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      Knowledge, attitudes, practices (KAP) and control of rabies among community households and health practitioners at the human-wildlife interface in Limpopo National Park, Massingir District, Mozambique

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          Abstract

          Background

          Rabies is a viral zoonotic disease that kills more than 26,000 people each year in Africa. In Mozambique, poverty and inadequate surveillance result in gross underreporting and ineffective control of the disease in animals and people. Little is known of the role of human attitudes and behaviour in prevention or control of rabies, thus this study was undertaken to assess the knowledge, attitudes and practices amongst selected households and health practitioners in one affected area, the Limpopo National Park (LNP), Massingir district.

          Methodology

          A cross-sectional study was conducted among 233 households in eight villages in LNP and among 42 health practitioners from eight health facilities in Massingir district between 2016 and 2018. Consenting household representatives aged 18 years or over were purposively selected. A KAP survey was administered to obtain information on dog ownership and knowledge of rabies, host species affected, modes of transmission, symptoms, recommended treatment and preventive methods.

          Similar to household study participants, health practitioners were purposively selected and completed the questionnaire during the investigators’ visit. The questionnaire sought information on knowledge of rabies, management of bite wounds, vaccination sites and schedules of pre- and post-exposure prophylaxis. Descriptive and inferential data analyses were performed using SPSS software version 18.0.

          Results

          Approximately twenty per cent (18.9%; 95% CI: 14.3–24.3) and 13.3% (95% CI: 9.4–18.1) of households had good knowledge and practices of rabies, respectively. For health practitioners, only 16.7% (95% CI: 7.5–31.9) had good knowledge, whilst 33.3% (95% CI: 20.0–49.7) adopted adequate attitudes/practices towards the disease.

          Conclusions/Significance

          In conclusion, both households and health practitioners displayed poor levels of knowledge and adopted bad attitudes and practices towards rabies. The former, had more gaps in their attitudes and practices towards the disease. Village location and education level ( P < .05) and similarly, sex and occupation, were found to be statistically associated with good knowledge of rabies among households as compared to HPs. Overall, a lack of community-based education and professional retraining courses contribute significantly to poor awareness of rabies in the LNP of Mozambique. Enhancing public health knowledge should consequently reduce dog-mediated human rabies deaths in this country.

          Author summary

          In Mozambique, rabies is maintained primarily by the domestic dog, the principal vector and host species responsible for the majority of human cases dating back to the early 1900s. Control of animal rabies has historically been undertaken by government veterinary authorities, with limited involvement of the health and environment sectors. In the Massingir District in general, and in Limpopo National Park (LNP) in particular, parenteral dog rabies mass-vaccination campaigns and the provision of post-exposure prophylaxis are inconsistent. Limited resources for dog vaccination campaigns, insufficient veterinary field staff, inefficient disease notification procedures and inadequate training of health practitioners constraint effective rabies control across the country. Awareness of good practices regarding management of bite wounds among local community members and health practitioners is crucial to reducing rabies deaths. The results obtained in this study will inform government policy on practical interventions in the control of dog and human rabies.

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          Most cited references67

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          Estimating the Global Burden of Endemic Canine Rabies

          Background Rabies is a notoriously underreported and neglected disease of low-income countries. This study aims to estimate the public health and economic burden of rabies circulating in domestic dog populations, globally and on a country-by-country basis, allowing an objective assessment of how much this preventable disease costs endemic countries. Methodology/Principal Findings We established relationships between rabies mortality and rabies prevention and control measures, which we incorporated into a model framework. We used data derived from extensive literature searches and questionnaires on disease incidence, control interventions and preventative measures within this framework to estimate the disease burden. The burden of rabies impacts on public health sector budgets, local communities and livestock economies, with the highest risk of rabies in the poorest regions of the world. This study estimates that globally canine rabies causes approximately 59,000 (95% Confidence Intervals: 25-159,000) human deaths, over 3.7 million (95% CIs: 1.6-10.4 million) disability-adjusted life years (DALYs) and 8.6 billion USD (95% CIs: 2.9-21.5 billion) economic losses annually. The largest component of the economic burden is due to premature death (55%), followed by direct costs of post-exposure prophylaxis (PEP, 20%) and lost income whilst seeking PEP (15.5%), with only limited costs to the veterinary sector due to dog vaccination (1.5%), and additional costs to communities from livestock losses (6%). Conclusions/Significance This study demonstrates that investment in dog vaccination, the single most effective way of reducing the disease burden, has been inadequate and that the availability and affordability of PEP needs improving. Collaborative investments by medical and veterinary sectors could dramatically reduce the current large, and unnecessary, burden of rabies on affected communities. Improved surveillance is needed to reduce uncertainty in burden estimates and to monitor the impacts of control efforts.
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            Emerging infectious diseases of wildlife--threats to biodiversity and human health.

            Emerging infectious diseases (EIDs) of free-living wild animals can be classified into three major groups on the basis of key epizootiological criteria: (i) EIDs associated with "spill-over" from domestic animals to wildlife populations living in proximity; (ii) EIDs related directly to human intervention, via host or parasite translocations; and (iii) EIDs with no overt human or domestic animal involvement. These phenomena have two major biological implications: first, many wildlife species are reservoirs of pathogens that threaten domestic animal and human health; second, wildlife EIDs pose a substantial threat to the conservation of global biodiversity.
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              The Feasibility of Canine Rabies Elimination in Africa: Dispelling Doubts with Data

              Introduction Rabies is a viral zoonosis caused by negative-stranded RNA viruses from the Lyssavirus genus. Genetic variants of the genotype 1 Lyssavirus (the cause of classical rabies) are maintained in different parts of the world by different reservoir hosts within ‘host-adaptive landscapes’ [1]. Although rabies can infect and be transmitted by a wide range of mammals, reservoirs comprise only mammalian species within the Orders Carnivora (e.g. dogs, raccoons, skunks, foxes, jackals) and Chiroptera (bats). From the perspective of human rabies, the vast majority of human cases (>90%) result from the bites of rabid domestic dogs [2] and occur in regions where domestic dogs are the principal maintenance host [3]. Over the past three decades, there have been marked differences in efforts to control canine rabies. Recent successes have been demonstrated in many parts of central and South America, where canine rabies has been brought under control through large-scale, synchronized mass dog vaccination campaigns [4]. As a result, not only has dog rabies declined, but human rabies deaths have also been eliminated, or cases remain highly localized [5]. The contrast with the situation in Africa and Asia is striking; here, the incidence of dog rabies and human rabies deaths continue to escalate, and new outbreaks have been occurring in areas previously free of the disease (e.g. the islands of Flores and Bali in Indonesia – [6]; http://wwwn.cdc.gov/travel/contentRabiesBaliIndonesia2008.aspx). In this paper, we identify four major reasons commonly given for the lack of effective domestic dog rabies control including (1) low prioritisation, (2) epidemiological constraints, (3) operational constraints and (4) lack of resources (Table 1), focussing on the situation in Africa. We address each of these issues in turn, using outputs from modelling approaches and data from field studies to demonstrate that there are no insurmountable logistic, practical, epidemiological, ecological or economic obstacles. As a result, we conclude that the elimination of canine rabies is a feasible objective for much of Africa and there should be no reasons for further delay in preventing the unnecessary tragedy of human rabies deaths. 10.1371/journal.pntd.0000626.t001 Table 1 Reasons commonly given for the lack of effective dog rabies control. Reason Explanation Oral evidence Published evidence LOW PRIORITISATION Lack of accurate data on the disease burden and low recognition among public health practitioners and policy makers; lack of inclusion of rabies in global surveys of disease burden; only recent recognition of rabies as a neglected tropical disease; statements of rabies as an ‘insignificant human disease’ Ministries of Health; statements by doctors and health workers; WHO (up until 2007) I-VI* EPIDEMIOLOGICAL CONSTRAINTS Abundance of wild animals and uncertainties about the required levels of vaccination coverage SEARG meetings, scientific meetings, national veterinary meetings; statements from district veterinary officers and local communities; draft rabies control policies VII-XIX OPERATIONAL CONSTRAINTS Perception of existence of many inaccessible stray/ownerless dogs SEARG meetings, inter-ministerial meetings, national veterinary meetings; statements from district veterinary and medical officers, and livestock officers; draft rabies control policies; international organizations XX-XXVIII Owners unwilling or unable to bring dogs for vaccination SEARG meetings, inter-ministerial meetings, national veterinary meetings, scientific meetings; statements by veterinary and livestock officers XXIX,XXX Insufficient knowledge of dog population size and ecology SEARG meetings, inter-ministerial meetings, scientific meetings; statements from veterinary and livestock officers and wildlife authorities; draft rabies control policies; international organizations XIV,XXIV,XXXI LACK OF RESOURCES Weak surveillance and diagnostic capacity SEARG meetings, inter-ministerial meetings; international and national reference laboratories; international organizations VI,XXIII,XXIV,XXXII-XXXVIII Insufficient resources available to veterinary services SEARG meetings, inter-ministerial meetings, scientific meetings, national veterinary meetings; statements from politicians, veterinary authorities, local communities, wildlife authorities; international organizations; media XXVI,XXXIV,XXXVII,XXXIX,XL-XLIII SEARG = Southern and Eastern Africa Rabies Group. *Including indirect evidence (e.g. absence of any mention of rabies in published literature indicating lack of priority). See Appendix S1 for references. Methods This paper compiles previously published data (see references below) and additional analyses of those data, but we present a brief summary of the data collection methods below. Hospital records of animal-bite injuries compiled from northwest Tanzania were used as primary data sources. These data informed a probability decision tree model for a national disease burden evaluation [7], which has since been adapted for global estimates of human rabies deaths and Disability-Adjusted Life Years (DALYs) lost due to rabies [3], a standardized measure for assessing disease burden [8],[9]. Hospital records were also used to initiate contact tracing studies [10]–[12], whereby bite-victims were interviewed to obtain more detail on the source and severity of exposure and actions taken, allowing subsequent interviews with other affected individuals (not documented in hospital records) including owners of implicated animals. Statistical techniques applied to these data for estimating epidemiological parameters and inferring transmission links are described elsewhere [10],[12]. Rabies monitoring operations including passive and active surveillance involving veterinarians, village livestock field officers, paravets, rangers and scientists were used to collect samples from carcasses (domestic dogs and wildlife whenever found), which were subsequently tested and viral isolates were sequenced [10], [13]–[16], with results being used to inform estimates of rabies-recognition probabilities [7] and for phylogenetic analyses [10],[16]. Operational research on domestic dog vaccination strategies was carried out in a variety of settings [14],[17]. Household interviews were also used for socio-economic surveys and to evaluate human:domestic dog ratios, levels of vaccination coverage achieved and reasons for not bringing animals to vaccination stations [17],[18]. The study was approved by the Tanzania Commission for Science and Technology with ethical review from the National Institute for Medical Research (NIMR). This retrospective study involved collection of interview data only, without clinical intervention or sampling, therefore we considered that informed verbal consent was appropriate and this was approved by NIMR. Permission to conduct interviews was obtained from district officials, village and sub-village leaders in all study locations. At each household visited, the head of the household was informed about the purpose of the study and interviews were conducted with verbal consent from both the head of the household and the bite victim (documented in a spreadsheet). Approval for animal work was obtained from the Institutional Animal Care and Use Committee (IACUC permit #0107A04903). Results/Discussion (a) There is not enough evidence to define rabies control as a priority A principal factor contributing to a low prioritization of rabies control has been the lack of information about the burden and impact of the disease [19],[20]. Data on human rabies deaths, submitted from Ministries of Health to the World Health Organization (WHO), are published in the annual World Surveys of Rabies and through the WHO Rabnet site (www.who.int/rabies/rabnet/en). For the WHO African region (AFRO) comprising 37 countries, these surveys report an average of 162 human deaths per year between 1988 and 2006. It is therefore unsurprising that for national and international policy-makers, rabies pails into insignificance in comparison with other major disease problems. This perceived lack of significance of human rabies is reflected in the absence of any mention of rabies in either of the two published Global Burden of Disease Surveys [21],[22], which assessed more than 100 major diseases. These surveys adopted the metric of the DALY which is widely used as the principal tool for providing consistent, comparative information on disease burden for policy-making. Until recently no estimates of the DALY burden were available for rabies. Official data on human rabies deaths submitted to WHO from Africa are widely recognized to greatly under-estimate the true incidence of disease. The reasons for this are manifold: (1) rabies victims are often too ill to travel to hospital or die before arrival, (2) families recognize the futility of medical treatment for rabies, (3) patients are considered to be the victims of bewitchment rather than disease, (4) clinically recognized cases at hospitals may go unreported to central authorities, and (5) misdiagnosis is not uncommon. The problems of misdiagnosis were highlighted by a study of childhood encephalitis in Malawi, in which 3/26 (11.5%) cases initially diagnosed as cerebral malaria were confirmed as rabies through post-mortem tests [23]. Several recent studies have contributed information that consistently demonstrates that the burden of canine rabies is not insubstantial. Human rabies deaths Estimates of human rabies cases from modeling approaches, using the incidence of dog-bite injuries and availability of rabies post-exposure prophylaxis (PEP), indicate that incidence in Africa is about 100 times higher than officially reported, with ∼24,000 deaths in Africa each year [3],[7]. Consistent figures have subsequently been generated from detailed contact-tracing data: in rural Tanzanian communities with sporadic availability of PEP (a typical scenario in developing countries), human rabies deaths occur at an incidence of ∼1–5 cases/100,000/year (equivalent to 380–1,900 deaths per year for Tanzania) [11]. Similarly, a multi-centric study from India reported 18,500 human rabies deaths per year [24], consistent with model outputs of 19,700 deaths for India [3]. A crude comparison of annual human deaths for a range of zoonotic diseases is shown in Figure 1 (top). While diseases such as Severe Acute Respiratory Syndrome (SARS), Rift Valley Fever and highly pathogenic avian influenza cause major concerns as a result of pandemic potential and economic losses, these figures provide a salutary reminder of the recurrent annual mortality of rabies and other neglected zoonoses, such as leishmaniasis and Human African Trypanosomiasis (HAT). Decision-tree models applied to data from East Africa and globally indicate that the DALY burden for rabies exceeds that of most other neglected zoonotic diseases (Figure 1 - bottom) [3],[25],[26]. 10.1371/journal.pntd.0000626.g001 Figure 1 Annual human deaths for a range of zoonoses and global disability-adjusted life years (DALYs) scores for neglected zoonoses. Top figure - Numbers of human deaths per year for rabies compared with peak annual deaths from selected epidemic zoonoses (Severe Acute Respiratory Syndrome, SARS, 2003; H5N1, 2006; Nipah, 1999; and Rift Valley Fever 2007). Data sources: Rabies (LVII), Leishmaniasis, Human African Trypanosomiasis (HAT), Chagas Disease and Japanese Encephalitis (LVIII), SARS (LIX), Influenza A H5N1 (LX), Nipah (LXI), Rift Valley Fever (LXII,LXIII). See Appendix S1 for references. Bottom figure - Global DALY scores for neglected tropical diseases reported in LXIV and LVII and also assuming no post-exposure treatment (dark grey). See Appendix S1 for references. Human animal-bite injuries and morbidity Most of the rabies DALY burden is attributed to deaths, rather than morbidity because of the short duration of clinical disease. The DALY burden for rabies is particularly high, because most deaths occur in children and therefore a greater number of years of life are lost [25],[27]. DALY estimates incorporate non-rabies mortality and morbidity in terms of adverse reactions to nerve-tissue vaccines (NTVs) [3], which are still widely used in some developing countries such as Ethiopia, however rabies also causes substantial ‘morbidity’ as a direct result of injuries inflicted by rabid animals, and this is not included in DALY estimates. Contact-tracing studies suggest an incidence as high as 140/100,000 bites by suspected rabid animals in rural communities of Tanzania [11]. Thus, for every human rabies death there are typically more than ten other rabid animal-bite victims who do not develop signs of rabies, because they obtain PEP (Figure 1 - bottom) or are simply fortunate to remain healthy. The severity of wounds has not yet been quantified, but case-history interviews suggest that injuries often involve multiple, penetrating wounds that require medical treatment. Economic burden The major component of the economic burden of rabies relates to high costs of PEP, which impacts both government and household budgets. With the phasing out of NTVs, many countries spend millions of dollars importing supplies of tissue-culture vaccine (∼$196 million USD pa [3]). At the household level, costs of PEP arise directly from anti-rabies vaccines and from high indirect (patient-borne) costs associated with travel (particularly given the requirement of multiple hospital visits), medical fees and income loss [3],[28]. Indirect losses, represent >50% of total costs (Figure 2). Total costs have been estimated conservatively at $40 US per treatment in Africa and $49 US in Asia accounting respectively for 5.8% and 3.9% of annual per capita gross national income [3]. Poor households face difficulties raising funds which results in considerable financial hardship and substantial delays in PEP delivery [11],[28]. Shortages of PEP, which are frequent in much of Africa, further increase costs as bite victims are forced to travel to multiple centres to obtain treatment, also resulting in risky delays [11]. 10.1371/journal.pntd.0000626.g002 Figure 2 Economic burden of canine rabies (data source: LVII in Appendix S1). PET, Post-exposure treatment. Additional economic losses relate to livestock losses derived from an incidence of 5 deaths/100,000 cattle estimated to cost $12.3 million annually in Africa and Asia [3]. However, substantially higher incidence has been recorded in Tanzania, with 12–25 cases/100,000 cattle reported annually in rural communities (Hampson, unpublished). Canine rabies introduced from sympatric domestic dog populations is also recognized as a major threat to endangered African wild dogs (Lycaon pictus) and Ethiopian wolves (Canis simensis) [29]–[32]. Potential losses of tourism revenue may be substantial; African wild dogs are a major attraction in South Africa National Parks with the value of a single pack estimated at $9,000 per year [33] and Ethiopian wolves are a flagship species for the Bale Mountains National Park. Psychological impact An important, but often under-appreciated component of disease burden is the psychological impact on bite-victims and their families. In rural Tanzania, >87% of households with dog bite victims feared a bite from a suspected rabid animal more than malaria [28] because malaria can be treated whereas clinical rabies is invariably fatal and malaria treatment is generally affordable and available locally in comparison to PEP. When human rabies cases occur, the horrifying symptoms and invariably fatal outcome result in substantial trauma for families, communities and health care workers [34]. (b) Epidemiological constraints Increasing incidence of rabies in Africa has prompted concerns that the epidemiology of the disease may be more complex, involving abundant wildlife carnivores that may sustain infection cycles [13], [35]–[38]. There is also uncertainty about the level of vaccination coverage needed to control rabies particularly in rapidly growing domestic dog populations [39],[40]. To eliminate infection, disease control efforts need to be targeted at the maintenance population [41]. This is clearly demonstrated for fox rabies in Western Europe, whereby control of rabies in foxes (through mass oral vaccination) has led to the disappearance of rabies from all other ‘spill-over’ hosts [42]. Despite the predominance of domestic dog rabies in Africa, the role of wildlife as independent maintenance hosts has been debated, and many perceive the abundance of wildlife as a barrier to elimination of canine rabies on the continent. It has also been argued that the predominance of dog rabies is an artefact of poor surveillance and under-reporting in wildlife populations [43]. In the wildlife-rich Serengeti ecosystem in Tanzania, evidence suggests that domestic dogs are the only population essential for maintenance [10],[13],[16]: (1) phylogenetic data showed only a single southern Africa canid-associated variant (Africa 1b) circulating among different hosts [16]; (2) transmission networks suggested that, for wildlife hosts, within-species transmission cannot be sustained [16]; and (3) statistical inference indicated that cross-species transmission events from domestic dogs resulted in only relatively short-lived chains of transmission in wildlife with no evidence for persistence [10]. The conclusion that domestic dogs are the only maintenance population in such a species-rich community suggests that elimination of canine rabies through domestic dog vaccination is a realistic possibility, and provides grounds for optimism for wider-scale elimination efforts in Africa. In other parts of central and west Africa, transmission of rabies appears to be driven by domestic dogs [44]. An outstanding question relates to southern Africa. Earlier and recent evidence indicate that jackal species (Canis mesomelas and C. adustus) and bat-eared foxes (Otocyon megalotis) may maintain the canid variant in specific geographic loci in South Africa and Zimbabwe [2], [36]–[38], [45]–[50], but it is still not clear whether these cycles can be sustained over large spatial and temporal scales in the absence of dog rabies [13],[51],[52]. Independent wildlife cycles may preclude continent-wide elimination of this variant through dog vaccination alone and wildlife rabies control strategies, in conjunction with dog vaccination, may need to be considered in specific locations [38]. A critical proportion of the population must be protected (Pcrit) to eliminate infection and this threshold can be calculated from the basic reproductive number (R0, defined as the average number of secondary infections caused by an infected individual in a susceptible population) [53]. Vaccinating a large enough proportion of the population to exceed Pcrit will not only protect the vaccinated individuals but will reduce transmission such that, on average, less than one secondary infection will result from each primary case (effective reproductive number, Re 80% coverages can still be achieved through house-to-house delivery strategies or community-based animal health workers [17]. Young pups usually make up a large proportion (>30%) of African dog populations [62] and there is a widespread perception among veterinary authorities and dog owners that they should not be vaccinated, which leads to insufficient coverage [17]. However, rabies vaccines can safely be administered to pups 0.5 IU/ml) of rabies virus neutralizing antibody [64]. The issue of inclusion of pups can effectively be addressed through appropriate advertising before campaigns. Cost-recovery, through charging dog owners for rabies vaccination, is widely promoted for sustainable programmes and to encourage responsible dog ownership. However, charging for a vaccination that represents a public rather than a private good, can be counterproductive, resulting in low turnouts and coverage ( 600,000 PEP courses per year at an estimated cost of ∼$27 million/year [84]. Although domestic dog populations need to be targeted for the effective control of rabies, this is usually deemed to be the responsibility of veterinary services even though many of the benefits accrue to the medical sector. In rural Tanzania, dog vaccination campaigns led to a rapid and dramatic decline in demand for costly human PEP [14]. In pastoral communities, vaccination not only reduced rabies incidence, but has now resulted in a complete absence of exposures reported in local hospitals for over two years (Figure 4). 10.1371/journal.pntd.0000626.g004 Figure 4 Number of cases of bite injuries reported to hospitals in pastoralist communities to the east of Serengeti National Park (north-western Tanzania). Numbers are recorded as a result of bites from both rabid and normal healthy animals as well as those of unknown status (either the bite victims could not be traced, or insufficient information could be obtained during interviews to make an informed judgement about the health of the biting animal). The arrows mark the end of successive dog vaccination campaigns. Large-scale campaigns can therefore translate into human lives and economic savings through reduced demand for PEP. Costs per dog vaccinated are generally estimated to be low (rural Tanzania ∼$1.73 [17], Philippines ∼$1.19–4.27 [85], Tunisia ∼$1.3 [86], Thailand ∼$1.3 [86] and Urban Chad ∼$1.8 [87]) and preliminary studies suggest that including dog vaccination in human rabies prevention strategies would be a highly cost-effective intervention at ∼US $25/DALY averted (S. Cleaveland, unpublished data; see also 82). Developing joint financing schemes for rabies prevention and control across medical and veterinary sectors would provide a mechanism to use savings in human PEP to sustain rabies control programs in domestic dogs. Although conceptually simple, the integration of budgets across different Ministries is likely to pose political and administrative challenges. However, given sufficient political will and commitment, developing sustained programmes of dog vaccination that result in canine rabies elimination should be possible. In conclusion, here we show that a substantial body of epidemiological data have now been gathered through multiple studies demonstrating that: (1) rabies is an important disease that exerts a substantial burden on human and animal health, local and national economies and wildlife conservation, (2) domestic dogs are the sole population responsible for rabies maintenance and main source of infection for humans throughout most of Africa and Asia and therefore control of dog rabies should eliminate the disease, (3) elimination of rabies through domestic dog vaccination is epidemiologically feasible, (4) the vast majority of domestic dog populations across sub-Saharan Africa are accessible for vaccination and the few remaining factors compromising coverage can be addressed by engaging communities through education and awareness programs, (5) new diagnostic and surveillance approaches will help evaluate the impact of interventions and focus efforts towards elimination, and (6) dog rabies control is affordable, but is likely to require intersectoral approaches for sustainable programmes that will be needed to establish rabies-free areas. Supporting Information Appendix S1 Appendix with additional references. (0.07 MB DOC) Click here for additional data file.
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                Contributors
                Role: ConceptualizationRole: InvestigationRole: Writing – original draftRole: Writing – review & editing
                Role: ConceptualizationRole: Formal analysisRole: SupervisionRole: Writing – review & editing
                Role: Funding acquisitionRole: Project administrationRole: SupervisionRole: Writing – review & editing
                Role: ConceptualizationRole: Data curationRole: Formal analysisRole: MethodologyRole: SupervisionRole: ValidationRole: Writing – review & editing
                Role: Editor
                Journal
                PLoS Negl Trop Dis
                PLoS Negl Trop Dis
                plos
                PLoS Neglected Tropical Diseases
                Public Library of Science (San Francisco, CA USA )
                1935-2727
                1935-2735
                7 March 2022
                March 2022
                : 16
                : 3
                : e0010202
                Affiliations
                [1 ] Veterinary Faculty, University Eduardo Mondlane, Maputo, Mozambique
                [2 ] Agricultural Research Council-Onderstepoort Veterinary Institute, OIE Rabies Reference Laboratory, Pretoria, South Africa
                [3 ] Centre of Biotechnology (CB-UEM), Maputo, Mozambique
                [4 ] Centre for Veterinary Wildlife Studies, University of Pretoria, Pretoria, South Africa
                [5 ] Aberystwyth School of Veterinary Science, Institute of Biological, Environmental and Rural Sciences, Aberystwyth University, Aberystwyth, United Kingdom
                University of Surrey, UNITED KINGDOM
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                The authors have declared that no competing interests exist.

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                Current address: University of Pretoria, Department of Veterinary Tropical Diseases, Pretoria, South Africa

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                https://orcid.org/0000-0002-9038-5922
                https://orcid.org/0000-0002-7391-1898
                Article
                PNTD-D-20-01733
                10.1371/journal.pntd.0010202
                8929695
                35255083
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                © 2022 Mapatse et al

                This is an open access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.

                History
                : 29 September 2020
                : 25 January 2022
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                Figures: 3, Tables: 7, Pages: 23
                Funding
                Funded by: Belgian Directorate General for Development C/Institute of Tropical Medicine
                Award ID: FA 3 III DGD/ITM
                This work was supported by the Third Framework Agreement phase III “FA 3 III DGD/ITM (Belgian Directorate General for Development C/Institute of Tropical Medicine) 2014-2016”: Project Communities on the move: animal and human health challenges, awarded to the Faculty of Veterinary Science, University of Pretoria. The funders had no role in study design, data collection and analysis, decision to publish, or preparation of the manuscript.
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