Study of bovine mastitis in different climatic conditions in Jharkhand, India

Among 190 milk samples confirmed positive for bovine mastitis by California mastitis test, Somatic cell count and White side test. Among 190 samples, 138 (72.63 %) samples. Staphylococcus aureus (27.37%) was found to be the most prevalent organism followed by coagulase negative Staphylococcus spp. (12.63%), E. coli. (08.95%), Pseudomonas spp. (07.89%), Streptococcus spp. (05.79%), mixed bacterial infection (04.74%), yeast (03.15%), Klebsiella spp. (01.57%) and Bacillus spp. (00.52%). Further, the incidence of bovine mastitis was recorded under different climatic conditions, which was found to be highest in winter followed by summer and least in rainy season. Additionally, it was observed that Gram positive organisms were more common cause of bovine mastitis than Gram negative and Staphylococcus aureus was most common isolate in all the seasons. Incidence of bovine mastitis has been also recorded under different climatic conditions. However, Streptococcus spp. showed a significant rise in incidence during summer. Our results revealed that there was a definite impact of seasonal variation on incidence of bovine mastitis and the microbe associated with it.