[Survey on biochemical characterization and transferable R-factor patterns for biotyping S. abortusovis strains isolated from chaharmahal and bakhtiari province of Iran]

ABSTRACT

To study blechemichal properties and comparing current antibiotic resistance of S. abortusovis isolated from sheep in Ch-Bakhtiary province and study the prone to R - factor transferability. Comparative study. Thirty four strains isolated from Chaharmahal-Bakhtiary in 1999-2000. Biochemical tests were performed with standard diagnostic tests, antibiotic susceptibility and it's transferability were examined. All strains were resistant to Ampicillin [Am] and Amoxicillin [Amx]. Although the Streptomycin [S] after the Am and Amx was the most common resistance. Resistance to Amicacin [AN] and Tetracyclin [Te] were very low [about 2%]. All strains were susceptible to Chloramphenicol [C], Nalidixic Acid [Na], Kanamicin [K] and Enrofloxacin [En]. Just in one case the profile of Am - Amx - Cotrimaxazole [SXT]- AN- Te wasdeveloped. Among the total isolates, 3 cases were able to transfer some part of their resistance factors. In all three cases only resistance to Ampicillin were transmitted. Antibiotic resistance in S. abortusovis strains isolated from Iran is not that high and rarely were transmited to other bacteria. This phenomenon may be related to the defficalties of drug administration in sheep and got flocks