TY - JOUR ID - 71 TI - The prevalence of clinical and subclinical mastitis in dairy cows in the central region of Fars province, south of Iran JO - Iranian Journal of Veterinary Research JA - IJVR LA - en SN - 1728-1997 AU - Hashemi, M. AU - Kafi, M. AU - Safdarian, M. AD - Department of Animal Sciences, Research Center for Agriculture and Natural Resource of Fars Province, Shiraz, Iran AD - Department of Clinical Sciences, School of Veterinary Medicine, Shiraz University, Shiraz, Iran Y1 - 2011 PY - 2011 VL - 12 IS - 3 SP - 236 EP - 241 KW - Mastitis KW - Prevalence KW - Dairy cows KW - Fars KW - Iran DO - 10.22099/ijvr.2011.71 N2 - licensed dairy farms in the central region of Fars province were randomly selected in order to participate in aseasonal prevalence study. A cross-sectional study was designed to determine prevalence at cow and quarterlevel based on clinical signs for clinical mastitis and indirect tests for subclinical mastitis. 6180 quarters from1545 dairy cows were tested by clinical examination and California mastitis test (CMT). Milk samples fromboth clinical and subclinical quarters were collected for bacteriological culture. 4714 (76.28%) quarters werehealthy, 1335 (21.6%) quarters were positive by results of CMT (as indicated to subclinical mastitis), 44(0.71%) quarters showed clinical mastitis signs and 87 (1.41%) quarters were blind. The clinical and subclinical mastitis prevalence at cow level was 2.2 and 42.5%, respectively. There was no significantdifference in the prevalence of mastitis between different quarters, seasons and cities. The most prevalentisolated bacteria were coagulase positive staphylococci followed by Streptococci, Escherichia coli andcoagulase negative staphylococci. Insufficient control measures such as pre and post milking hygiene and dry cow therapy in dairy farms and limited knowledge of farmers on the importance, identification and control of mastitis, especially subclinical forms, can be the main causes for the high prevalence of mastitis in Farsprovince. UR - https://ijvr.shirazu.ac.ir/article_71.html L1 - https://ijvr.shirazu.ac.ir/article_71_6c3b10c38b9f745f57da09ceb9335757.pdf ER -