Evaluation of Erythromycin–resistant and Chloramphenicol-sensitivity on Agrobacterium vitis in Iran

The purpose of this study was to determine the prevalence of Erythromycin and Chloramphenicol resistant/sensitivity of Agrobacterium vitis that isolated from environmental samples in Iran vineyards. From May to June ۲۰۱۴, ۲۰ samples isolated from Vineyards of five grape cultures from west of Iran. After identification of Agrobacterium vitis by biochemical, microbiological and molecular methods, antibiotic susceptibility testing was performed by Kirby-Bauer disk diffusion test for these antibiotics. The lowest and highest resistance was seen for Chloramphenicol (n=۱) and Erythromycin(n=۱۰). The results showed that the frequency of Erythromycin resistance is very high in Agrobacterium vitis strains isolated from vineyards that had crown Gall in west of Iran. Thus, urgent interventions are needed to keep the emergence and transmission of these isolates to a minimum. The lowest resistance on Chloramphenicol in Agrobacterium vitis strains showed that we can use it for urgent occasions.