A GHORBANI RANJBRY - The veterinary medicines student of Islamic azad university of kazeroon(the member of youngscientific research club of Islamic azad university of kazeroon
Z ghorbani ranjbry - Khormshahar marine science,technology university,iran
N. ghorbani ranjbry - Khormshahar marine science,technology university,iran(the member of young scientific research club of Islamic azad university of kazeroon

Mastitis is one of the most common infectious diseases in dairy cows, therefore detecting the causes is so important. In other hand, Cows with subclinical mastitis show no symptoms and inject different bacteria into the consumption milk though it leads to different disease in human beings. The aim of this study was to check the detected bacteria of milk takrn from the cows that .suffered clinical and subclinical mastitis in the farms of marvdashtTo do this, samples were collected from 200 suffering cows. Mastitis infections were approved by .CMT test and samples were checked by germTotally, 214(83.59%) gram positive and 42(16.41%) gran negative were detected (total: 200cases). Gram positive bacteria include93 staphylococcus aureus (43.45%), 15 Bacillus cereous (7%), 12 Streptococcus uberis(5.6%), 20 Streptococcus felcalis(9.34%), 51 Streptococcus agalactiae (23.83%), 9 Streptococcus dysgalactiae (4.2%) and 14 Streptococcus bovis (6.54%) while the (gram negatives were 35Esherichia coli(83.5%) and 7 klebsiella pneumonia(17.5%

detected bacteria, clinical and subclinical mastitis, marvdasht,diary cow