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. 2019 Jul;51(6):1507-1513.
doi: 10.1007/s11250-019-01838-w. Epub 2019 Feb 11.

Risk factors for bovine mastitis with the isolation and identification of Streptococcus agalactiae from farms in and around Haramaya district, eastern Ethiopia

Biniam Tsegaye Lakew  1   2 , Taresa Fayera  3 , Yimer Muktar Ali  3
Affiliations

Risk factors for bovine mastitis with the isolation and identification of Streptococcus agalactiae from farms in and around Haramaya district, eastern Ethiopia

Biniam Tsegaye Lakew et al. Trop Anim Health Prod. 2019 Jul.

Abstract

A cross-sectional study was carried out to determine the prevalence and risk factors of bovine mastitis caused by Streptococcus agalactiae from farms in and around Haramaya district, eastern Ethiopia. A total of 384 lactating cows were selected from small-, medium-, and large-scale production systems. California mastitis test (CMT) was used for screening subclinical mastitis. Out of the total animals examined, 63.02% (n = 242) had mastitis, where 6.77% (n = 26) and 56.25% (n = 216) were clinical and subclinical mastitis respectively. The quarter-level prevalence was 29.04% (n = 446), from which the clinical form was 6.38% (n = 98) and the subclinical was 22.66% (n = 348), and the rest quarters were blind 3.32% (n = 51). Milk samples from clinical as well as CMT positive quarters were cultured for isolation of S. agalactiae, where 10.3% (n = 46) resulted in growth of the bacterium. The prevalence of mastitis was found to be statistically significant among the age groups (p = 0.002), breed (p = 0.000), and parity (p = 0.000). Similar findings were found to the extrinsic risk factors considered; as production type (p = 0.010), teat injury (p = 0.02), and type of floor (p = 0.000). The study confirmed the importance of S. agalactiae as the cause of contagious mastitis and also identified the associated risk factors in the study farms and hence warrants serious attention.

Keywords: CMT; Haramaya district; Risk factors; Streptococcus agalactiae.

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Conflict of interest statement

The authors declare that there is no conflict of interest.

Figures

Fig. 1
Fig. 1
The “arrow head” formation at the junction of Staphylococcus aureus and Streptococcus agalactiae
See this image and copyright information in PMC

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