting the need for more extensive surveys involving diseased and older cats as well. Additionally, because of the long-lasting subclinical nature of the infection, frequent monitoring activities should be performed that allow prompt isolation of infected animals and the implementation of appropriate control measures if necessary.

Bedaquiline Resistance after Effective Treatment of Multidrug-Resistant Tuberculosis, Namibia.

Bedaquiline is currently a key drug for treating multidrug-resistant or rifampin-resistant tuberculosis. We report and discuss the unusual development of resistance to bedaquiline in a teenager in Namibia, despite an optimal background regimen and adherence. The report highlights the risk for bedaquiline resistance development and the need for rapid drug-resistance testing.

Molecular epidemiology and antimicrobial resistance of vaginal Candida glabrata isolates in Namibia.

Candida glabrata is the most common non-albicans Candida species that causes vulvovaginal candidiasis (VVC). Given the intrinsically low susceptibility of C. glabrata to azole drugs, investigations into C. glabrata prevalence, fungal susceptibility profile, and molecular epidemiology are necessary to optimise the treatment of VVC. This molecular epidemiological study was conducted to determine antifungal drug profile, single nucleotide polymorphisms (SNPs) associated with phenotypic antifungal resistance and epidemic diversity of C. glabrata isolates from women with VVC in Namibia. Candida glabrata isolates were identified using phenotypic and molecular methods. Antifungal susceptibility of strains was determined for fluconazole, itraconazole, amphotericin B, and anidulafungin. Whole genome sequencing was used to determine SNPs in antifungal resistance genes and sequence type (ST) allocation. Among C. glabrata isolates, all (20/20; 100%) exhibited phenotypic resistance to the azole class antifungal drug, (fluconazole), and phenotypic susceptibility to the polyene class (amphotericin B), and the echinocandins (anidulafungin). Non-synonymous SNPs were identified in antifungal resistance genes of all fluconazole-resistant C. glabrata isolates including ERG6 (15%), ERG7 (15%), CgCDR1 (25%), CgPDR1 (60%), SNQ2 (10%), FKS1 (5.0%), FKS2 (5.0%), CgFPS1 (5.0%), and MSH2 (15%). ST15 (n = 8/20, 40%) was predominant. This study provides important insight into phenotypic and genotypic antifungal resistance across C. glabrata isolates from women with VVC in Namibia. In this study, azole resistance is determined by an extensive range of SNPs, while the observed polyene and echinocandin resistance-associated SNPs despite phenotypic susceptibility require further investigation.

Candida glabrata is inherently resistant to azole drugs. In this study, we identified a clone that was predominant in women with vulvovaginal candidiasis in Namibia, and that harboured various mutations in resistance-associated genes. This study provides important insight into antifungal resistance across C. glabrata isolates in a sub-Sahara African setting.

Competencies of undergraduate physiotherapy education: A scoping review.

Background: In recent years, the need for competency-based medical education has been emphasised. Each country needs a defined set of physiotherapy competencies from the associations and governing bodies. Objectives: Our review aimed to map competencies of undergraduate physiotherapy education and propose a context-specific competency framework for Namibia. Method: This scoping review was conducted following the Joanna Briggs Institute framework and was reported using the Preferred Reporting for Systematic Reviews and Meta-analysis Extension for Scoping Reviews. Qualitative direct content analysis utilising the five main competency domains from the WHO Rehabilitation Competency Framework was adapted. Results: Five main competency domains were proposed: practice, professional growth and involvement, learning and development, management and leadership, and research. Nineteen potential competencies were identified, and each competency has a set of knowledge and skills activities that is expected of each student. Conclusion: The proposed competencies still need to undergo expert consensus and content validation before they can be adopted and implemented in Namibia. Future studies can explore the perspectives and experiences of the faculty, students and clinicians on the current status of competency-based education of undergraduate physiotherapy programme in Namibia. Similarly, future studies can focus on possible assessment strategies that can be used for each competency and an evaluation framework for assessing milestones in student competencies from entry into clinical education to graduation. Clinical implications: The review proposed a context-specific competency framework for Namibia with a set of knowledge and skills activities that is expected of each student. The faculty can adopt these competencies and improve on their competency-based physiotherapy education.

Erratum: Epidemiology and factors associated with diarrhoea among children under five years of age in the Engela District in the Ohangwena Region, Namibia.

No abstract available.

Malaria elimination and the need for intensive inter-country cooperation. a critical evaluation of regional technical co-operation in Southern Africa.

BACKGROUND: Malaria elimination requires closely co-ordinated action between neighbouring countries. In Southern Africa several countries have reduced malaria to low levels, but the goal of elimination has eluded them thus far. The Southern Africa Development Community (SADC) Malaria Elimination Eight (E8) initiative was established in 2009 between Angola, Botswana, Eswatini, Mozambique, Namibia, South Africa, Zambia, and Zimbabwe to coordinate malaria interventions aiming to eliminate malaria by 2030. Cross-border coordination is important in malaria elimination settings as it strengthens surveillance, joint planning and implementation, knowledge exchange and optimal use of resources. This paper describes how this collaboration is realized in practice, its achievements and challenges, and its significance for malaria elimination prospects. METHODS: The ministers of health of the E8 countries oversee an intergovernmental technical committee supported by specialist working groups consisting of technical personnel from member countries and partner institutions. These technical working groups are responsible for malaria elimination initiatives in key focus areas such as surveillance, vector control, diagnosis, case management, behaviour change and applied research. The technical working groups have initiated and guided several collaborative projects which lay essential groundwork for malaria elimination. RESULTS: The E8 collaboration has yielded achievements in the following key areas. (1) Establishment and evaluation of malaria border health posts to improve malaria services in border areas and reduce malaria among resident and, mobile and migrant populations. (2) The development of a regional malaria microscopy slide bank providing materials for diagnostic training and proficiency testing. (3) A facility for regional external competency assessment and training of malaria microscopy trainers in collaboration with the World Health Organization. (4) Entomology fellowships that improved capacity in entomological surveillance; an indoor residual spraying (IRS) training of trainers' scheme to enhance the quality of this core intervention in the region. (5) Capacity development for regional malaria parasite genomic surveillance. (6) A mechanism for early detection of malaria outbreak through near real time reporting and a quarterly bulletins of malaria incidence in border districts. CONCLUSIONS: The E8 technical working groups system embodies inter-country collaboration of malaria control and elimination activities. It facilitates sustained interaction between countries through a regional approach. The groundwork for elimination has been laid, but the challenge will be to maintain funding for collaboration at this level whilst reducing reliance on international donors and to build capacities necessary to prepare for malaria elimination.

Nurses' barriers to the pressure ulcer risk assessment scales implementation: A phenomenological study.

AIM: The aim of the study was to explore nurses' barriers to the pressure ulcer risk assessment scales implementation. DESIGN: A qualitative descriptive phenomenological study. METHODS: The research participants comprised of 10 nurses at various medical and surgical departments in a teaching hospital northeast of Namibia. Data were collected between August and September 2022 through in-depth, semi-structured face-to-face individual interviews and analysed using Colaizzi's 7-step method. RESULTS: The interviews with nurses, led to two major themes being discovered: (1) factors hindering the effective prevention of pressure ulcers; (2) suggestions for improvements in the utilization of risk assessment scales. The participants noted that they had inadequate knowledge of the formal risk assessment scales; there were inadequate resources and insufficient staff; there were no policies or guidelines regarding the management of pressure ulcers, all of which influenced their utilization of pressure risk assessment scales. Education and training, the provision of equipment, the hiring of new staff and the formulation of policies/guidelines would thus improve the nurses' utilization of the scales. CONCLUSION: The findings of this study have uncovered three primary factors that have a detrimental impact on the utilization of risk assessment scales by nurses, that is their lack knowledge on pressure ulcer risk assessment scales; a shortage of staff and equipment; and an absence of policies/guidelines. The findings from this study provide valuable implications for guiding quality improvement initiatives aimed at enhancing the standard of care in Namibia and other resource-limited settings.

Policy framework that addresses malnutrition in Namibia: A retrospective qualitative review.

BACKGROUND: Although Namibia has made strides in improving the policy enabling environment, eradication of malnutrition is still elusive. OBJECTIVE: This review was aimed at determining the extent to which food and nutrition-related policies in Namibia address malnutrition. METHODS: This study used a qualitative approach by retrospectively analysing policy frameworks that address malnutrition in Namibia from 1991 to 2022. The analysis employed the policy triangle framework to elucidate the contextual factors, content, actors and process involved in the policy development. Moreover, a comparative analysis of Namibian policies and those of other southern African countries was undertaken. RESULTS: The review showed that there is a considerable degree of coherence in policy goals and strategies to address malnutrition despite parallel coordination structures. Policy process involved limited consultations with local communities which might have jeopardised the formulation of community problem-tailored interventions, ownership and participation in policy implementation. There is a strong political commitment to the eradication of malnutrition in Namibia. The Office of the Prime Minister played a leading role in policy development. Influential actors such as the UN agencies elevated the nutrition agenda. Further, the Namibian policy framework was generally similar to those of other southern African countries. CONCLUSIONS: The review showed that Namibia has relevant and comprehensive policies to address malnutrition, however, contextual factors indicated high levels of malnutrition still exist in the communities. Further research is needed to understand the barriers and enablers to optimal nutrition for children under five years in Namibia.

Debiasing thinking among non-WEIRD reasoners.

Human reasoning has been shown to be biased in a variety of situations. While most studies have focused on samples of WEIRD participants (from Western Educated Industrialized Rich and Democratic societies), the sparse non-WEIRD data on the topic suggest an even stronger propensity for biased reasoning. This could be explained by a competence issue (people lack the ability to integrate logical knowledge into their reasoning) or a performance issue (people possess the logical knowledge but do not know it is relevant). We addressed this question using a debiasing paradigm with the base-rate task on a sample of non-industrialized people, the Himba of Namibia. After a short training, most participants were debiased, lending credence to the performance account. Debiasing was however to some extent boosted by schooling and living environment suggesting that competence also plays a role (in that more acquired knowledge allows for a higher training benefit). Results imply that debias interventions can be successfully employed to boost sound reasoning around the world.

High detection frequency and genetic diversity of porcine circovirus 3 (PCV-3) in Namibian backyard farms and warthogs.

Since its first identification in 2015, porcine circovirus 3 (PCV-3) has been reported worldwide with a high frequency and in the presence of several clinical conditions, although its impact on pig health and productivity is still debated. Data on the presence of PCV-3 in Africa are, however, limited. A previous study performed on commercial pigs in Namibia failed to identify the pathogen. In the present study, the viral circulation in backyard farms, characterised by lower biosecurity measures and frequent animal exchange between farms, was assessed. The susceptibility of warthogs to PCV-3 infection and their potential epidemiological role were also evaluated. Tonsils from 77 pigs from backyard piggeries and 55 warthogs were collected in different regions of Namibia and tested by PCR. Positive samples were sequenced and compared to PCV-3 strains circulating globally. Forty-two out of 77 pigs (54.54 %) and 12 out of 55 warthogs (21.82 %) tested positive, demonstrating the presence of PCV-3 in the country and suggesting that the high biosecurity measures implemented in the commercial farms that previously tested negative for PCV-3 probably prevented viral introduction. The partial ORF2 gene was successfully sequenced in samples from 27 pigs and 6 warthogs. Genetically, the identified strains were part of 3 distinct groups which included both backyard pigs and warthogs from different regions of Namibia. There is also evidence for the occurrence of multiple introduction events most likely from Asian countries, either directly into Namibia or through other African countries. Considering the strict Namibian regulations on live animal importation, understanding the source of viral introduction is challenging, although semen importation or the habit of feeding backyard pigs with human food waste might have played a role. Pig exchanges between farms for breeding purposes or wildlife movements could also have been involved in PCV-3 dispersal within Namibia. Despite the significant advances in the field, further studies should be undertaken to properly understand PCV-3 epidemiology in Namibia and its impact on pig productivity and wildlife health.