Dr. D.S. NauriyalAMIT KUMAR VERMA2017-07-142017-07-142008http://krishikosh.egranth.ac.in/handle/1/5810025195Intramammary infection (IMI) or mastitis is considered a potential threat to the dairy farmers, dairy industry as well as milk consumers. Of the two farms of the disease, subclinical IMI accounts for a majority of losses incurred on account of udder infections. The present study was conducted during February, 2007 to July, 2007 on a total of 112 lactating animals comprising 97 cows {28 Triple cross {Kankrej x Jersey x Holstein Friesian), 33 Kankrej and 36 Holstein Friesian)} and 15 buffaloes. Besides, eleven cows {Kankrej x HF, (6 in no.) and Kankrej x Jersey, (5 in no.)} with clinical mastitis belonging to private dairy farms, were used for conducting a therapeutic trial.enVeterinary MicrobiologyAnalysisThesis