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Kouengoua APK, Tsissa YL, Noudeke ND, Chimi RN, Njayou A, Youssao AKI, Dahouda M, Boko C, Dougnon V, Awah-Ndukum J, Souaibou F. Prevalence and zoonotic risk factors of Mycobacterium bovis tuberculosis in cattle at the cattle-wildlife-human interface in South and East Cameroon. Vet World 2024; 17:8-16. [PMID: 38406372 PMCID: PMC10884586 DOI: 10.14202/vetworld.2024.8-16] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2023] [Accepted: 11/28/2023] [Indexed: 02/27/2024] Open
Abstract
Background and Aim Bovine tuberculosis (bTB) is a contagious and notifiable disease, which is prevalent in cattle populations of many countries and in several wildlife species worldwide. However, the role of wildlife in the transmission and/or maintenance of bTB at the human-wild animal-animal interface and the epidemiology of zoonotic disease are poorly understood in Cameroon, where many wildlife species exist. This study aimed to estimate the prevalence and zoonotic risk factors of bTB at the cattle-wildlife-human interface in the South and East regions of Cameroon. Materials and Methods We conducted a descriptive cross-sectional study from May to October 2022 in the southern region (Vallée du Ntem and Dja et Lobo) and eastern region (Haut Nyong and Lom et Djérem) of Cameroon to determine risk factors for bTB in Zebu Bororo, Goudali, Ndama, and Simmental cattle breeds. A comparative intradermal tuberculin testing (CIDT) was performed on 160 cattle randomly selected from herds using the threshold recommended by the World Organization for Animal Health. An interviewee-administered questionnaire was used to gather epidemiological data on sociodemographics, interaction between cattle and wildlife, and awareness of zoonotic tuberculosis (TB) from 90 cattle professionals. The prevalence of bTB at the herd level and associated risk factors were estimated using multiple logistic regression models. Results Based on the comparative intradermal tuberculin test (CIDT), the estimated prevalence of bTB in 160 cattle (Zebu Bororo, Goudali, Ndama, and Simmental) in South and East Cameroon was 6.8% (4.35%-9.41%) and 1.8% (0%-3.6%) for threshold values 3 mm and 4 mm, respectively. The prevalence obtained by simple intradermal tuberculin test (IDT) was 0.6% (0%-1.2%) for a threshold value 4 mm. Univariate analysis revealed three risk factors associated with bTB with significant odds ratios (OR; p = 0.05): herd size (OR = 4.88; 95% confidence interval [CI]: 1.24-32.56); cattle aged>10 years (OR = 0.17; 95% CI: 0.05-0.53); and victims of bTB organ seizure (OR = 0.015; 95% CI: 0.002-0.067). Multivariate analysis showed that being a cattle herder and contact between wildlife and livestock due to forage was significantly associated with bTB exposure (adjusted OR = 0.02; p = 0.001). Conclusion Bovine TB is prevalent in cattle of the South and East Cameroon. Comparative IDT of cattle reared in the epidemiological and environmental context of the study areas yielded better results at a threshold of 3 mm than at a threshold of 4 mm recommended by the World Health Organization. Factors associated with exposure to/appearance of bTB were high herd size, cattle aged >10 years old, seizures of tuberculous organs, shepherding as a profession, and contact between cattle and wildlife can be due to lack of forage.
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Affiliation(s)
| | - Yves Ledoux Tsissa
- Department of Veterinary Public Health, Faculty of Veterinary Medicine and Agriculture, Universite des Montagnes Bangangte, Cameroun
| | - Nestor Denakpo Noudeke
- Research Unit on Transmissible Diseases-Ecole Poly Technique, University of Abomey-Calavi, Benin
| | - Roland Nankam Chimi
- Department of Veterinary Public Health, Faculty of Veterinary Medicine and Agriculture, Universite des Montagnes Bangangte, Cameroun
| | - Arouna Njayou
- Department of Biomedical Science, Faculty of Science, University of Ngaoundéré, Cameroon
| | | | - Mahamadou Dahouda
- Research Unit on Transmissible Diseases-Ecole Poly Technique, University of Abomey-Calavi, Benin
| | - Cyrille Boko
- Research Unit on Transmissible Diseases-Ecole Poly Technique, University of Abomey-Calavi, Benin
| | - Victorien Dougnon
- Research Unit in Applied Microbiology and Pharmacology of Natural Substances, University of Abomey-Calavi, Benin
| | - Julius Awah-Ndukum
- Department of Animal Production Technology , College of Technology, University of Bamenda, Cameroon
| | - Farougou Souaibou
- Research Unit on Transmissible Diseases-Ecole Poly Technique, University of Abomey-Calavi, Benin
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2
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Oludele J, Alho P, Chongo I, Maholela P, Magaia V, Muianga A, Melchior B, Isaías T, Gatambire A, Zimba E, Nhavoto E, Notiço P, Inguana P, Cantoria J, António V, Monteiro V, Ali S, Inlamea O, Samo Gudo E. Emerging Zoonotic Diseases among Pastoral Communities of Caia and Búzi Districts, Sofala, Mozambique: Evidence of Antibodies against Brucella, Leptospira, Rickettsia, and Crimean-Congo Hemorrhagic Fever Virus. Viruses 2023; 15:2379. [PMID: 38140620 PMCID: PMC10748219 DOI: 10.3390/v15122379] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2023] [Revised: 09/28/2023] [Accepted: 10/09/2023] [Indexed: 12/24/2023] Open
Abstract
BACKGROUND Emerging zoonotic diseases are an increasing threat to public health. There is little data on the seroprevalence of zoonotic diseases among pastoralists in the country. We aim to carry out a cross-sectional study on the prevalence of major zoonotic diseases among pastoral communities in the Caia and Búzi districts. METHODS Between January and December 2018, a questionnaire was used to solicit socio-demographic data from consenting pastoralists with the collection of blood samples in the Caia and Búzi districts of the Sofala province. All samples were tested using ELISA commercial reagents for the detection of IgM antibodies against Brucella and Leptospira. Likewise, IgM and IgG antibodies against Rickettsia and CCHFV were determined using ELISA kits. RESULTS A total of 218 samples were tested, of which 43.5% (95/218) were from the district of Caia and 56.4% (123/218) from the Búzi district. Results from both districts showed that the seroprevalence of IgM antibodies against Brucella and Leptospira was 2.7% (6/218) and 30.3% (67/218), respectively. Positivity rates for IgM and IgG anti-Rickettsia and CCHFV were 8.7% (19/218), 2.7% (6/218), 4.1% (9/218), and 0.9% (2/218), respectively. CONCLUSIONS Results from our study showed evidence of antibodies due to exposure to Brucella, Leptospira, Rickettsia, and CCHFV with antibodies against Leptospira and Rickettsia being the most prevalent. Hence, laboratory diagnosis of zoonotic diseases is essential in the early detection of outbreaks, the identification of silent transmission, and the etiology of non-febrile illness in a pastoral community. There is a need to develop public health interventions that will reduce the risk of transmission.
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Affiliation(s)
- John Oludele
- Instituto Nacional de Saúde, Marracuene 3943, Mozambique; (P.A.); (I.C.); (P.M.); (A.M.); (B.M.); (T.I.); (A.G.); (E.Z.); (E.N.); (P.N.); (P.I.); (J.C.); (V.A.); (V.M.); (S.A.); (O.I.); (E.S.G.)
| | - Pascoal Alho
- Instituto Nacional de Saúde, Marracuene 3943, Mozambique; (P.A.); (I.C.); (P.M.); (A.M.); (B.M.); (T.I.); (A.G.); (E.Z.); (E.N.); (P.N.); (P.I.); (J.C.); (V.A.); (V.M.); (S.A.); (O.I.); (E.S.G.)
| | - Inocêncio Chongo
- Instituto Nacional de Saúde, Marracuene 3943, Mozambique; (P.A.); (I.C.); (P.M.); (A.M.); (B.M.); (T.I.); (A.G.); (E.Z.); (E.N.); (P.N.); (P.I.); (J.C.); (V.A.); (V.M.); (S.A.); (O.I.); (E.S.G.)
| | - Plácida Maholela
- Instituto Nacional de Saúde, Marracuene 3943, Mozambique; (P.A.); (I.C.); (P.M.); (A.M.); (B.M.); (T.I.); (A.G.); (E.Z.); (E.N.); (P.N.); (P.I.); (J.C.); (V.A.); (V.M.); (S.A.); (O.I.); (E.S.G.)
| | - Vlademiro Magaia
- Centro de Biotecnologia, Universidade Eduardo Mondlane, Maputo CP 257, Mozambique;
| | - Argentina Muianga
- Instituto Nacional de Saúde, Marracuene 3943, Mozambique; (P.A.); (I.C.); (P.M.); (A.M.); (B.M.); (T.I.); (A.G.); (E.Z.); (E.N.); (P.N.); (P.I.); (J.C.); (V.A.); (V.M.); (S.A.); (O.I.); (E.S.G.)
| | - Bibiana Melchior
- Instituto Nacional de Saúde, Marracuene 3943, Mozambique; (P.A.); (I.C.); (P.M.); (A.M.); (B.M.); (T.I.); (A.G.); (E.Z.); (E.N.); (P.N.); (P.I.); (J.C.); (V.A.); (V.M.); (S.A.); (O.I.); (E.S.G.)
| | - Telma Isaías
- Instituto Nacional de Saúde, Marracuene 3943, Mozambique; (P.A.); (I.C.); (P.M.); (A.M.); (B.M.); (T.I.); (A.G.); (E.Z.); (E.N.); (P.N.); (P.I.); (J.C.); (V.A.); (V.M.); (S.A.); (O.I.); (E.S.G.)
| | - Aline Gatambire
- Instituto Nacional de Saúde, Marracuene 3943, Mozambique; (P.A.); (I.C.); (P.M.); (A.M.); (B.M.); (T.I.); (A.G.); (E.Z.); (E.N.); (P.N.); (P.I.); (J.C.); (V.A.); (V.M.); (S.A.); (O.I.); (E.S.G.)
| | - Edna Zimba
- Instituto Nacional de Saúde, Marracuene 3943, Mozambique; (P.A.); (I.C.); (P.M.); (A.M.); (B.M.); (T.I.); (A.G.); (E.Z.); (E.N.); (P.N.); (P.I.); (J.C.); (V.A.); (V.M.); (S.A.); (O.I.); (E.S.G.)
| | - Emídio Nhavoto
- Instituto Nacional de Saúde, Marracuene 3943, Mozambique; (P.A.); (I.C.); (P.M.); (A.M.); (B.M.); (T.I.); (A.G.); (E.Z.); (E.N.); (P.N.); (P.I.); (J.C.); (V.A.); (V.M.); (S.A.); (O.I.); (E.S.G.)
| | - Paulo Notiço
- Instituto Nacional de Saúde, Marracuene 3943, Mozambique; (P.A.); (I.C.); (P.M.); (A.M.); (B.M.); (T.I.); (A.G.); (E.Z.); (E.N.); (P.N.); (P.I.); (J.C.); (V.A.); (V.M.); (S.A.); (O.I.); (E.S.G.)
| | - Pedro Inguana
- Instituto Nacional de Saúde, Marracuene 3943, Mozambique; (P.A.); (I.C.); (P.M.); (A.M.); (B.M.); (T.I.); (A.G.); (E.Z.); (E.N.); (P.N.); (P.I.); (J.C.); (V.A.); (V.M.); (S.A.); (O.I.); (E.S.G.)
| | - Juma Cantoria
- Instituto Nacional de Saúde, Marracuene 3943, Mozambique; (P.A.); (I.C.); (P.M.); (A.M.); (B.M.); (T.I.); (A.G.); (E.Z.); (E.N.); (P.N.); (P.I.); (J.C.); (V.A.); (V.M.); (S.A.); (O.I.); (E.S.G.)
| | - Virgílio António
- Instituto Nacional de Saúde, Marracuene 3943, Mozambique; (P.A.); (I.C.); (P.M.); (A.M.); (B.M.); (T.I.); (A.G.); (E.Z.); (E.N.); (P.N.); (P.I.); (J.C.); (V.A.); (V.M.); (S.A.); (O.I.); (E.S.G.)
| | - Vanessa Monteiro
- Instituto Nacional de Saúde, Marracuene 3943, Mozambique; (P.A.); (I.C.); (P.M.); (A.M.); (B.M.); (T.I.); (A.G.); (E.Z.); (E.N.); (P.N.); (P.I.); (J.C.); (V.A.); (V.M.); (S.A.); (O.I.); (E.S.G.)
| | - Sádia Ali
- Instituto Nacional de Saúde, Marracuene 3943, Mozambique; (P.A.); (I.C.); (P.M.); (A.M.); (B.M.); (T.I.); (A.G.); (E.Z.); (E.N.); (P.N.); (P.I.); (J.C.); (V.A.); (V.M.); (S.A.); (O.I.); (E.S.G.)
- Center for International Health, Division of Infectious Diseases and Tropical Medicine, LMU University Hospital, Ludwig Maximilian University of Munich, 80802 München, Germany
| | - Osvaldo Inlamea
- Instituto Nacional de Saúde, Marracuene 3943, Mozambique; (P.A.); (I.C.); (P.M.); (A.M.); (B.M.); (T.I.); (A.G.); (E.Z.); (E.N.); (P.N.); (P.I.); (J.C.); (V.A.); (V.M.); (S.A.); (O.I.); (E.S.G.)
| | - Eduardo Samo Gudo
- Instituto Nacional de Saúde, Marracuene 3943, Mozambique; (P.A.); (I.C.); (P.M.); (A.M.); (B.M.); (T.I.); (A.G.); (E.Z.); (E.N.); (P.N.); (P.I.); (J.C.); (V.A.); (V.M.); (S.A.); (O.I.); (E.S.G.)
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3
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Müller-Klein N, Risely A, Schmid DW, Manser M, Clutton-Brock T, Sommer S. Two decades of tuberculosis surveillance reveal disease spread, high levels of exposure and mortality and marked variation in disease progression in wild meerkats. Transbound Emerg Dis 2022; 69:3274-3284. [PMID: 35947092 DOI: 10.1111/tbed.14679] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2022] [Revised: 07/20/2022] [Accepted: 07/31/2022] [Indexed: 02/07/2023]
Abstract
Infections with tuberculosis (TB)-causing agents of the Mycobacterium tuberculosis complex threaten human, livestock and wildlife health globally due to the high capacity to cross trans-species boundaries. Tuberculosis is a cryptic disease characterized by prolonged, sometimes lifelong subclinical infections, complicating disease monitoring. Consequently, our understanding of infection risk, disease progression, and mortality across species affected by TB remains limited. The TB agent Mycobacterium suricattae was first recorded in the late 1990s in a wild population of meerkats inhabiting the Kalahari in South Africa and has since spread considerably, becoming a common cause of meerkat mortality. This offers an opportunity to document the epidemiology of naturally spreading TB in a wild population. Here, we synthesize more than 25 years' worth of TB reporting and social interaction data across 3420 individuals to track disease spread, and quantify rates of TB social exposure, progression, and mortality. We found that most meerkats had been exposed to the pathogen within eight years of first detection in the study area, with exposure reaching up to 95% of the population. Approximately one quarter of exposed individuals progressed to clinical TB stages, followed by physical deterioration and death within a few months. Since emergence, 11.6% of deaths were attributed to TB, although the true toll of TB-related mortality is likely higher. Lastly, we observed marked variation in disease progression among individuals, suggesting inter-individual differences in both TB susceptibility and resistance. Our results highlight that TB prevalence and mortality could be higher than previously reported, particularly in species or populations with complex social group dynamics. Long-term studies, such as the present one, allow us to assess temporal variation in disease prevalence and progression and quantify exposure, which is rarely measured in wildlife. Long-term studies are highly valuable tools to explore disease emergence and ecology and study host-pathogen co-evolutionary dynamics in general, and its impact on social mammals.
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Affiliation(s)
- Nadine Müller-Klein
- Conservation Genomics and EcoHealth, Institute for Evolutionary Ecology and Conservation Genomics, Ulm, Germany
| | - Alice Risely
- Conservation Genomics and EcoHealth, Institute for Evolutionary Ecology and Conservation Genomics, Ulm, Germany
| | - Dominik W Schmid
- Conservation Genomics and EcoHealth, Institute for Evolutionary Ecology and Conservation Genomics, Ulm, Germany
| | - Marta Manser
- Department of Evolutionary Biology and Environmental Studies, University of Zurich, Zurich, Switzerland.,Mammal Research Institute, University of Pretoria, Pretoria, South Africa.,Kalahari Research Trust, Kuruman River Reserve, Northern Cape, South Africa
| | - Tim Clutton-Brock
- Mammal Research Institute, University of Pretoria, Pretoria, South Africa.,Kalahari Research Trust, Kuruman River Reserve, Northern Cape, South Africa.,Large Animal Research Group, Department of Zoology, University of Cambridge, Cambridge, UK
| | - Simone Sommer
- Conservation Genomics and EcoHealth, Institute for Evolutionary Ecology and Conservation Genomics, Ulm, Germany
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4
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Woodburn DB, Steyl J, Du Plessis EC, Last RD, Reininghaus B, Mitchell EP. Pathological findings in African buffaloes (Syncerus caffer) in South Africa. J S Afr Vet Assoc 2021; 92:e1-e11. [PMID: 34476957 PMCID: PMC8424707 DOI: 10.4102/jsava.v92i0.2117] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2020] [Revised: 06/04/2021] [Accepted: 06/15/2021] [Indexed: 11/05/2022] Open
Abstract
The African buffalo (Syncerus caffer) is an iconic species of South African megafauna. As the farmed buffalo population expands, the potential impacts on population health and disease transmission warrant investigation. A retrospective study of skin biopsy and necropsy samples from 429 animals was performed to assess the spectrum of conditions seen in buffaloes in South Africa. Determination of the cause of death (or euthanasia) could not be made in 33.1% (136/411) of the necropsy cases submitted due to autolysis or the absence of significant lesions in the samples submitted. Infectious and parasitic diseases accounted for 53.5% (147/275) of adult fatal cases and non-infectious conditions accounted for 34.9% (96/275). Abortions and neonatal deaths made up 11.6% (32/275) of necropsy cases. Rift Valley fever, bovine viral diarrhoea, malignant catarrhal fever, tuberculosis, bacterial pneumonia, anaesthetic deaths, cachexia and hepatotoxic lesions were the most common causes of death. The range of infectious, parasitic and non-infectious diseases to which African buffaloes were susceptible was largely similar to diseases in domestic cattle which supports concerns regarding disease transmission between the two species. The similarity between diseases experienced in both species will assist wildlife veterinarians in the diagnosis and treatment of diseases in captive African buffaloes. The present study likely does not represent accurate disease prevalence data within the source population of buffaloes, and diseases such as anthrax, brucellosis and foot and mouth disease are under-represented in this study. Hepatic ductal plate abnormalities and haemorrhagic septicaemia have not, to our knowledge, been previously reported in African buffaloes.
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Affiliation(s)
- Daniel B Woodburn
- Department of Pathobiology, Zoological Pathology Program, University of Illinois, Illinois.
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Kothowa JP, Mfune RL, Godfroid J, Hang'Ombe BM, Simuunza M, Muma JB. Documenting the absence of bovine brucellosis in dairy cattle herds in the southern region of Malawi and the associated knowledge, attitudes and practices of farmers. J S Afr Vet Assoc 2021; 92:e1-e7. [PMID: 34476956 PMCID: PMC8424705 DOI: 10.4102/jsava.v92i0.2130] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2020] [Revised: 05/30/2021] [Accepted: 06/01/2021] [Indexed: 11/21/2022] Open
Abstract
There is paucity of Brucella prevalence data in Malawi. For this reason, a cross-sectional study was conducted, from 06 January 2020 to 27 February 2020, to estimate the seroprevalence of brucellosis in dairy cattle herds amongst smallholder farmers, government and private dairy farms in the southern region. A total of 529 serum samples were screened for anti-Brucella antibodies using the Rose Bengal test (RBT) and a competitive enzyme-linked immunosorbent assay (cELISA). A pre-tested electronic (Epicollect tool, Wellcome Sanger Institute, United Kingdom) questionnaire was administered to 378 smallholder farmers to assess their knowledge, attitudes and practices towards brucellosis. Descriptive statistics were used to analyse the data in Microsoft Excel® and Statistical Package for Social Sciences (SPSS®) version 21. No animal tested positive for presence of anti-Brucella antibodies, indicating 0% prevalence (individual and herd levels). The majority (94.2%; 95% confidence interval [CI]: 91.8–96.5) of smallholder farmers had never heard about brucellosis. Furthermore, assisting during parturition without protective equipment (41.3%; 95% CI: 36.3–46.2) and using bulls for breeding (75%; 95% CI: 70.2–78.9) were amongst the common risk practices that were identified. We could not detect brucellosis in this study that indicates the disease could be very rare or even absent in the dairy cattle herds of the southern region of Malawi. However, further Brucella studies need to be conducted in cattle, small livestock, wildlife and humans to document the true status of brucellosis in the country. Brucellosis surveillance, monitoring, awareness and preventive measures are required to maintain this favourable situation.
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Affiliation(s)
- John P Kothowa
- Department of Disease Control, School of Veterinary Medicine, University of Zambia, Lusaka, Zambia; and, Department of Animal Health and Livestock Development, Ministry of Agriculture and Food Security, Malawi Government, Lilongwe.
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6
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Shi JF, Gong QL, Zhao B, Ma BY, Chen ZY, Yang Y, Sun YH, Wang Q, Leng X, Zong Y, Li JM, Du R. Seroprevalence of Brucellosis in Buffalo Worldwide and Associated Risk Factors: A Systematic Review and Meta-Analysis. Front Vet Sci 2021; 8:649252. [PMID: 34150882 PMCID: PMC8213021 DOI: 10.3389/fvets.2021.649252] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2021] [Accepted: 05/03/2021] [Indexed: 11/25/2022] Open
Abstract
Background: Brucellosis is an important zoonotic disease caused by Brucella spp. Brucellosis is widely distributed in more than 160 or 170 countries around the world, where it poses a huge threat to animal husbandry and human health. About 150 million head of water buffalo, distributed across more than 40 countries worldwide, are kept for the purposes of service, milk, and meat. High incidence of Brucella spp. in buffalo has negatively affected dairy products and meat products. Results: We searched all research related to seroprevalence of brucellosis in water buffalo anywhere in the world in PubMed, Science Direct, SpringerLink, China National Knowledge Infrastructure, Wanfang Database, and VIP Chinese Journal Databases. A total of 26 articles published from 1985 to 2020 met the final selection criteria. The overall seroprevalence of buffalo brucellosis worldwide was 9.7%. The seroprevalence before 2010 (20.8%) (95% CI: 5.6–42.2) was much higher than the seroprevalence rate from 2010 to 2020 (4.2%) (95% CI: 1.8–7.5). Subgroup analysis by feeding mode found that the point estimate of seroprevalence in stock buffalo (11.5%) (95% CI: 3.6–23.0) was higher than that in captive buffalo (10.6%) (95% CI: 4.9–18.1). Subgroup analysis by farming mode found that the seroprevalence was higher in captive-bred buffalo (10.7%) (95% CI: 6.6–15.7) than in intensively farmed buffalo (8.5) (95% CI: 0.9–22.2). The seroprevalence in buffalo living in dry lands (6.4%) (95% CI: 2.0–12.9) is greater than that in buffalo living in wetlands (5.1%) (95% CI: 1.8–10.4) (P < 0.05). The seroprevalence in female buffalo (10.1%) (95% CI: 3.4–19.7) was higher than that in male buffalo (4.4%) (95% CI: 2.0–7.4). The seroprevalence in lactating buffalo was higher than that in buffalo of other ages (26.9%) (95% CI: 1.8–66.5). Subgroup analysis by detection method found that the seroprevalence detected by the complement fixation test (27.3%) (95% CI: 0.7–70.8) was much higher than that detected by other methods. Conclusion: The results of this meta-analysis showed that buffalo brucellosis infection is very common in buffalo herds around the world. Although the seroprevalence of brucellosis in buffalo and humans is relatively low, serious effects upon animal husbandry and public health make it necessary to take effective control and preventive measures to control the spread of this disease.
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Affiliation(s)
- Jun-Feng Shi
- College of Chinese Medicine Materials, Jilin Agricultural University, Changchun, China.,College of Animal Science and Technology, Jilin Agricultural University, Changchun, China
| | - Qing-Long Gong
- College of Chinese Medicine Materials, Jilin Agricultural University, Changchun, China.,College of Animal Science and Technology, Jilin Agricultural University, Changchun, China
| | - Bo Zhao
- College of Chinese Medicine Materials, Jilin Agricultural University, Changchun, China.,College of Animal Science and Technology, Jilin Agricultural University, Changchun, China
| | - Bao-Yi Ma
- College of Chinese Medicine Materials, Jilin Agricultural University, Changchun, China.,College of Animal Science and Technology, Jilin Agricultural University, Changchun, China
| | - Zi-Yang Chen
- College of Chinese Medicine Materials, Jilin Agricultural University, Changchun, China.,College of Animal Science and Technology, Jilin Agricultural University, Changchun, China
| | - Yang Yang
- College of Chinese Medicine Materials, Jilin Agricultural University, Changchun, China
| | - Yu-Han Sun
- College of Chinese Medicine Materials, Jilin Agricultural University, Changchun, China
| | - Qi Wang
- College of Chinese Medicine Materials, Jilin Agricultural University, Changchun, China.,College of Animal Science and Technology, Jilin Agricultural University, Changchun, China
| | - Xue Leng
- College of Chinese Medicine Materials, Jilin Agricultural University, Changchun, China
| | - Ying Zong
- College of Chinese Medicine Materials, Jilin Agricultural University, Changchun, China
| | - Jian-Ming Li
- College of Chinese Medicine Materials, Jilin Agricultural University, Changchun, China
| | - Rui Du
- College of Chinese Medicine Materials, Jilin Agricultural University, Changchun, China.,Laboratory of Production and Product Application of Sika Deer of Jilin, Jilin Agricultural University, Changchun, China.,Key Lab of Animal Production, Product Quality and Security, Ministry of Education, Jilin Agricultural University, Changchun, China
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7
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Simpson G, Thompson PN, Saegerman C, Marcotty T, Letesson JJ, de Bolle X, Godfroid J. Brucellosis in wildlife in Africa: a systematic review and meta-analysis. Sci Rep 2021; 11:5960. [PMID: 33727580 PMCID: PMC7966391 DOI: 10.1038/s41598-021-85441-w] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2020] [Accepted: 02/28/2021] [Indexed: 01/31/2023] Open
Abstract
This study aimed to consolidate current knowledge of wildlife brucellosis in Africa and to analyse available predictors of infection. The Preferred Reporting Items for Systematic Reviews and Meta-Analyses guidelines were followed. Information on species, test used, test results, area, rainfall, livestock and wildlife contact and year of study were extracted. This systematic review revealed 42 prevalence studies, nine disease control articles and six articles on epidemiology. Brucella abortus, Brucella melitensis, Brucella inopinata and Brucella suis were reported in wildlife. The prevalence studies revealed serological evidence of brucellosis in buffalo, antelope (positive in 14/28 species), carnivores (4/12) and other species (7/20) over the last five decades. Buffalo populations were more likely to be infected and had a higher seroprevalence than other species; the pooled seroprevalence was 13.7% (95% CI 10.3-17.3%) in buffalo, 7.1% (95% CI 1.1-15.5%) in carnivores and 2.1% (95% CI 0.1-4.9%) in antelope. Wildlife in high rainfall areas (≥ 800 mm) were more likely to be infected, and infected populations showed higher seroprevalence in high rainfall areas and in studies published after 2000. Domestic animal contact was associated with increased seroprevalence in antelope and carnivore species, but not in buffalo, supporting the hypothesis that buffalo may be a reservoir species.
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Affiliation(s)
- Gregory Simpson
- Department of Production Animal Studies, Faculty of Veterinary Science, University of Pretoria, Onderstepoort, 0110, South Africa.
- Centre for Veterinary Wildlife Studies, Faculty of Veterinary Science, University of Pretoria, Pretoria, South Africa.
| | - Peter N Thompson
- Department of Production Animal Studies, Faculty of Veterinary Science, University of Pretoria, Onderstepoort, 0110, South Africa
- Centre for Veterinary Wildlife Studies, Faculty of Veterinary Science, University of Pretoria, Pretoria, South Africa
| | - Claude Saegerman
- Department of Infectious and Parasitic Diseases, Fundamental and Applied Research for Animal and Health (FARAH) Centre, Faculty of Veterinary Medicine, University of Liège, Liège, Belgium
| | - Tanguy Marcotty
- Faculty of Science, University of Namur, Namur, Belgium
- Department of Veterinary Tropical Diseases, Faculty of Veterinary Science, University of Pretoria, Pretoria, South Africa
| | | | | | - Jacques Godfroid
- Department of Veterinary Tropical Diseases, Faculty of Veterinary Science, University of Pretoria, Pretoria, South Africa
- Department of Arctic and Marine Biology, Faculty of Biosciences, Fisheries and Economics, UiT, The Arctic University of Norway, Tromsø, Norway
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8
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Inlamea OF, Soares P, Ikuta CY, Heinemann MB, Achá SJ, Machado A, Ferreira Neto JS, Correia-Neves M, Rito T. Evolutionary analysis of Mycobacterium bovis genotypes across Africa suggests co-evolution with livestock and humans. PLoS Negl Trop Dis 2020; 14:e0008081. [PMID: 32119671 PMCID: PMC7077849 DOI: 10.1371/journal.pntd.0008081] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2019] [Revised: 03/17/2020] [Accepted: 01/22/2020] [Indexed: 01/05/2023] Open
Abstract
Mycobacterium bovis is the pathogenic agent responsible for bovine tuberculosis (bTB), a zoonotic disease affecting mostly cattle, but also transmittable to humans and wildlife. Genetic studies on M. bovis allow to detect possible routes of bTB transmission and the identification of genetic reservoirs that may provide an essential framework for public health action. We used a database with 1235 M. bovis genotypes collected from different regions in Africa with 45 new Mozambican samples. Our analyses, based on phylogeographic and population genetics’ approaches, allowed to identify two clear trends. First, the genetic diversity of M. bovis is geographically clustered across the continent, with the only incidences of long-distance sharing of genotypes, between South Africa and Algeria, likely due to recent European introductions. Second, there is a broad gradient of diversity from Northern to Southern Africa with a diversity focus on the proximity to the Near East, where M. bovis likely emerged with animal domestication in the last 10,000 years. Diversity indices are higher in Eastern Africa, followed successively by Northern, Central, Southern and Western Africa, roughly correlating with the regional archaeological records of introduction of animal domesticates. Given this scenario M. bovis in Africa was probably established millennia ago following a concomitant spread with cattle, sheep and goat. Such scenario could translate into long-term locally adapted lineages across Africa. This work describes a novel scenario for the spread of M. bovis in Africa using the available genetic data, opening the field to further studies using higher resolution genomic data. We describe the genetic diversity distribution in Africa of the pathogen Mycobacterium bovis, the responsible for bovine tuberculosis, mostly present in cattle but also transmittable to other animals including humans. This diversity is geographically clustered within the African continent meaning that the genetic diversity was established through independent evolution within different areas. Higher diversity values of M. bovis are found in Eastern and Northern Africa, followed by Central Africa, with Western and Southern Africa displaying the lowest diversity. These levels of diversity correlate well with the introduction of domesticated livestock in the different regions of Africa, following their domestication in the Near East 10,000 ago. We hypothesize that M. bovis emerged in the Near East and it was carried across Africa together with domesticated animals and people that developed herding practices and biological tolerance for digesting milk in adulthood. Such scenario implies a strong evolution and co-evolution of M. bovis across Africa leading to locally adapted strains that could prove a challenge for public health actions.
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Affiliation(s)
- Osvaldo Frederico Inlamea
- Programa de pós-graduação Ciência Para o desenvolvimento (PGCD)–Instituto Gulbenkian de Ciência–Portugal
- Faculdade de Medicina Veterinária e Zootecnia (VPS-FMVZ), Universidade de São Paulo, USP–Brasil
- Instituto Nacional de Saúde, Ministério de Saúde, Moçambique
- Faculdade de Veterinária (FAVET), Universidade Eduardo Mondlane, Maputo, Moçambique
- * E-mail: (OFI); (TR)
| | - Pedro Soares
- Centre of Molecular and Environmental Biology (CBMA), School of Sciences, University of Minho, Braga, Portugal
- Institute of Science and Innovation for Bio-Sustainability (IB-S), University of Minho, Braga, Portugal
| | - Cassia Yumi Ikuta
- Faculdade de Medicina Veterinária e Zootecnia (VPS-FMVZ), Universidade de São Paulo, USP–Brasil
| | - Marcos Bryan Heinemann
- Faculdade de Medicina Veterinária e Zootecnia (VPS-FMVZ), Universidade de São Paulo, USP–Brasil
| | - Sara Juma Achá
- Direcção de Ciências Animais, Instituto de Investigação Agrária de Moçambique, Ministério de Agricultura e Segurança Alimentar, Maputo, Moçambique
| | - Adelina Machado
- Faculdade de Veterinária (FAVET), Universidade Eduardo Mondlane, Maputo, Moçambique
| | | | - Margarida Correia-Neves
- Life and Health Sciences Research Institute (ICVS), School of Medicine, University of Minho, Braga, Portugal
- ICVS/3B's, PT Government Associate Laboratory, Braga/Guimarães, Portugal
| | - Teresa Rito
- Life and Health Sciences Research Institute (ICVS), School of Medicine, University of Minho, Braga, Portugal
- ICVS/3B's, PT Government Associate Laboratory, Braga/Guimarães, Portugal
- * E-mail: (OFI); (TR)
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9
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Muturi M, Bitek A, Mwatondo A, Osoro E, Marwanga D, Gura Z, Ngere P, Nganga Z, Thumbi SM, Njenga K. Risk factors for human brucellosis among a pastoralist community in South-West Kenya, 2015. BMC Res Notes 2018; 11:865. [PMID: 30518420 PMCID: PMC6282298 DOI: 10.1186/s13104-018-3961-x] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2018] [Accepted: 11/29/2018] [Indexed: 12/31/2022] Open
Abstract
Objective Brucellosis is one of the top five priority zoonosis in Kenya because of the socio-economic burden of the disease, especially among traditional, livestock keeping communities. We conducted a 1 year, hospital based, unmatched case–control study to determine risk factors for brucellosis among Maasai pastoralists of Kajiado County in 2016. A case was defined by a clinical criteria; fever or history of fever and two clinical signs suggestive of brucellosis and a positive competitive enzyme-linked immunosorbent assay test (c-ELISA). A control was defined as patients visiting the study facility with negative c-ELISA. Unconditional logistic regression was used to study association between exposure variables and brucellosis using odds ratios (OR) and 95% confidence intervals (CI). Results Forty-three cases and 86 controls were recruited from a population of 4792 individuals in 801 households. The mean age for the cases was 48.7 years while that of the controls was 37.6 years. The dominant gender for both cases (62.7%) and controls (58.1%) groups was female. Regular consumption of un-boiled raw milk and assisting animals in delivery were significantly associated with brucellosis by OR 7.7 (95% CI 1.5–40.1) and OR 3.7 (95% CI 1.1–13.5), respectively.
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Affiliation(s)
- Mathew Muturi
- Kenya Zoonotic Disease Unit-Ministry of Agriculture, Livestock and Fisheries and Ministry of Health, P.O. Box 20811-00202, Nairobi, Kenya.
| | - Austine Bitek
- Food and Agriculture Organization of the United Nations, Nairobi, Kenya
| | - Athman Mwatondo
- Kenya Zoonotic Disease Unit-Ministry of Agriculture, Livestock and Fisheries and Ministry of Health, P.O. Box 20811-00202, Nairobi, Kenya
| | - Eric Osoro
- Paul G. Allen School for Global Animal Health, Washington State University, Pullman, WA, USA
| | | | - Zeinab Gura
- Kenya Field Epidemiology and Laboratory Training Program, Nairobi, Kenya
| | | | - Zipporah Nganga
- Jomo Kenyatta University of Agriculture and Technology, Nairobi, Kenya
| | - S M Thumbi
- Paul G. Allen School for Global Animal Health, Washington State University, Pullman, WA, USA.,Kenya Field Epidemiology and Laboratory Training Program, Nairobi, Kenya
| | - Kariuki Njenga
- Paul G. Allen School for Global Animal Health, Washington State University, Pullman, WA, USA
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10
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Genetic diversity and potential routes of transmission of Mycobacterium bovis in Mozambique. PLoS Negl Trop Dis 2018; 12:e0006147. [PMID: 29346413 PMCID: PMC5772998 DOI: 10.1371/journal.pntd.0006147] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2017] [Accepted: 12/01/2017] [Indexed: 11/18/2022] Open
Abstract
Bovine tuberculosis is a zoonotic disease with largely unknown impact in Africa, with risk factors such as HIV and direct contact with animals or consumption of Mycobacterium bovis infected animal products. In order to understand and quantify this risk and design intervention strategies, good epidemiological studies are needed. Such studies can include molecular typing of M. bovis isolates. The aim of this study was to apply these tools to provide novel information concerning the distribution of bovine tuberculosis in cattle in Mozambique and thereby provide relevant information to guide policy development and strategies to contain the disease in livestock, and reduce the risk associated with transmission to humans. A collection of 178 M. bovis isolates was obtained from cattle in Mozambique. Using spoligotyping and regions of difference analysis, we classified the isolates into clonal complexes, thus reporting the first characterisation of M. bovis strains in this region. Data from MIRU-VNTR typing was used to compare isolates from a number of African countries, revealing a deeply geographically structured diversity of M. bovis. Eastern Africa appears to show high diversity, suggesting deep evolution in that region. The diversity of M. bovis in Africa does not seem to be a function of recent importation of animals, but is probably maintained within each particular region by constant reinfection from reservoir animals. Understanding the transmission routes of M. bovis in Mozambique and elsewhere is essential in order to focus public health and veterinary resources to contain bovine tuberculosis. Bovine tuberculosis is a rather neglected zoonotic disease caused by Mycobacterium bovis that is of global concern owing to the persistence of the bacillus in reservoirs that can spread bovine tuberculosis between animals and humans. Africa remains understudied regarding this pathogen, and should be an area of concern given that in many regions the consumption of raw milk or meat from infected animals persists and the presence of HIV infection renders the population more susceptible. In order to control the disease, we need to understand M. bovis epidemiology, which includes the sources of infection. The important conclusion drawn from the work presented here is that there is a strong association between M. bovis genetic characteristics and geography. This implies that the diversity of M. bovis isolates in Mozambique does not seem to be caused by recent introductions to the territory, but is probably maintained within reservoirs in each particular region.
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11
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Godfroid J. Brucellosis in livestock and wildlife: zoonotic diseases without pandemic potential in need of innovative one health approaches. ACTA ACUST UNITED AC 2017; 75:34. [PMID: 28904791 PMCID: PMC5592711 DOI: 10.1186/s13690-017-0207-7] [Citation(s) in RCA: 62] [Impact Index Per Article: 8.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2017] [Accepted: 06/12/2017] [Indexed: 12/21/2022]
Abstract
Human brucellosis remains the commonest zoonotic disease worldwide with more than 500 000 new cases annually. Understanding the biology of Brucella infections and the transmission patterns at the wildlife/livestock/human interface is of paramount importance before implementing any brucellosis control or eradication program in animals, even more so should interventions be justified within One Health. In addition to calling for transdisciplinary collaboration, One Health formally aims to conserve the environment and to promote the well-being of animals. In this opinion paper, the One Health approach of brucellosis is reviewed in the industrialized and the low and middle income countries, highlighting pitfalls and shortcomings of serological studies and discussing the role of urban and peri-urban farming for the re-emergence of brucellosis in the developing world. The role of wildlife as a potential reservoir is highlighted and different management strategies are discussed. Lastly, beyond its role in the control of brucellosis, the ethical dimension of culling wildlife to control disease emergence or spill-back of infections in livestock is discussed. Core transdisciplinary competencies such as values and ethics are critically important in guiding the development of One Health curricula and in continuing professional education, as they describe the knowledge, skills, and attitudes required to be effective. A conceptual framework needs to be developed from inception to knowledge translation. Importantly, transdisciplinary competencies should be developed as an adjunct to discipline-specific areas of expertise, not as a replacement. A profound understanding of the biology of infectious agents is and will always remain a pre-requisite for any sound One Health approach.
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Affiliation(s)
- Jacques Godfroid
- Department of Arctic and Marine Biology, Research Group of Arctic Infection Biology, University of Tromsø - the Arctic University of Norway, Faculty of Biosciences, Fisheries and Economics, Langnes, Postbox 6050, 9037 Tromsø, Norway
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12
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Rajeev M, Mutinda M, Ezenwa VO. Pathogen Exposure in Cattle at the Livestock-Wildlife Interface. ECOHEALTH 2017; 14:542-551. [PMID: 28470362 DOI: 10.1007/s10393-017-1242-0] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/26/2016] [Accepted: 03/23/2017] [Indexed: 06/07/2023]
Abstract
Land use is an important driver of variation in human infectious disease risk, but less is known about how land use affects disease risk in livestock. To understand how land use is associated with disease risk in livestock, we examined patterns of pathogen exposure in cattle across two livestock ranching systems in rural Kenya: private ranches with low- to medium-intensity cattle production and high wildlife densities, and group ranches with high-intensity cattle production and low wildlife densities. We surveyed cattle from six ranches for three pathogens: Brucella spp., bovine viral diarrhea virus (BVDV) and Leptospira serovar Hardjo. We found that exposure risk for Leptospira was higher on private ranches than on group ranches, but there was no difference in exposure by ranch type for Brucella or BVDV. We hypothesize that variation in livestock and wildlife contact patterns between ranch types may be driving the pattern observed for Leptospira exposure and that the different relationships we found between exposure risk and ranch type by pathogen may be explained by differences in transmission mode. Overall, our results suggest that wildlife-livestock contact patterns may play a key role in shaping pathogen transmission to livestock and that the magnitude of such effects likely depend on characteristics of the pathogen in question.
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Affiliation(s)
- Malavika Rajeev
- Odum School of Ecology, University of Georgia, Athens, GA, 30602-2202, USA
| | | | - Vanessa O Ezenwa
- Odum School of Ecology, University of Georgia, Athens, GA, 30602-2202, USA.
- Department of Infectious Diseases, College of Veterinary Medicine, University of Georgia, Athens, GA, 30602-2202, USA.
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13
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Are brucellosis, Q fever and melioidosis potential causes of febrile illness in Madagascar? Acta Trop 2017; 172:255-262. [PMID: 28502643 DOI: 10.1016/j.actatropica.2017.05.013] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2016] [Revised: 05/09/2017] [Accepted: 05/10/2017] [Indexed: 12/18/2022]
Abstract
Brucellosis, Q fever and melioidosis are zoonoses, which can lead to pyrexia. These diseases are often under-ascertained and underreported because of their unspecific clinical signs and symptoms, insufficient awareness by physicians and public health officers and limited diagnostic capabilities, especially in low-resource countries. Therefore, the presence of Brucella spp., Coxiella burnetii and Burkholderia pseudomallei was investigated in Malagasy patients exhibiting febrile illness. In addition, we analyzed zebu cattle and their ticks as potential reservoirs for Brucella and C. burnetii, respectively. Specific quantitative real-time PCR assays (qPCRs) were performed on 1020 blood samples drawn from febrile patients. In total, 15 samples (1.5%) were Brucella-positive, mainly originating from patients without travel history, while DNA from C. burnetii and Bu. pseudomallei was not detected. Anti-C. burnetii antibodies were found in four out of 201 zebu serum samples (2%), whereas anti-Brucella antibodies could not be detected. Brucella DNA was detected in a single zebu sample. Three out of 330 ticks analyzed (1%) were positively tested for C. burnetii DNA but with high Ct values in the qPCR assay. Our data suggest that zebus as well as Amblyomma and Boophilus ticks have to be considered as a natural reservoir or vector for C. burnetii, but the risk of cattle-to-human transmission is low. Since bovine brucellosis does not seem to contribute to human infections in Madagascar, other transmission routes have to be assumed.
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14
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Abstract
Zoonotic diseases are the main contributor to emerging infectious diseases (EIDs) and present a major threat to global public health. Bushmeat is an important source of protein and income for many African people, but bushmeat-related activities have been linked to numerous EID outbreaks, such as Ebola, HIV, and SARS. Importantly, increasing demand and commercialization of bushmeat is exposing more people to pathogens and facilitating the geographic spread of diseases. To date, these linkages have not been systematically assessed. Here we review the literature on bushmeat and EIDs for sub-Saharan Africa, summarizing pathogens (viruses, fungi, bacteria, helminths, protozoan, and prions) by bushmeat taxonomic group to provide for the first time a comprehensive overview of the current state of knowledge concerning zoonotic disease transmission from bushmeat into humans. We conclude by drawing lessons that we believe are applicable to other developing and developed regions and highlight areas requiring further research to mitigate disease risk.
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15
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Viegas SO, Ghebremichael S, Massawo L, Alberto M, Fernandes FC, Monteiro E, Couvin D, Matavele JM, Rastogi N, Correia-Neves M, Machado A, Carrilho C, Groenheit R, Källenius G, Koivula T. Mycobacterium tuberculosis causing tuberculous lymphadenitis in Maputo, Mozambique. BMC Microbiol 2015; 15:268. [PMID: 26589993 PMCID: PMC4654834 DOI: 10.1186/s12866-015-0603-5] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2015] [Accepted: 11/12/2015] [Indexed: 01/29/2023] Open
Abstract
Background The zoonosis bovine tuberculosis (TB) is known to be responsible for a considerable proportion of extrapulmonary TB. In Mozambique, bovine TB is a recognised problem in cattle, but little has been done to evaluate how Mycobacterium bovis has contributed to human TB. We here explore the public health risk for bovine TB in Maputo, by characterizing the isolates from tuberculous lymphadenitis (TBLN) cases, a common manifestation of bovine TB in humans, in the Pathology Service of Maputo Central Hospital, in Mozambique, during one year. Results Among 110 patients suspected of having TBLN, 49 had a positive culture result. Of those, 48 (98 %) were positive for Mycobacterium tuberculosis complex and one for nontuberculous mycobacteria. Of the 45 isolates analysed by spoligotyping and Mycobacterial Interspersed Repetitive Unit – Variable Number Tandem Repeat (MIRU-VNTR), all were M. tuberculosis. No M. bovis was found. Cervical TBLN, corresponding to 39 (86.7 %) cases, was the main cause of TBLN and 66.7 % of those where from HIV positive patients. We found that TBLN in Maputo was caused by a variety of M. tuberculosis strains. The most prevalent lineage was the EAI (n = 19; 43.2 %). Particular common spoligotypes were SIT 48 (EAI1_SOM sublineage), SIT 42 (LAM 9), SIT 1 (Beijing) and SIT53 (T1), similar to findings among pulmonary cases. Conclusions M. tuberculosis was the main etiological agent of TBLN in Maputo. M. tuberculosis genotypes were similar to the ones causing pulmonary TB, suggesting that in Maputo, cases of TBLN arise from the same source as pulmonary TB, rather than from an external zoonotic source. Further research is needed on other forms of extrapulmonary TB and in rural areas where there is high prevalence of bovine TB in cattle, to evaluate the risk of transmission of M. bovis from cattle to humans. Electronic supplementary material The online version of this article (doi:10.1186/s12866-015-0603-5) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Sofia Omar Viegas
- National Institute of Health, Ministry of Health, Maputo, Mozambique. .,Faculty of Veterinary, Eduardo Mondlane University, Maputo, Mozambique. .,Department of Clinical Science and Education, Karolinska Institutet, Stockholm, Sweden.
| | | | - Leguesse Massawo
- National Institute of Health, Ministry of Health, Maputo, Mozambique.
| | - Matos Alberto
- Pathology Service, Maputo Central Hospital, Ministry of Health, Maputo, Mozambique.
| | - Fabíola Couto Fernandes
- Pathology Service, Maputo Central Hospital, Ministry of Health, Maputo, Mozambique. .,Department of Pathology, Faculty of Medicine, Eduardo Mondlane University, Maputo, Mozambique.
| | - Eliane Monteiro
- Pathology Service, Maputo Central Hospital, Ministry of Health, Maputo, Mozambique.
| | - David Couvin
- WHO Supranational TB Reference Laboratory, Tuberculosis & Mycobacteria Unit, Institut Pasteur de la Guadeloupe, Abymes, Guadeloupe, France.
| | | | - Nalin Rastogi
- WHO Supranational TB Reference Laboratory, Tuberculosis & Mycobacteria Unit, Institut Pasteur de la Guadeloupe, Abymes, Guadeloupe, France.
| | - Margarida Correia-Neves
- Department of Clinical Science and Education, Karolinska Institutet, Stockholm, Sweden. .,Life and Health Sciences Research Institute (ICVS), School of Health Sciences, University of Minho, Braga, Portugal. .,ICVS/3B's, PT Government Associate Laboratory, Braga/Guimarães, Portugal.
| | - Adelina Machado
- Faculty of Veterinary, Eduardo Mondlane University, Maputo, Mozambique.
| | - Carla Carrilho
- Pathology Service, Maputo Central Hospital, Ministry of Health, Maputo, Mozambique. .,Department of Pathology, Faculty of Medicine, Eduardo Mondlane University, Maputo, Mozambique.
| | - Ramona Groenheit
- Department of Microbiology, Public Health Agency of Sweden, Solna, Sweden.
| | - Gunilla Källenius
- Department of Clinical Science and Education, Karolinska Institutet, Stockholm, Sweden.
| | - Tuija Koivula
- Department of Clinical Science and Education, Karolinska Institutet, Stockholm, Sweden. .,Department of Microbiology, Public Health Agency of Sweden, Solna, Sweden.
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16
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Pérez de Val B, Napp S, Velarde R, Lavín S, Cervera Z, Singh M, Allepuz A, Mentaberre G. Serological Follow-up of Tuberculosis in a Wild Boar Population in Contact with Infected Cattle. Transbound Emerg Dis 2015; 64:275-283. [PMID: 25944524 DOI: 10.1111/tbed.12368] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2015] [Indexed: 12/01/2022]
Abstract
There is an increasing concern in several European countries over the role that tuberculosis (TB)-infected wild boar may play in the progress of bovine TB eradication campaigns. In 2004, as a consequence of the detection of a TB focus in wild boar from a National Game Reserve (NGR) located in southern Catalonia, a surveillance programme based on post-mortem inspection for detection of macroscopic TB-like lesions (TBLL) was initiated in the affected area. The source of infection for wild boar was linked to a tuberculous cattle herd located in the same area. Besides, the results of the surveillance programme in wild boar were used for the validation of an indirect enzyme-linked immunosorbent assay (ELISA) specific for Mycobacterium tuberculosis complex (MTBC) IgG antibodies. Using this ELISA, a seven-year serological study of MTBC in wild boar from the NGR was conducted in 173 animals (93 adults, 44 juveniles-yearlings and 36 piglets) culled between 2004 and 2010. ELISA results and presence of TBLL showed excellent agreement for adult and juvenile wild boar (Kappa index = 0.85; 95% CI: 0.76-0.95). Of the thirty-eight adults, yearlings and juveniles classified as positives by the ELISA, 34 (89%) showed TBLL at necropsy. In contrast, none of the ELISA-positive wild boar piglets (n = 20) showed TBLL, suggesting the detection of early antibody responses to the infection. Overall, this study contributes to the knowledge of wild boar humoral responses to MTBC. The results also highlight the usefulness of this serological test for wild boar TB surveillance.
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Affiliation(s)
- B Pérez de Val
- Centre de Recerca en Sanitat Animal (CReSA) - Institut de Recerca i Tecnologia Agroalimentàries (IRTA), Bellaterra, Spain
| | - S Napp
- Centre de Recerca en Sanitat Animal (CReSA) - Institut de Recerca i Tecnologia Agroalimentàries (IRTA), Bellaterra, Spain
| | - R Velarde
- Servei d'Ecopatologia de Fauna Salvatge (SEFaS), Departament de Medicina i Cirurgia Animals, Universitat Autònoma de Barcelona, Bellaterra, Spain
| | - S Lavín
- Servei d'Ecopatologia de Fauna Salvatge (SEFaS), Departament de Medicina i Cirurgia Animals, Universitat Autònoma de Barcelona, Bellaterra, Spain
| | - Z Cervera
- Centre de Recerca en Sanitat Animal (CReSA) - Institut de Recerca i Tecnologia Agroalimentàries (IRTA), Bellaterra, Spain
| | - M Singh
- Lionex Diagnostics and Therapeutics GmbH, Braunschweig, Germany
| | - A Allepuz
- Centre de Recerca en Sanitat Animal (CReSA) - Institut de Recerca i Tecnologia Agroalimentàries (IRTA), Bellaterra, Spain.,Departament de Sanitat i d'Anatomia Animals, Universitat Autònoma de Barcelona, Bellaterra, Spain
| | - G Mentaberre
- Servei d'Ecopatologia de Fauna Salvatge (SEFaS), Departament de Medicina i Cirurgia Animals, Universitat Autònoma de Barcelona, Bellaterra, Spain
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