Pakistan Journal of Biological Sciences1028-88801812-5735Asian Network for Scientific Information10.3923/pjbs.2007.3014.3016EbrahimiAzizollah KheirabadiK.H. PiraliNikookhahFarzaneh 1220071017The purpose of this study was to describe antimicrobial susceptibility of environmental mastitis pathogens isolated from dairy herds of Chahar Mahal province in west central Iran. Out of the 620 milk samples collected from the four districts, 180 were CMT (California mastitis test) positive that cultured and yield, 7 (3.88%) coagulase negative Staphylococci (CNS), 15 (8.33%) Streptococci other than agalactiae and 17 (9.44%) E. coli. CNS resistance to penicillin was 14.28% but for streptomycin, Oxytetracycline and Colistin, were 28.57%. Non agalactiae Streptococci resistance to Oxytetracycline and Kanamycin were 20 and 13.33%, respectively. E. coli resistance to penicillin, oxytetracycline, streptomycin, erythromycin and Colistin were 88.23, 82.35, 76.47, 76.47 and 52.94%, respectively.]]>Dopfer, D., H.W. Barkema, T.J.G.M. Lam, Y.H. Schukken and W. Caastra,1999Escherichia coli in dairy cows.]]>828085Karimuribo, E.D., L.J. Kusiluka, R.H. Mdegela, A.M. Kapaga, C. Sindato and D.M. Kambarage,20056213221Hirvela-Koski, V., T. Honkanen-Buzalski, J. Juntilla, L. Kulkas and O. Myllykangas et al.,199839119126Jarret, J.A.,19813447454Makovec, J.A. and P.L. Ruegg,20038634663472NCCLS,20022nd Edn.,Quinn, P.J., M.E. Carter, B.K. Markey and G.R. Carter,1994pp: 22-91pp: 22-91Rajala-Schultz, P.J., K.L. Smith, J.S. Hogan and B.C. Love,20041023342Rossitto, P.V., L. Ruiz, Y. Kikuchi, K. Glenn, K. Luiz, J.L. Watts and J.S. Cullor,200285132138Sobiraj, A., A. Kron, U. Schollmeyer and K. Failing,1997in vitro resistance of udder pathogenic bacteria in the milk of cows with subclinical mastitis.]]>25108115Trinidad, P., S.C. Nickerson and R.W. Adkinson,1990Staphylococcal mastitis in unbred dairy heifers.]]>73639647Watts, J.L., S.A. Salmon, R.J. Yancey Jr., S.C. Nickerson and L.J. Weaver et al.,19957816371648