PREVALENCE OF MASTITIS AND IDENTIFICATION OF CAUSITIVE PATHOGENS IN LOCAL AND CROSSBRED COWS IN DERA ISMAIL KHAN

Abstract

Clinical mastitis was diagnosed on the basis of clinical examination and subclinical mastitis by Surf Field Mastitis Test of milk samples from lactating cows (100 local and 100 crossbred) in the present study. All the milk samples were processed for isolation and identification of pathogens. In local cows, animal-wise prevalence of subclinical mastitis was 29% and clinical mastitis 7%. In crossbred cows, animal-wise subclinical mastitis was 41% and clinical mastitis was12%. Quarter-wise
subclinical mastitis prevalence was 24.75% and 32% in local and crossbred cows respectively. Quarter-wise prevalence was higher in hindquarters than forequarters. Among the pathogens isolated from milk samples, Staphylococcus aureus showed the highest (43%) frequency, followed by Streptococcus agalactiae (22%), E. coli (19%) and Bacillus spp. (16%) in local cows. In crossbred cows, Staphylococcus aureus, Streptococcus agalactiae, E. coli and Bacillus spp. were isolated from 47, 28, 15 and 9% milk samples, respectively.