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. 2016 May 25:12:80.
doi: 10.1186/s12917-016-0705-9.

Prevalence and risk factors of bovine tuberculosis in dairy cattle in Eritrea

Michael K Ghebremariam  1   2 , V P M G Rutten  3   4 , J C M Vernooij  5 , K Uqbazghi  6 , T Tesfaalem  7 , T Butsuamlak  8 , A M Idris  9 , M Nielen  5 , A L Michel  4
Affiliations

Prevalence and risk factors of bovine tuberculosis in dairy cattle in Eritrea

Michael K Ghebremariam et al. BMC Vet Res. .

Abstract

Background: The prevalence of bovine tuberculosis (BTB) in dairy cattle in the three major milk producing regions of Eritrea was assessed by subjecting 15,354 dairy cattle, 50 % of Eritrea's dairy cattle population, to the single intradermal comparative tuberculin test (SICTT). Skin test results were interpreted according to guidelines of the World Organization for Animal Health (OIE) with >4 mm as cutoff in skin thickness increase. In addition, we studied the relation between 'physiological' variables related to pregnancy and lactation, and the variable 'region' on the probability to be skin test positive.

Results: The BTB prevalences at animal and herd levels were: 21.5% and 40.9% in Maekel, 7.3% and 10% in Debub, and 0.2% and 1.6% in the Anseba region, respectively. Overall, in the regions included, prevalence was 11.3% (confidence interval (CI) 95% CI, 11.29 - 11.31%) and 17.3% (95% CI, 17.27-17.33%), at animal and herd level, respectively. Considering positive herds only, the animal BTB prevalence was 36.8%, 30.1%, and 1.8%, in Maekel, Debub and Anseba, respectively, and the overall animal prevalence within these herds was 32%. In adult dairy cattle the probability of positive reactivity in the SICTT test was highest in pregnant animals as compared to the other categories.

Conclusion: This study reports persistent prevalence of BTB as defined by positive SICTT in the dairy sector of Eritrea, especially in the regions of Maekel and Debub that are located in the central highlands of the country. To our understanding this is the first report that has encompassed all the major dairy farms in Eritrea and it will be instrumental in advocating future BTB control programs in the dairy sector.

Keywords: Bovine tuberculosis (BTB); Comparative tuberculin test; Dairy; Eritrea; Prevalence.

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Figures

Fig. 1
Fig. 1
Map of Eritrea and the study areas. The map shows the six administrative regions of Eritrea and the three major milk producing regions of the country where the study was conducted: Maekel (1), Debub (2) and Anseba (3). Adapted from https://commons.wikimedia.org/wiki/File:Eritrea_regions_blank.png (website re- visited: 06/05/2016)
See this image and copyright information in PMC

References

    1. Regassa A, Tassew A, Amenu K, Megersa B, Abuna F, Mekbib B, Macrotty T, Ameni G. Across-sectional study on bovine tuberculosis in Hawassa town and its surroundings, South Ethiopia. Trop Anim Health Prod. 2010;42:915–20. doi: 10.1007/s11250-009-9507-4. - DOI - PubMed
    1. Radostits OM, Gay CC, Hinchcliff KW, Constable PD. Veterinary medicine- a text book of the diseases of cattle, sheep, pigs, goats and horses. 10. London: Sounders; 2007. Diseases caused by mycobacterium species; pp. 1007–44.
    1. Munyeme M, Muma JB, Samui KL, Skjerve E, Nambota AM, Phiri IGK, Rigouts L, Tryland M. Prevalence of bovine tuberculosis and animal level risk factors for indigenous cattle under different grazing strategies in the livestock/wildlife interface areas of Zambia. Trop Anim Health Prod. 2009;41:345–52. doi: 10.1007/s11250-008-9195-5. - DOI - PubMed
    1. Shirima GM, Kazwala RR, Kambarage DM. Prevalence of bovine tuberculosis in cattle in different farming systems in the eastern zone of Tanzania. Prev Vet Med. 2003;57:167–72. doi: 10.1016/S0167-5877(02)00214-3. - DOI - PubMed
    1. Katale BZ, Mbugi EV, Karimuribo ED, Keyyu JD2, Kendall S, Kibiki GS5, Godfrey-332 Faussett P, Michel AL, Kazwala RR, van Helden P and Matee MI. Prevalence and risk factors for infection of bovine tuberculosis in indigenous cattle in the Serengeti ecosystem, Tanzania. BMC Vet Res. 2013;9:267. - PMC - PubMed

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