Comparative Intradermal Tuberculin Test in Dairy Cattle in the North of Ecuador and Risk Factors Associated with Bovine Tuberculosis

Bovine tuberculosis (bTB) is a serious infectious disease of cattle with significant economic impact and public health risk. It is particularly important in Ethiopia where effective control measures are lacking. This cross-sectional study was carried out between April and July 2016 on 1038 cattle selected from 206 dairy farms in Adama city located in central Ethiopia to estimate the prevalence of bTB and identify the potential risk factors using comparative intradermal tuberculin skin test. Accordingly, the individual animal level prevalence was found to be 2.1% (95% CI: 1.35 – 3.22). Of the 206 dairy farms included in the study, 7.3% (95% CI: 4.29 – 11.98) had one or more 15 cattle positive for the tuberculin test. Furthermore, 5.5% of the examined cattle were found reactive for atypical Mycobacterium. Among the risk factors considered, age and lactation status of the animals were significantly associated (p< 0.05) with the prevalence of bTB. It was noted that the apparent prevalence of bTB positive reactivity was greater in young and non-lactating cattle than their counterparts. In conclusion, the present study revealed 2.1% prevalence of bTB in the dairy farms investigated and culling of positive reactors is recommended as a feasible control intervention. Keywords: Adama; Bovine tuberculosis; CIDT; dairy cattle; Ethiopia

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Epidemiological status of bovine tuberculosis in the State of Rio Grande do Sul, Brazil

Semina Ciências Agrárias ◽

10.5433/1679-0359.2016v37n5supl2p3647 ◽

2016 ◽

Vol 37 (5Supl2) ◽

pp. 3647 ◽

Cited By ~ 2

Author(s):

Mariana Ramos Queiroz ◽

Ana Cláudia Mello Groff ◽

Nariléia Dos Santos Silva ◽

José Henrique Hildebrand Grisi-Filho ◽

Marcos Amaku ◽

...

Keyword(s):

Risk Factors ◽

Bovine Tuberculosis ◽

Dairy Herd ◽

Rio Grande ◽

Tuberculin Test ◽

The State ◽

Surveillance Systems ◽

Rio Grande Do Sul ◽

Factors Associated ◽

Minimum Interval

A study was conducted to determine the epidemiological status of bovine tuberculosis in the state of Rio Grande do Sul. The state was divided in seven regions, and in each of them, a pre-established number of farms was randomly sampled. In each farm, cows with age equal to or greater than 24 months were selected at random and submitted to the comparative cervical tuberculin test. The animals whose tests were inconclusive were retested with the same diagnostic procedure within a minimum interval of 60 days. In all, 9,895 animals from 1,067 farms were tested. An epidemiological questionnaire was applied in the farms in order to identify risk factors associated with bovine tuberculosis. The prevalence of infected herds in the state was 2.8% [1.8; 4.0] and that of infected animals was 0.7% [0.4; 1.0]. There was a trend towards a concentration of infected herds in the northern part of the state, with a predominance of dairy and mixed herds. The risk factors associated with the condition of infected herds were being a dairy herd (OR = 2.90 [1.40; 6.13]) and herds with 16 or more cows (OR = 2.61 [1.20; 5.49]). Thus, the best strategy to be adopted by the state is the implementation of surveillance systems to detect and remediate the infected herds, preferably incorporating elements of risk-based surveillance. In addition, the state must carry out a solid action of health education so that the producers test animals for bovine tuberculosis before introducing them in their herds.

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Seroprevalence and risk factors associated with infection by Neospora caninum of dairy cattle in the state of Alagoas, Brazil

Pesquisa Veterinária Brasileira ◽

10.1590/s0100-736x2012001000011 ◽

2012 ◽

Vol 32 (10) ◽

pp. 1009-1013 ◽

Cited By ~ 9

Author(s):

Maria E. Sousa ◽

J.N. Porto Wagnner ◽

Pedro P.F. Albuquerque ◽

Orestes L. Souza Neto ◽

Eduardo B. Faria ◽

...

Keyword(s):

Risk Factors ◽

Dairy Cattle ◽

Indirect Immunofluorescence ◽

Neospora Caninum ◽

Infection Risk ◽

Control Measures ◽

Risk Indicators ◽

Blood Samples ◽

Factors Associated ◽

Serological Investigation

The objective of this study was to investigate the prevalence of anti-Neospora caninum antibodies in cattle from milk producing farms of the microregion of Batalha, state of Alagoas, Brazil, as well as to identify the risk factors associated with the infection. Blood samples were collected from 1,004 cattle of 17 farms for the serological investigation regarding the presence of anti-N. caninum antibodies by the Indirect Immunofluorescence Reaction Technique (IMRT). From the total amount of samples analyzed, 77/1,004 (7.67%) were positive and 927/1,004 (92.33%) were negative. The logistical regression identified that cattle from farms without consortium breeding have an infection risk 6.33 (p<0.001; C.I. 2.89-13.10) times higher than cattle from farms with that type of breeding. Cattle from farms where the aborted fetuses are not adequately buried have an infection risk 3.04 (p<0.001; C.I. 1.64-5.63) times higher than cattle from farms with adequate destination of these fetuses. Infection by N. caninum occurs in cattle of the investigated region. The factors identified in our study can be used as risk indicators, so that control measures could be implemented to avoid infection by N. caninum in the herds of this region.

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Risk Factors Associated with Bovine Tuberculosis and Molecular Characterization ofMycobacterium bovisStrains in Urban Settings in Niger

Transboundary and Emerging Diseases ◽

10.1111/j.1865-1682.2011.01302.x ◽

2012 ◽

Vol 59 (6) ◽

pp. 490-502 ◽

Cited By ~ 16

Author(s):

A. R. Boukary ◽

E. Thys ◽

L. Rigouts ◽

F. Matthys ◽

D. Berkvens ◽

...

Keyword(s):

Risk Factors ◽

Molecular Characterization ◽

Bovine Tuberculosis ◽

Urban Settings ◽

Factors Associated

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Bovine tuberculosis and its risk factors among dairy cattle herds in and around Bahir Dar City, Northwest Ethiopia

Ethiopian Veterinary Journal ◽

10.4314/evj.v19i2.3 ◽

2015 ◽

Vol 19 (2) ◽

pp. 27 ◽

Cited By ~ 10

Author(s):

Anwar Nuru ◽

Gezahegne Mamo ◽

Leakemariam Teshome ◽

Aboma Zewdie ◽

Girmay Medhin ◽

...

Keyword(s):

Risk Factors ◽

Dairy Cattle ◽

Bovine Tuberculosis ◽

Northwest Ethiopia ◽

Bahir Dar ◽

Cattle Herds

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The prevalence of hock lesions in UK dairy cattle and the significance of risk factors associated with the development of the condition

Proceedings of the British Society of Animal Science ◽

10.1017/s1752756200029343 ◽

2009 ◽

Vol 2009 ◽

pp. 95-95

Author(s):

S Potterton ◽

M Green ◽

J Harris ◽

K Millar ◽

H Whay ◽

...

Keyword(s):

Risk Factors ◽

Dairy Cattle ◽

Clinical Mastitis ◽

Related Factors ◽

Death Rates ◽

Factors Associated ◽

Cell Counts ◽

East Midlands ◽

Potential Risk Factors ◽

The Uk

The term hock lesion describes incidences of hair loss, thickened skin, wounds, scabs, and swellings occurring over the tarsal joint. Hock lesions in dairy cattle are a widespread problem around the world. In the UK, a recent study found approximately 99% of examined cows had at least some callused area over a hock (Haskell et al., 2006). The presence of hock lesions is correlated with injuries of the teat, carpal joints and skin, as well as increases in mobility score, high somatic cell counts, a greater incidence of clinical mastitis, and higher culling and annual death rates. Differences in the prevalence and severity of hock lesions according to the lying surface and cubicle design have been identified. Cow-related factors and management variables have also been postulated as possible risk factors. Recognition of the condition and practical solutions aimed at resolving it have however, been limited. The aim of this study was to determine the prevalence of hock lesions in lactating cattle on dairy farms in the East Midlands of the UK, and the significance of potential risk factors in the development of the lesions.

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