Evaluation of the Prevalence of Vibrio Species Isolated from Coastal Waters of Bandarabbas and Determination of Their Microbial Resistance during 2010-2011, Iran

Vibrio species have been known as the cause of gastrointestinal and extraintestinal disorders, which usually appear epidemically in some seasons of the year. Since the sea has been known as one of the important ecosystems of Vibrio species, this study was carried out with the aim of determining the prevalence of Vibrio species and their microbial resistance in different coastal regions of the south of country in different seasons of year. In this descriptive cross-sectional study, 600 water samples taken from the coastal waters of Bandar Abbas were evaluated in terms of presence of Vibrio strains in two seasons of spring and winter. For primary detection, alkaline peptone water and TCBS were used, and the final identification was carried out using biochemical tests (oxidase, motility, Indole ring, KIA, and other biochemical tests such as 0% NaCl, 6% NaCl, VP, and ONPG). V. harveyi (2.3%), V. cholerae (1.7%), V. parahaemolyticus (1.3%), V. furnissii (1.2%), V. metschnikovii (1%), P. shigelloides (1%), A. hydrophila (0.5%), V. vulnificus and V. mimicus (0.3%), and V. fluvialis (0.2%) had the highest prevalence. Also, in terms of the studied seasons, 71.2% of the contamination was related to winter season and 28.8% to spring season, which showed that the cases of contamination in winter was higher than in spring. Based on the study of researchers, the isolation of these species increases after rain. In the present study, this parameter had a positive effect on the isolation of Vibrio species.