Original scientific paper

Influence of enzootic bovine leukosis virus upon the incidence of subclinical mastitis in cows at a different stage of infection.

Nikolay Sandev ; Trakia University, Faculty of Veterinary Medicine, Stara Zagora, Bulgaria
Mariana Koleva ; Trakia University, Faculty of Veterinary Medicine, Stara Zagora, Bulgaria
Rumen Binev ; Trakia University, Faculty of Veterinary Medicine, Stara Zagora, Bulgaria
Darinka Ilieva ; National Diagnostic and Research Veterinary Medical Institute, Sofia, Bulgaria

Abstract

Studies were performed on 26 cows, divided into 3 groups on the basis of serological (by immunodiffusion test) and haematological analyses for bovine leukosis: Group I - seropositive without changes in haemogram; group II - seropositive with changes in haemogram and group III (control) - BLV negative. A statistically significant difference was observed in the incidence of subclinical mastitis in cows from group II (P<0.05) compared to healthy animals. The most commonly isolated microorganism was S. agalactiae (46.80%), followed by Staphylococcus spp. (36.06%). The results of our studies, as well as data from other investigators evidenced that the incidence of subclinical mastitis was higher in cows with changes in the white blood cell picture due to the immunosuppressive effect of the enzootic bovine leukosis virus.

Keywords

bovine enzootic leukosis; cows; subclinical mastitis

Hrčak ID:

68920

URI

https://hrcak.srce.hr/68920

Publication date:

21.12.2004.

Article data in other languages: croatian

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