Issue 4

Journal for Veterinary Medicine, Biotechnology and Biosafety

Volume 1, Issue 4, December 2015, Pages 35–37

ISSN 2411-3174 (print version) ISSN 2411-0388 (online version)

Coagulase-negative staphylococci and their significance for subclinical mastitis

Boboš S., Radinović M., Pajić M.

Department of Veterinary Medicine, Faculty of Agriculture, University of Novi Sad, Novi Sad, Serbia, e-mail:

Mašić Z.

Scientific Veterinary Institure, Novi Sad, Serbia

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Citation for print version: Boboš, S., Radinović, M., Pajić, M. and Mašić, Z. (2015) ‘Coagulase-negative staphylococci and their significance for subclinical mastitis’, Journal for Veterinary Medicine, Biotechnology and Biosafety, 1(4), pp. 35–37.

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Citation for online version: Boboš, S., Radinović, M., Pajić, M. and Mašić, Z. (2015) ‘Coagulase-negative staphylococci and their significance for subclinical mastitis’, Journal for Veterinary Medicine, Biotechnology and Biosafety. [Online] 1(4), pp. 35–37. Available at:

Summary. Coagulase-negative staphylococci are a frequent cause of bovine intramammary infections in modern dairy herds. They have become the most common bacteria isolated from milk samples in many countries. Because of high prevalence of these intramammary infections it has a great impact on bulk tank somatic cell count. The objective of the study was to analyze the impact of coagulase-negative staphylococci intramammary infection on cows somatic cell count and on the potential of these infections to have a major impact on the bulk milk somatic cell count. The study was conducted on two dairy farms with high milk production and increased number of somatic cells in bulk tank milk. Bacteriological examination of milk samples from cows positive on CMT test pointed high prevalence of coagulase-negative staphylococci in cows with secretion disorder in both herds, up to 81.8%. Somatic cell count in these milk samples was also very high and counted over 1 million per milliliter. The highest number of somatic cells was in milk samples from cows with Staphylococcus aureus, but prevalence of these infections was very low.

Keywords: coagulase-negative staphylococci, intramammary infection, somatic cells


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