Investigation of contagious type antibiotic resistance properties related with R plasmids in Escherichia coli strains isolated from i̇zmit gulfs (Turkey) [İzmit körfezinden i̇zole edilen Escherichia coli'lerde R plazmidlerine baǧli{dotless} bulaşici tipte antibiyotik direnç özelliǧinin belirlenmesi]

In this study,8 escherichia coli strains one of the pollutions of the gulf were from the twenty-three seawater samples taken from 9 chosen sites in the gulf of izmit,and 8 e. coli coliforms which is one of the pollutions of the gulf,have been studied with respect to their resistance to antibiotics and their carrier properties of contagious types plasmids with r factor. e. coli samples were isolated and identified by use of classic methods. sensitivity tests for antibiotics were conducted according to the kirby-bauer disc diffussion method. the results of e. coli isolates to various antibiotics were as follows; 50% resistance to tetracyline,62.5% for sulbactam/ amphicillin,62.5% for penicillin,50% for gentamicin,%12.5 for amikacin,37.5% for chloramphenicol,25% for cefoperozone,37.5% for kanamycin,and 62.5% for trimethoprim + sulphamethoxozale. this study demonstrates the importance of water pollution in the gulf of izmit by these pollution indicators,the presence of coliforms. furthermore,e. coli a water related bacterium,has been proven to be highly resistant to at least 2 antibiotics and to be able to transfer this resistance to r plasmids. in coliform bacteria,presence of high resistance provider r plasmids have been found. this study may effectively help to understandthe resistance models of the e. coli found at the gulf of izmit/turkey.