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Konold T, Dale J, Spiropoulos J, Simmons H, Godinho A. Case of TB in a sheep caused by
Mycobacterium bovis
with transmission to another sheep and a steer in the same building. VETERINARY RECORD CASE REPORTS 2020. [DOI: 10.1136/vetreccr-2020-001151] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
Affiliation(s)
- Timm Konold
- Pathology DepartmentAnimal and Plant Health AgencyAddlestoneSurreyUK
| | - James Dale
- Bacterial Characterisation Group (TB Genotyping)Animal and Plant Health AgencyAddlestoneSurreyUK
| | - John Spiropoulos
- Pathology DepartmentAnimal and Plant Health AgencyAddlestoneSurreyUK
| | - Hugh Simmons
- Pathology DepartmentAnimal and Plant Health AgencyAddlestoneSurreyUK
| | - Ana Godinho
- School of MedicineUniversity of Minho Life and Health Sciences Research InstituteBragaPortugal
- ICVS/3B's‐PT Government Associate LaboratoryUniversidade do Minho Instituto de Investigacao em Ciencias da Vida e SaudeGuimarãesPortugal
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Prevalence of bovine tuberculosis and its associated risk factors in the emerging dairy belts of regional cities in Ethiopia. Prev Vet Med 2019; 168:81-89. [PMID: 31097127 PMCID: PMC10364076 DOI: 10.1016/j.prevetmed.2019.04.010] [Citation(s) in RCA: 30] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2018] [Revised: 03/22/2019] [Accepted: 04/22/2019] [Indexed: 11/23/2022]
Abstract
Bovine tuberculosis (BTB) has become an economically important disease in dairy herds found in and around Addis Ababa City and is emerging in regional cities like Gondar, Hawassa and Mekelle because of the establishment of dairy farms in the milk sheds of these cities. A cross-sectional study to estimate the prevalence of BTB and identify associated risk factors was conducted between February 2016 and March 2017. A total of 174 herds comprising of 2,754 dairy cattle in the cities of Gondar, Hawassa and Mekelle were tested using the Single Intradermal Comparative Cervical Tuberculin (SICCT) test. Data on herd structure, animal origin, body condition, housing condition, farm hygiene, management and biosecurity practices were collected using a pre-tested structured questionnaire. Generalized Linear Models (GLM) and Generalized Linear Mixed Models (GLMM) were used to analyze the herd and animal level risk factors, respectively. The herd prevalence was 22.4% (95% CI: 17-29%) while the animal prevalence was 5.2% (95% CI: 4-6%) at the cut-off >4 mm. The herd prevalence rose to 65.5% (95% CI: 58-72%) and the animal prevalence rose to 9% (95% CI: 8-10%) when the severe interpretation of >2 mm cut-off was applied. The mean within-herd prevalence in positive farms at the cut-off >4 mm was 22.7% (95% CI: 15-31%). At the herd level, the analysis showed that herd size, farm hygiene, feeding condition and biosecurity were significantly associated with BTB status, while new cattle introductions showed only borderline significance and that age of farm, housing condition, farmers' educational status and animal health care practice were not significant. At the animal level, the results showed that age and animal origin were identified as significant predictors for BTB positivity but sex and body condition score were not related to BTB status. Descriptive analysis revealed that herds having 'BTB history' showed slightly higher likelihood of being BTB positive compared to farms having no previous BTB exposure. In conclusion, this study showed relatively lower average prevalence in the emerging dairy regions as compared to the prevalence observed in and around Addis Ababa City, warranting for implementation of control program at this stage to reduce or possibly stop further transmission of BTB.
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López V, Alberdi P, Mera IGFD, Barasona JA, Vicente J, Garrido JM, Torina A, Caracappa S, Lelli RC, Gortázar C, de la Fuente J. Evidence of co-infection with Mycobacterium bovis and tick-borne pathogens in a naturally infected sheep flock. Ticks Tick Borne Dis 2016; 7:384-9. [DOI: 10.1016/j.ttbdis.2015.12.013] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2015] [Revised: 11/11/2015] [Accepted: 12/14/2015] [Indexed: 12/31/2022]
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Muñoz-Mendoza M, Romero B, del Cerro A, Gortázar C, García-Marín JF, Menéndez S, Mourelo J, de Juan L, Sáez JL, Delahay RJ, Balseiro A. Sheep as a Potential Source of Bovine TB: Epidemiology, Pathology and Evaluation of Diagnostic Techniques. Transbound Emerg Dis 2015; 63:635-646. [DOI: 10.1111/tbed.12325] [Citation(s) in RCA: 38] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2014] [Indexed: 11/28/2022]
Affiliation(s)
- M. Muñoz-Mendoza
- Subdirección de Ganadería; Consellería do Medio Rural; Xunta de Galicia; Edificio Administrativo San Caetano; Santiago de Compostela A Coruña Spain
| | - B. Romero
- Centro de Vigilancia Sanitaria Veterinaria (VISAVET) y Departamento de Sanidad Animal (Facultad de Veterinaria); Universidad Complutense; Madrid Spain
| | - A. del Cerro
- Centro de Biotecnología Animal; SERIDA; Servicio Regional de Investigación y Desarrollo Agroalimentario; Gijón Spain
| | - C. Gortázar
- SaBio IREC (CSIC - UCLM - JCCM); Ciudad Real Spain
| | | | - S. Menéndez
- Departamento de Biología Molecular del Laboratorio de Sanidad y Producción Animal de Galicia; Xunta de Galicia; Lugo Spain
| | - J. Mourelo
- Subdirección de Ganadería; Consellería do Medio Rural; Xunta de Galicia; Edificio Administrativo San Caetano; Santiago de Compostela A Coruña Spain
| | - L. de Juan
- Centro de Vigilancia Sanitaria Veterinaria (VISAVET) y Departamento de Sanidad Animal (Facultad de Veterinaria); Universidad Complutense; Madrid Spain
| | - J. L. Sáez
- Subdirección General de Sanidad e Higiene Animal y Trazabilidad; Dirección General de Sanidad de la Producción Agraria; Ministerio de Agricultura, Alimentación y Medio Ambiente; Madrid Spain
| | - R. J. Delahay
- National Wildlife Management Centre; Animal and Plant Health Agency (APHA); Gloucestershire UK
| | - A. Balseiro
- Centro de Biotecnología Animal; SERIDA; Servicio Regional de Investigación y Desarrollo Agroalimentario; Gijón Spain
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Pesciaroli M, Alvarez J, Boniotti M, Cagiola M, Di Marco V, Marianelli C, Pacciarini M, Pasquali P. Tuberculosis in domestic animal species. Res Vet Sci 2014; 97 Suppl:S78-85. [DOI: 10.1016/j.rvsc.2014.05.015] [Citation(s) in RCA: 103] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2013] [Revised: 04/07/2014] [Accepted: 05/19/2014] [Indexed: 02/03/2023]
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6
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Gates MC, Volkova VV, Woolhouse MEJ. Risk factors for bovine tuberculosis in low incidence regions related to the movements of cattle. BMC Vet Res 2013; 9:225. [PMID: 24206865 PMCID: PMC3826851 DOI: 10.1186/1746-6148-9-225] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2013] [Accepted: 11/06/2013] [Indexed: 11/13/2022] Open
Abstract
Background Bovine tuberculosis (bTB) remains difficult to eradicate from low incidence regions partly due to the imperfect sensitivity and specificity of routine intradermal tuberculin testing. Herds with unconfirmed reactors that are incorrectly classified as bTB-negative may be at risk of spreading disease, while those that are incorrectly classified as bTB-positive may be subject to costly disease eradication measures. This analysis used data from Scotland in the period leading to Officially Tuberculosis Free recognition (1) to investigate the risks associated with the movements of cattle from herds with different bTB risk classifications and (2) to identify herd demographic characteristics that may aid in the interpretation of tuberculin testing results. Results From 2002 to 2009, for every herd with confirmed bTB positive cattle identified through routine herd testing, there was an average of 2.8 herds with at least one unconfirmed positive reactor and 18.9 herds with unconfirmed inconclusive reactors. Approximately 75% of confirmed bTB positive herds were detected through cattle with no known movements outside Scotland. At the animal level, cattle that were purchased from Scottish herds with unconfirmed positive reactors and a recent history importing cattle from endemic bTB regions were significantly more likely to react positively on routine intradermal tuberculin tests, while cattle purchased from Scottish herds with unconfirmed inconclusive reactors were significantly more likely to react inconclusively. Case-case comparisons revealed few demographic differences between herds with confirmed positive, unconfirmed positive, and unconfirmed inconclusive reactors, which highlights the difficulty in determining the true disease status of herds with unconfirmed tuberculin reactors. Overall, the risk of identifying reactors through routine surveillance decreased significantly over time, which may be partly attributable to changes in movement testing regulations and the volume of cattle imported from endemic regions. Conclusions Although the most likely source of bTB infections in Scotland was cattle previously imported from endemic regions, we found indirect evidence of transmission within Scottish cattle farms and cannot rule out the possibility of low level transmission between farms. Further investigation is needed to determine whether targeting herds with unconfirmed reactors and a history of importing cattle from high risk regions would benefit control efforts.
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Affiliation(s)
- M Carolyn Gates
- Epidemiology Group, Centre for Immunity, Infection and Evolution, School of Biological Sciences, University of Edinburgh, Ashworth Laboratories, Kings Buildings, West Mains Road, Edinburgh EH9 3JT, UK.
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Broughan J, Downs S, Crawshaw T, Upton P, Brewer J, Clifton-Hadley R. Mycobacterium bovis infections in domesticated non-bovine mammalian species. Part 1: Review of epidemiology and laboratory submissions in Great Britain 2004–2010. Vet J 2013; 198:339-45. [DOI: 10.1016/j.tvjl.2013.09.006] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2013] [Revised: 09/05/2013] [Accepted: 09/07/2013] [Indexed: 10/26/2022]
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Crawshaw T, Rua‐Domenech R, Brown E. Recognising the gross pathology of tuberculosis in South American camelids, deer, goats, pigs and sheep. IN PRACTICE 2013. [DOI: 10.1136/inp.f5683] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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Burgt GM, Drummond F, Crawshaw T, Morris S. An outbreak of tuberculosis in Lleyn sheep in the UK associated with clinical signs. VETERINARY RECORD CASE REPORTS 2013. [DOI: 10.1136/vetreccr.101048rep] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
Affiliation(s)
- G. M. Burgt
- AHVLA LuddingtonStratford upon AvonWarwickshireUK
| | | | | | - S. Morris
- Alnorthumbria Veterinary PracticeAlnwickUK
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van der Burgt GM, Drummond F, Crawshaw T, Morris S. An outbreak of tuberculosis in Lleyn sheep in the UK associated with clinical signs. Vet Rec 2012; 172:69. [PMID: 23118053 DOI: 10.1136/vr.101048] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
This case report describes an outbreak of Mycobacterium bovis infection a Lleyn sheep flock associated with clinical signs of illthrift. There was no known direct contact with tuberculous cattle although bovine tuberculosis (bTB) is endemic in the area. The spoligotype isolated from the diseased sheep was the local spoligotype. The repeated use of the comparative intradermal tuberculin test, and the subsequent removal of reactor animals, resulted in apparent elimination of bTB from the flock. Lesions caused by M bovis in sheep may contain very few acid-fast bacilli, and gross lesions may resemble those found in cases of Caseous Lymphadenitis. Routine meat inspection may, therefore, not always easily detect this notifiable disease.
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Tuberculosis in Goats and Sheep in Afar Pastoral Region of Ethiopia and Isolation of Mycobacterium tuberculosis from Goat. Vet Med Int 2012; 2012:869146. [PMID: 22852105 PMCID: PMC3407655 DOI: 10.1155/2012/869146] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2012] [Accepted: 05/21/2012] [Indexed: 01/24/2023] Open
Abstract
A cross sectional study was conducted on 2231 small ruminants in four districts of the Afar Pastoral Region of Ethiopia to investigate the epidemiology of tuberculosis in goats and sheep using comparative intradermal tuberculin skin test, postmortem examination, mycobacteriological culture and molecular typing methods. The overall animal prevalence of TB in small ruminants was 0.5% (95% CI: 0.2%-0.7%) at ≥4 mm and 3.8% (95% CI: 3%-4.7%) at cutoff ≥2 mm. The herd prevalence was 20% (95% CI: 12-28%) and 47% (95% CI: 37-56%) at ≥4 mm and ≥2 mm cut-off points, respectively. The overall animal prevalence of Mycobacterium avium complex infection was 2.8% (95% CI: 2.1-3.5%) and 6.8% (95% CI: 5.8-7.9%) at ≥4 mm and ≥2 mm cut-off points, respectively. Mycobacteriological culture and molecular characterization of isolates from tissue lesions of tuberculin reactor goats resulted in isolation of Mycobacterium tuberculosis (SIT149) and non-tuberculosis mycobacteria as causative agents of tuberculosis and tuberculosis-like diseases in goats, respectively. The isolation of Mycobacterium tuberculosis in goat suggests a potential transmission of the causative agent from human and warrants further investigation in the role of small ruminants in epidemiology of human tuberculosis in the region.
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Tschopp R, Bobosha K, Aseffa A, Schelling E, Habtamu M, Iwnetu R, Hailu E, Firdessa R, Hussein J, Young D, Zinsstag J. Bovine tuberculosis at a cattle-small ruminant-human interface in Meskan, Gurage region, Central Ethiopia. BMC Infect Dis 2011; 11:318. [PMID: 22085784 PMCID: PMC3235076 DOI: 10.1186/1471-2334-11-318] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2011] [Accepted: 11/15/2011] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Bovine tuberculosis (BTB) is endemic in Ethiopian cattle. The aim of this study was to assess BTB prevalence at an intensive contact interface in Meskan Woreda (district) in cattle, small ruminants and suspected TB-lymphadenitis (TBLN) human patients. METHODS The comparative intradermal test (CIDT) was carried out for all animals involved in the cross-sectional study and results interpreted using a > 4 mm and a > 2 mm cut-off. One PPD positive goat was slaughtered and lymph nodes subjected to culture and molecular typing. In the same villages, people with lymphadenitis were subjected to clinical examination. Fine needle aspirates (FNA) were taken from suspected TBLN and analyzed by smear microscopy and molecular typing. RESULTS A total of 1214 cattle and 406 small ruminants were tested for BTB. In cattle, overall individual prevalence (> 2 mm cut-off) was 6.8% (CI: 5.4-8.5%) with 100% herd prevalence. Only three small ruminants (2 sheep and 1 goat) were reactors. The overall individual prevalence in small ruminants (> 2 mm cut-off) was 0.4% (CI: 0.03-5.1%) with 25% herd prevalence. Cattle from owners with PPD positive small ruminants were all PPD negative. 83% of the owners kept their sheep and goats inside their house at night and 5% drank regularly goat milk.FNAs were taken from 33 TBLN suspected cases out of a total of 127 screened individuals with lymph node swellings. Based on cytology results, 12 were confirmed TBLN cases. Nine out of 33 cultures were AFB positive. Culture positive samples were subjected to molecular typing and they all yielded M. tuberculosis. M. tuberculosis was also isolated from the goat that was slaughtered. CONCLUSIONS This study highlighted a low BTB prevalence in sheep and goats despite intensive contact with cattle reactors. TBLN in humans was caused entirely by M. tuberculosis, the human pathogen. M. tuberculosis seems to circulate also in livestock but their role at the interface is unknown.
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Affiliation(s)
- Rea Tschopp
- Swiss Tropical and Public Health Institute, PO Box, CH-4002, Basel, Switzerland.
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Marianelli C, Cifani N, Capucchio MT, Fiasconaro M, Russo M, La Mancusa F, Pasquali P, Di Marco V. A case of generalized bovine tuberculosis in a sheep. J Vet Diagn Invest 2010; 22:445-8. [PMID: 20453224 DOI: 10.1177/104063871002200319] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
The present report describes a rare case of generalized bovine-type tuberculosis in a slaughtered 4-year-old ewe discovered during routine surveillance at an abattoir. A postmortem examination revealed lesions in the ewe's thoracic and abdominal cavities, ranging from encapsulated, mineralized foci to extensive, soft, caseous tissue. Lesions in the lungs, liver, and lymph nodes were consistent with mycobacterial infection. A histopathological examination detected granulomatous lesions in all tissue samples. The presence of Mycobacterium tuberculosis complex genome was confirmed through a polymerase chain reaction (PCR) analysis of tissues, using IS6110 primers, followed by a nucleotide sequence analysis of PCR products. Acid-fast bacteria, characterized as Mycobacterium bovis, were isolated from lesions following 38 days of incubation.
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Affiliation(s)
- Cinzia Marianelli
- Department of Food Safety and Veterinary Public Health, Istituto Superiore di Sanità, Viale Regina Elena 299, 00161, Rome, Italy.
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Humblet MF, Boschiroli ML, Saegerman C. Classification of worldwide bovine tuberculosis risk factors in cattle: a stratified approach. Vet Res 2009; 40:50. [PMID: 19497258 PMCID: PMC2710499 DOI: 10.1051/vetres/2009033] [Citation(s) in RCA: 176] [Impact Index Per Article: 11.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2008] [Accepted: 06/04/2009] [Indexed: 11/28/2022] Open
Abstract
The worldwide status of bovine tuberculosis (bTB) as a zoonosis remains of great concern. This article reviews the main risk factors for bTB in cattle based on a three-level classification: animal, herd and region/country level. A distinction is also made, whenever possible, between situations in developed and developing countries as the difference of context might have consequences in terms of risk of bTB. Recommendations are suggested to animal health professionals and scientists directly involved in the control and prevention of bTB in cattle. The determination of Millenium Development Goals for bTB is proposed to improve the control/eradication of the disease worldwide.
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Affiliation(s)
- Marie-France Humblet
- Research Unit in Epidemiology and Risk Analysis applied to Veterinary Sciences, Department of Infectious and Parasitic Diseases, Faculty of Veterinary Medicine, University of Liège, B42, Boulevard de Colonster 20, 4000 Liège-Sart Tilman, Belgium
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