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Mouliom Mouiche MM, Nguemou Wafo EE, Mpouam SE, Moffo F, Kameni Feussom JM, Njayou Ngapagna A, Mfopit YM, Saegerman C, Abdoulmoumini M. Zoo-Sanitary Situation Assessment, an Initial Step in Country Disease Prioritization Process: Systematic Review and Meta-Analysis from 2000 to 2020 in Cameroon. Pathogens 2023; 12:1076. [PMID: 37764884 PMCID: PMC10537522 DOI: 10.3390/pathogens12091076] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2023] [Revised: 08/09/2023] [Accepted: 08/15/2023] [Indexed: 09/29/2023] Open
Abstract
To prevent and/or control infectious diseases in animal and human health, an appropriate surveillance system based on suitable up-to-date epidemiological data is required. The systematic review protocol was designed according to the PRISMA statement to look at the available data on infectious diseases of livestock in Cameroon from 2000-2020. Data were searched through online databases. Grey literature was comprised of dissertations and theses from veterinary higher education institutions in Cameroon. A random-effects model was used to calculate pooled prevalence using Comprehensive Meta-Analysis Software. Based on disease prevalence, major infectious diseases of livestock in Cameroon were gastrointestinal parasitosis (57.4% in cattle, 67.2% in poultry, 88% in pigs), hemoparasites (21.6% in small ruminants, 19.7% in cattle), bovine pasteurellosis (55.5%), fowl salmonellosis (48.2%), small ruminant plague (39.7%), foot-and-mouth disease (34.5% in cattle), and African swine fever (18.9%). Furthermore, other important endemic zoonoses in the country included: Rift Valley fever (10.9% in cattle, 3.7% in small ruminants), brucellosis (7% in cattle, 8% in pigs), bovine tuberculosis (4.7% in cattle), hepatitis E virus (8.4% in pigs) and bovine leptospirosis (2.5%). Most of the retrieved research were carried out in the Adamawa, Northwest, and West regions of Cameroon. The evaluation of existing data as evidence, albeit publication-specific, is an important step towards the process of prioritizing animal diseases, including zoonoses.
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Affiliation(s)
- Mohamed Moctar Mouliom Mouiche
- USAID’s Infectious Disease Detection and Surveillance (IDDS), ICF, Yaoundé P.O. Box 8211, Cameroon;
- School of Veterinary Medicine and Sciences, University of Ngaoundéré, Ngaoundéré P.O. Box 454, Cameroon; (E.E.N.W.); (S.E.M.); (F.M.); (M.A.)
- Epidemiology-Public Health-Veterinary Association (ESPV), Yaoundé P.O. Box 15670, Cameroon; (J.M.K.F.); (A.N.N.)
| | - Eugenie Elvire Nguemou Wafo
- School of Veterinary Medicine and Sciences, University of Ngaoundéré, Ngaoundéré P.O. Box 454, Cameroon; (E.E.N.W.); (S.E.M.); (F.M.); (M.A.)
| | - Serge Eugene Mpouam
- School of Veterinary Medicine and Sciences, University of Ngaoundéré, Ngaoundéré P.O. Box 454, Cameroon; (E.E.N.W.); (S.E.M.); (F.M.); (M.A.)
- Epidemiology-Public Health-Veterinary Association (ESPV), Yaoundé P.O. Box 15670, Cameroon; (J.M.K.F.); (A.N.N.)
- IMMANA Fellow, Friedman School of Nutrition Science and Policy, Tufts University, Boston, MA 02111, USA
| | - Frédéric Moffo
- School of Veterinary Medicine and Sciences, University of Ngaoundéré, Ngaoundéré P.O. Box 454, Cameroon; (E.E.N.W.); (S.E.M.); (F.M.); (M.A.)
| | - Jean Marc Kameni Feussom
- Epidemiology-Public Health-Veterinary Association (ESPV), Yaoundé P.O. Box 15670, Cameroon; (J.M.K.F.); (A.N.N.)
- Ministry of Livestock, Fisheries and Animal Industries (MINEPIA), Yaoundé P.O. Box 8211, Cameroon
| | - Arouna Njayou Ngapagna
- Epidemiology-Public Health-Veterinary Association (ESPV), Yaoundé P.O. Box 15670, Cameroon; (J.M.K.F.); (A.N.N.)
- Unit of Veterinary Public Health and Clinical Sciences, Faculty of Veterinary Medicine, Universite des Montagnes, Bangangté P.O. Box 208, Cameroon
| | - Youssouf Mouliom Mfopit
- Veterinary Research Laboratory, Institute of Agricultural Research for Development, Wakwa Regional Center, Ngaoundéré P.O. Box 65, Cameroon;
| | - Claude Saegerman
- Faculty of Veterinary Medicine, Unit of Epidemiology and Risk Analysis Applied to Veterinary Science (UREAR-ULiège), Fundamental and Applied Research for Animals & Health (FARAH) Center, University of Liege, 4000 Liege, Belgium
| | - Mamoudou Abdoulmoumini
- School of Veterinary Medicine and Sciences, University of Ngaoundéré, Ngaoundéré P.O. Box 454, Cameroon; (E.E.N.W.); (S.E.M.); (F.M.); (M.A.)
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Outbreaks of Foot-and-Mouth Disease in Burundi, East Africa, in 2016, Caused by Different Serotypes. Viruses 2022; 14:v14051077. [PMID: 35632817 PMCID: PMC9143720 DOI: 10.3390/v14051077] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2022] [Revised: 05/05/2022] [Accepted: 05/10/2022] [Indexed: 02/01/2023] Open
Abstract
Burundi is a small, densely populated country in the African Great Lakes region. In March 2016, several hundreds of cattle were reported with vesicular lesions, suggesting foot-and-mouth disease (FMD). Epithelial samples, saliva, and blood were collected in six of the affected provinces spread over the country. The overall seroprevalence of FMD virus (FMDV) in the affected herds, as determined by antibodies against FMDV non-structural proteins, was estimated at 87%. Antibodies against FMDV serotypes O (52%), A (44%), C (19%), SAT1 (36%), SAT2 (58%), and SAT3 (23%) were detected across the provinces. FMDV genome was detected in samples from five of the six provinces using rRT-PCR. FMDV was isolated from samples from three provinces: in Cibitoke province, serotypes A and SAT2 were isolated, while in Mwaro and Rutana provinces, only serotype SAT2 was isolated. In Bururi and Cankuzo provinces, the serological profile suggested a recent incursion with serotype SAT2, while in Bubanza province, the serological profile suggested past incursions with serotype O and possibly serotype SAT1. The phylogenetic assessments showed the presence of topotypes A/Africa/G-I and SAT2/IV, similarly to previously characterized virus strains from other countries in the region, suggesting a transboundary origin and necessitating a regional approach for vaccination and control of FMD.
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Campbell Z, Coleman P, Guest A, Kushwaha P, Ramuthivheli T, Osebe T, Perry B, Salt J. Prioritizing smallholder animal health needs in East Africa, West Africa, and South Asia using three approaches: Literature review, expert workshops, and practitioner surveys. Prev Vet Med 2021; 189:105279. [PMID: 33581421 PMCID: PMC8024747 DOI: 10.1016/j.prevetmed.2021.105279] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2020] [Revised: 12/18/2020] [Accepted: 01/18/2021] [Indexed: 12/15/2022]
Abstract
Managing the health needs of livestock contributes to reducing poverty and improving the livelihoods of smallholder and pastoralist livestock keepers globally. Animal health practitioners, producers, policymakers, and researchers all must prioritize how to mobilize limited resources. This study employed three approaches to prioritize animal health needs in East and West Africa and South Asia to identify diseases and syndromes that impact livestock keepers. The approaches were a) systematic literature review, b) a series of expert workshops, and c) a practitioner survey of veterinarians and para-veterinary professionals. The top constraints that emerged from all three approaches include endo/ ectoparasites, foot and mouth disease, brucellosis, peste des petits ruminants, Newcastle disease, and avian influenza. Expert workshops additionally identified contagious caprine pleuropneumonia, contagious bovine pleuropneumonia, mastitis, and reproductive disorders as constraints not emphasized in the literature review. Practitioner survey results additionally identified nutrition as a constraint for smallholder dairy and pastoralist small ruminant production. Experts attending the workshops agreed most constraints can be managed using existing veterinary technologies and best husbandry practices, which supports a shift away from focusing on individual diseases and new technologies towards addressing systemic challenges that limit access to veterinary services and inputs. Few research studies focused on incidence/ prevalence of disease and impact, suggesting better incorporation of socio-economic impact measures in future research would better represent the interests of livestock keepers.
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Affiliation(s)
- Zoë Campbell
- International Livestock Research Institute (ILRI), P.O. Box 30709, Nairobi, 00100, Kenya.
| | - Paul Coleman
- H20 Venture Partners, 33-35 George Street, Oxford, OX1 2AY, United Kingdom
| | - Andrea Guest
- H20 Venture Partners, 33-35 George Street, Oxford, OX1 2AY, United Kingdom
| | - Peetambar Kushwaha
- GALVmed Asia Office, Unit 118 & 120 B, Splendor Forum, Plot No 3, Jasola District Centre, Jasola, New Delhi, 110025, India
| | - Thembinkosi Ramuthivheli
- GALVmed Africa Office, International Livestock Research Institute (ILRI), Swing One, Naivasha Road, Nairobi, Kenya
| | - Tom Osebe
- GALVmed Africa Office, International Livestock Research Institute (ILRI), Swing One, Naivasha Road, Nairobi, Kenya
| | - Brian Perry
- Nuffield College of Clinical Medicine, University of Oxford, United Kingdom; College of Medicine and Veterinary Medicine, University of Edinburgh, Arthurstone House, Meigle, Blairgowrie, PH12 8QW, Scotland, United Kingdom
| | - Jeremy Salt
- GALVmed UK Office, Doherty Building, Pentlands Science Park, Bush Loan, Penicuik Edinburgh, EH26 0PZ, Scotland, United Kingdom
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van Andel M, Tildesley MJ, Gates MC. Challenges and opportunities for using national animal datasets to support foot-and-mouth disease control. Transbound Emerg Dis 2020; 68:1800-1813. [PMID: 32986919 DOI: 10.1111/tbed.13858] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2020] [Revised: 09/20/2020] [Accepted: 09/21/2020] [Indexed: 11/29/2022]
Abstract
National level databases of animal numbers, locations and movements provide the essential foundations for disease preparedness, outbreak investigations and control activities. These activities are particularly important for managing and mitigating the risks of high-impact transboundary animal disease outbreaks such as foot-and-mouth disease (FMD), which can significantly affect international trade access and domestic food security. In countries where livestock production systems are heavily subsidized by the government, producers are often required to provide detailed animal movement and demographic data as a condition of business. In the remaining countries, it can be difficult to maintain these types of databases and impossible to estimate the extent of missing or inaccurate information due to the absence of gold standard datasets for comparison. Consequently, competent authorities are often required to make decisions about disease preparedness and control based on available data, which may result in suboptimal outcomes for their livestock industries. It is important to understand the limitations of poor data quality as well as the range of methods that have been developed to compensate in both disease-free and endemic situations. Using FMD as a case example, this review first discusses the different activities that competent authorities use farm-level animal population data for to support (1) preparedness activities in disease-free countries, (2) response activities during an acute outbreak in a disease-free country, and (3) eradication and control activities in an endemic country. We then discuss (4) data requirements needed to support epidemiological investigations, surveillance, and disease spread modelling both in disease-free and endemic countries.
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Affiliation(s)
- Mary van Andel
- Ministry for Primary Industries, Operations Branch, Diagnostic and Surveillance Services Directorate, Wallaceville, New Zealand
| | - Michael J Tildesley
- School of Life Sciences, Gibbet Hill Campus, The University of Warwick, Coventry, UK
| | - M Carolyn Gates
- School of Veterinary Science, Massey University, Palmerston North, New Zealand
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van Andel M, Jones G, Buckle K, Phiri B, McFadden A, Dacre I, Bingham P, Heuer C, Abila R, Win HH, Lwin KO, Binney B, Zaari S, Gates MC. Estimating foot-and-mouth disease (FMD) prevalence in central Myanmar: Comparison of village headman and farmer disease reports with serological findings. Transbound Emerg Dis 2019; 67:778-791. [PMID: 31646750 DOI: 10.1111/tbed.13397] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2019] [Revised: 09/09/2019] [Accepted: 10/15/2019] [Indexed: 10/25/2022]
Abstract
The impacts of foot-and-mouth disease (FMD) on food security in developing countries are difficult to quantify due to the scarcity of accurate data on the prevalence and incidence of affected villages. This is partly due to resource constraints as well as the logistical challenges of conducting regular diagnostic testing in remote locations. In this study, we used descriptive analysis and latent class analysis (LCA) models to analyse data collected during a field survey of 160 villages in central Myanmar in the Mandalay and Sagaing Regions over the 2012-2016 time period. We evaluated the performance of verbal reports made by village householders and headmen against serological data to retrospectively determine the FMD-infection status of our study area and to identify factors contributing to under-reporting. Blood samples were collected from approximately 30 cattle per village in both the 6- to 18-month age range and over 18-month age range to distinguish between recent and historic exposure. Village householders were asked to identify pictures of FMD-affected cattle amongst pictures of cattle affected with other common endemic diseases to assess the accuracy of their verbal reporting. The serological results confirmed that FMD is endemic in central Myanmar with village-level seroprevalence estimated at 56% for animals 6-18 months of age and 80% when all age groups were considered together. Most village householders were familiar with the clinical signs of FMD-affected cattle (72%). Based on the results from the LCA models, the village headman had a sensitivity of 77% and specificity of 75% for identifying FMD outbreaks in their village, whereas individual householders had a higher sensitivity and lower specificity of 80% and 56%, respectively. The level of disagreement between the different sources was correlated with the total number of cattle in the village and may potentially be worse in villages where endemic FMD may have led to a high level of natural immunity in cattle and subsequent masking of clinical signs. However, other regional effects such as the intensity of FMD extension efforts cannot be ruled out. Overall, the results suggest that verbal reports of FMD outbreaks from village headmen may be a useful tool to integrate into active FMD surveillance programmes in developing countries.
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Affiliation(s)
- Mary van Andel
- Ministry for Primary Industries, Operations Branch, Diagnostic and Surveillance Services Directorate, Wallaceville, New Zealand
| | - Geoff Jones
- School of Fundamental Sciences, Massey University, Palmerston North, New Zealand
| | - Kelly Buckle
- Ministry for Primary Industries, Operations Branch, Diagnostic and Surveillance Services Directorate, Wallaceville, New Zealand
| | - Ben Phiri
- Ministry for Primary Industries, Operations Branch, Diagnostic and Surveillance Services Directorate, Wallaceville, New Zealand
| | - Andrew McFadden
- Ministry for Primary Industries, Operations Branch, Diagnostic and Surveillance Services Directorate, Wallaceville, New Zealand
| | - Ian Dacre
- OIE Sub-Regional Representation for South East Asia, Bangkok, Thailand
| | - Paul Bingham
- Ministry for Primary Industries, Operations Branch, Diagnostic and Surveillance Services Directorate, Wallaceville, New Zealand
| | - Cord Heuer
- School of Veterinary Science, Massey University, Palmerston North, New Zealand
| | - Ronel Abila
- OIE Sub-Regional Representation for South East Asia, Bangkok, Thailand
| | - Htun Htun Win
- Livestock Breeding and Veterinary Department, Nay Pyi Taw, Myanmar
| | - Khin Ohnmar Lwin
- Livestock Breeding and Veterinary Department, Nay Pyi Taw, Myanmar
| | - Barbara Binney
- Ministry for Primary Industries, Operations Branch, Diagnostic and Surveillance Services Directorate, Wallaceville, New Zealand
| | - Scott Zaari
- OIE Sub-Regional Representation for South East Asia, Bangkok, Thailand
| | - M Carolyn Gates
- School of Veterinary Science, Massey University, Palmerston North, New Zealand
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van Andel M, Zaari S, Bernard P, McFadden A, Dacre I, Bingham P, Heuer C, Binney B, Buckle K, Abila R, Win HH, Lwin KO, Gates MC. Evaluating the utility of national-scale data to estimate the local risk of foot-and-mouth disease in endemic regions. Transbound Emerg Dis 2019; 67:108-120. [PMID: 31408585 DOI: 10.1111/tbed.13329] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2019] [Revised: 08/02/2019] [Accepted: 08/04/2019] [Indexed: 11/29/2022]
Abstract
Knowledge of the distribution of foot-and-mouth disease (FMD) is required if control programmes are to be successful. However, data on the seroprevalence and incidence of affected villages in developing countries with endemic disease are scarce. This is partly due to resource constraints as well as the logistical challenges of conducting intensive surveys and diagnostic testing in remote locations. In this study, we evaluated the performance of low resolution national-scale data against high resolution local survey data to predict the FMD serological status of 168 villages in the Mandalay and Sagaing Regions of central Myanmar using both logistic regression and random forest modelling approaches. Blood samples for ELISA testing were collected from approximately 30 cattle per village in both the 6 to 18 month age range and in the over 18 month age range to distinguish between recent and historical exposure, respectively. The results of the animal level tests were aggregated to the village level to provide the outcome of interest (village positive or not positive for FMD), and three explanatory data sets were constructed: using only nationally available data, using only data collected by survey and using the combined survey and nationally available data. The true seroprevalence of FMD at the village level was 61% when only young animals were included, but increased to 87% when all animals were included. The best performing model was a logistic regression model using the combined national and survey data to predict recent infection in villages. However, this still incorrectly classified 40% of villages, which suggests that using national-level data were not reliable enough for extrapolating seroprevalence in regions where conducting detailed surveys is impractical. Other methods for collected data on FMD such as the use of local reporting should be explored.
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Affiliation(s)
- Mary van Andel
- Ministry for Primary Industries, Operations Branch, Diagnostic and Surveillance Services Directorate, Wallaceville, New Zealand
| | - Scott Zaari
- OIE Sub-Regional Representation for South East Asia, Bangkok, Thailand
| | - Phiri Bernard
- Ministry for Primary Industries, Operations Branch, Diagnostic and Surveillance Services Directorate, Wallaceville, New Zealand
| | - Andrew McFadden
- Ministry for Primary Industries, Operations Branch, Diagnostic and Surveillance Services Directorate, Wallaceville, New Zealand
| | - Ian Dacre
- OIE Sub-Regional Representation for South East Asia, Bangkok, Thailand
| | - Paul Bingham
- Ministry for Primary Industries, Operations Branch, Diagnostic and Surveillance Services Directorate, Wallaceville, New Zealand
| | - Cord Heuer
- School of Veterinary Science, Massey University, Palmerston North, New Zealand
| | - Barbara Binney
- Ministry for Primary Industries, Operations Branch, Diagnostic and Surveillance Services Directorate, Wallaceville, New Zealand
| | - Kelly Buckle
- Ministry for Primary Industries, Operations Branch, Diagnostic and Surveillance Services Directorate, Wallaceville, New Zealand
| | - Ronel Abila
- OIE Sub-Regional Representation for South East Asia, Bangkok, Thailand
| | - Htun Htun Win
- Livestock Breeding and Veterinary Department, Nay Pyi Taw, Myanmar
| | - Khin Ohnmar Lwin
- Livestock Breeding and Veterinary Department, Nay Pyi Taw, Myanmar
| | - M Carolyn Gates
- School of Veterinary Science, Massey University, Palmerston North, New Zealand
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Motta P, Porphyre T, Hamman SM, Morgan KL, Ngwa VN, Tanya VN, Raizman E, Handel IG, Bronsvoort BM. Cattle transhumance and agropastoral nomadic herding practices in Central Cameroon. BMC Vet Res 2018; 14:214. [PMID: 29970084 PMCID: PMC6029425 DOI: 10.1186/s12917-018-1515-z] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2017] [Accepted: 06/05/2018] [Indexed: 11/17/2022] Open
Abstract
BACKGROUND In sub-Saharan Africa, livestock transhumance represents a key adaptation strategy to environmental variability. In this context, seasonal livestock transhumance also plays an important role in driving the dynamics of multiple livestock infectious diseases. In Cameroon, cattle transhumance is a common practice during the dry season across all the main livestock production zones. Currently, the little recorded information of the migratory routes, grazing locations and nomadic herding practices adopted by pastoralists, limits our understanding of pastoral cattle movements in the country. GPS-tracking technology in combination with a questionnaire based-survey were used to study a limited pool of 10 cattle herds from the Adamawa Region of Cameroon during their seasonal migration, between October 2014 and May 2015. The data were used to analyse the trajectories and movement patterns, and to characterize the key animal health aspects related to this seasonal migration in Cameroon. RESULTS Several administrative Regions of the country were visited by the transhumant herds over more than 6 months. Herds travelled between 53 and 170 km to their transhumance grazing areas adopting different strategies, some travelling directly to their destination areas while others having multiple resting periods and grazing areas. Despite their limitations, these are among the first detailed data available on transhumance in Cameroon. These reports highlight key livestock health issues and the potential for multiple types of interactions between transhumant herds and other domestic and wild animals, as well as with the formal livestock trading system. CONCLUSION Overall, these findings provide useful insights into transhumance patterns and into the related animal health implications recorded in Cameroon. This knowledge could better inform evidence-based approaches for designing infectious diseases surveillance and control measures and help driving further studies to improve the understanding of risks associated with livestock movements in the region.
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Affiliation(s)
- Paolo Motta
- The Roslin Institute, Royal (Dick) School of Veterinary Studies, University of Edinburgh, Edinburgh, Easter Bush, Midlothian, EH25 9RG, UK.
- The European Commission for the Control of Foot-and-Mouth Disease (EuFMD) - Food and Agricolture Organization (FAO), Viale delle Terme di Caracalla, 00153, Rome, Italy.
| | - Thibaud Porphyre
- The Roslin Institute, Royal (Dick) School of Veterinary Studies, University of Edinburgh, Edinburgh, Easter Bush, Midlothian, EH25 9RG, UK
| | - Saidou M Hamman
- Institute of Agricultural Research for Development, Regional Centre of Wakwa, Ngaoundere, P.O. Box 454, Cameroon
| | - Kenton L Morgan
- Institute of Ageing and Chronic Disease and School of Veterinary Science, University of Liverpool, Leahurst Campus, Neston, Liverpool, Wirral, CH64 7TE, UK
| | - Victor Ngu Ngwa
- School of Veterinary Medicine and Sciences, University of Ngaoundere, Ngaoundere, P.O. Box 454, Cameroon
| | - Vincent N Tanya
- Cameroon Academy of Sciences, Yaound'e, P.O. Box 1457, Cameroon
| | - Eran Raizman
- Food and Agriculture Organization (FAO), Animal Production and Health Division, Viale delle Terme di Caracalla, 00153, Rome, Italy
| | - Ian G Handel
- Royal (Dick) School of Veterinary Studies, University of Edinburgh, Easter Bush, Edinburgh, Midlothian, EH25 9RG, UK
| | - Barend Mark Bronsvoort
- The Roslin Institute, Royal (Dick) School of Veterinary Studies, University of Edinburgh, Edinburgh, Easter Bush, Midlothian, EH25 9RG, UK
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Souley Kouato B, Thys E, Renault V, Abatih E, Marichatou H, Issa S, Saegerman C. Spatio-temporal patterns of foot-and-mouth disease transmission in cattle between 2007 and 2015 and quantitative assessment of the economic impact of the disease in Niger. Transbound Emerg Dis 2018; 65:1049-1066. [DOI: 10.1111/tbed.12845] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2017] [Indexed: 11/30/2022]
Affiliation(s)
- B. Souley Kouato
- Research Unit in Epidemiology and Risk Analysis Applied to Veterinary Sciences (UREAR-ULg); Fundamental and Applied Research for Animals & Health (FARAH) Centre; Faculty of Veterinary Medicine; University of Liege; Liege Belgium
- Institut National de la Recherche Agronomique du Niger (INRAN); Niamey Niger
| | - E. Thys
- Department of Biomedical Sciences; Institute of Tropical Medicine; Antwerp Belgium
| | - V. Renault
- Research Unit in Epidemiology and Risk Analysis Applied to Veterinary Sciences (UREAR-ULg); Fundamental and Applied Research for Animals & Health (FARAH) Centre; Faculty of Veterinary Medicine; University of Liege; Liege Belgium
| | - E. Abatih
- Department of Applied Mathematics, Computer Science and Statistics; Faculty of Sciences, Ghent University; Ghent Belgium
| | - H. Marichatou
- Faculté d'Agronomie; Université Abdou Moumouni de Niamey; Niamey Niger
| | - S. Issa
- Institut National de la Recherche Agronomique du Niger (INRAN); Niamey Niger
| | - C. Saegerman
- Research Unit in Epidemiology and Risk Analysis Applied to Veterinary Sciences (UREAR-ULg); Fundamental and Applied Research for Animals & Health (FARAH) Centre; Faculty of Veterinary Medicine; University of Liege; Liege Belgium
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Bronsvoort BMD, Handel IG, Nfon CK, Sørensen KJ, Malirat V, Bergmann I, Tanya VN, Morgan KL. Redefining the "carrier" state for foot-and-mouth disease from the dynamics of virus persistence in endemically affected cattle populations. Sci Rep 2016; 6:29059. [PMID: 27381947 PMCID: PMC4933899 DOI: 10.1038/srep29059] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2015] [Accepted: 06/13/2016] [Indexed: 11/09/2022] Open
Abstract
The foot-and-mouth disease virus (FMDV) "carrier" state was defined by van Bekkum in 1959. It was based on the recovery of infectious virus 28 days or more post infection and has been a useful construct for experimental studies. Using historic data from 1,107 cattle, collected as part of a population based study of endemic FMD in 2000, we developed a mixed effects logistic regression model to predict the probability of recovering viable FMDV by probang and culture, conditional on the animal's age and time since last reported outbreak. We constructed a second set of models to predict the probability of an animal being probang positive given its antibody response in three common non-structural protein (NSP) ELISAs and its age. We argue that, in natural ecological settings, the current definition of a "carrier" fails to capture the dynamics of either persistence of the virus (as measured by recovery using probangs) or the uncertainty in transmission from such animals that the term implies. In these respects it is not particularly useful. We therefore propose the first predictive statistical models for identifying persistently infected cattle in an endemic setting that captures some of the dynamics of the probability of persistence. Furthermore, we provide a set of predictive tools to use alongside NSP ELISAs to help target persistently infected cattle.
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Affiliation(s)
- Barend M deC Bronsvoort
- The Roslin Institute at The Royal (Dick) School of Veterinary Studies, University of Edinburgh, East Bush, Midlothian, EH25 9RG, UK
| | - Ian G Handel
- The Roslin Institute at The Royal (Dick) School of Veterinary Studies, University of Edinburgh, East Bush, Midlothian, EH25 9RG, UK
| | - Charles K Nfon
- National Centre for Foreign Animal Disease, Winnipeg, Manitoba, Canada
| | | | - Viviana Malirat
- Pan-American Foot-and-Mouth Disease Center (PAHO/WHO), Rio de Janeiro, Brazil.,Centro de Virología Animal, Instituto de Ciencia y Tecnología Dr. César Milstein, Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET) Buenos Aires, Argentina
| | - Ingrid Bergmann
- Pan-American Foot-and-Mouth Disease Center (PAHO/WHO), Rio de Janeiro, Brazil.,Centro de Virología Animal, Instituto de Ciencia y Tecnología Dr. César Milstein, Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET) Buenos Aires, Argentina
| | | | - Kenton L Morgan
- Institute of Ageing and Chronic Disease, School of Veterinary Science, University of Liverpool, Leahurst Campus, Neston, Wirral, CH64 7TE, UK
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Kelly RF, Hamman SM, Morgan KL, Nkongho EF, Ngwa VN, Tanya V, Andu WN, Sander M, Ndip L, Handel IG, Mazeri S, Muwonge A, Bronsvoort BMDC. Knowledge of Bovine Tuberculosis, Cattle Husbandry and Dairy Practices amongst Pastoralists and Small-Scale Dairy Farmers in Cameroon. PLoS One 2016; 11:e0146538. [PMID: 26745871 PMCID: PMC4706344 DOI: 10.1371/journal.pone.0146538] [Citation(s) in RCA: 35] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2015] [Accepted: 12/18/2015] [Indexed: 11/19/2022] Open
Abstract
BACKGROUND Control of bovine tuberculosis (bTB) and zoonotic tuberculosis (zTB) has relied upon surveillance and slaughter of infected cattle, milk pasteurisation and public health education. In Cameroon, like many other sub-Saharan African countries, there is limited understanding of current cattle husbandry or milk processing practices or livestock keepers awareness of bTB. This paper describes husbandry and milk processing practices within different Cameroonian cattle keeping communities and bTB awareness in comparison to other infectious diseases. STUDY DESIGN A population based cross-sectional sample of herdsmen and a questionnaire were used to gather data from pastoralists and dairy farmers in the North West Region and Vina Division of Cameroon. RESULTS Pastoralists were predominately male Fulanis who had kept cattle for over a decade. Dairy farmers were non-Fulani and nearly half were female. Pastoralists went on transhumance with their cattle and came into contact with other herds and potential wildlife reservoirs of bTB. Dairy farmers housed their cattle and had little contact with other herds or wildlife. Pastoralists were aware of bTB and other infectious diseases such as foot-and-mouth disease and fasciolosis. These pastoralists were also able to identify clinical signs of these diseases. A similar proportion of dairy farmers were aware of bTB but fewer were aware of foot-and-mouth and fasciolosis. In general, dairy farmers were unable to identify any clinical signs for any of these diseases. Importantly most pastoralists and dairy farmers were unaware that bTB could be transmitted to people by consuming milk. CONCLUSIONS Current cattle husbandry practices make the control of bTB in cattle challenging especially in mobile pastoralist herds. Routine test and slaughter control in dairy herds would be tractable but would have profound impact on dairy farmer livelihoods. Prevention of transmission in milk offers the best approach for human risk mitigation in Cameroon but requires strategies that improved risk awareness amongst producers and consumers.
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Affiliation(s)
- Robert F. Kelly
- The Roslin Institute, Royal (Dick) School of Veterinary Studies, University of Edinburgh, Easter Bush, Midlothian, United Kingdom
- Farm Animal Clinical Sciences, School of Veterinary Medicine, University of Glasgow, Glasgow, United Kingdom
| | - Saidou M. Hamman
- Institute of Agricultural Research for Development, Regional Centre of Wakwa, Ngaoundere, Cameroon
| | - Kenton L. Morgan
- Institute of Ageing and Chronic Disease and School of Veterinary Science, University of Liverpool, Leahurst Campus, Neston, Wirral, United Kingdom
| | - Egbe F. Nkongho
- Microbiology and Parasitology Unit, Faculty of Allied Medical Science, University of Calabar, Nigeria
- Tuberculosis Reference Laboratory Bamenda, Hospital Roundabout, Bamenda, Cameroon
| | - Victor Ngu Ngwa
- School of Veterinary Medicine and Sciences, B.P. 454, University of Ngaoundere, Ngaoundere, Cameroon
| | - Vincent Tanya
- Cameroon Academy of Sciences, P.O. Box 1457, Yaoundé, Cameroon
| | - Walters N. Andu
- Ministry of Livestock, Fisheries and Animal Industries, NWR Regional Delegation, Bamenda, Cameroon
| | - Melissa Sander
- Tuberculosis Reference Laboratory Bamenda, Hospital Roundabout, Bamenda, Cameroon
| | - Lucy Ndip
- Laboratory of Emerging Infectious Diseases, University of Buea, Buea, Cameroon
| | - Ian G. Handel
- The Royal (Dick) School of Veterinary Studies, University of Edinburgh, Easter Bush, Midlothian, United Kingdom
| | - Stella Mazeri
- The Roslin Institute, Royal (Dick) School of Veterinary Studies, University of Edinburgh, Easter Bush, Midlothian, United Kingdom
| | - Adrian Muwonge
- The Roslin Institute, Royal (Dick) School of Veterinary Studies, University of Edinburgh, Easter Bush, Midlothian, United Kingdom
| | - Barend M. de. C. Bronsvoort
- The Roslin Institute, Royal (Dick) School of Veterinary Studies, University of Edinburgh, Easter Bush, Midlothian, United Kingdom
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