İzmit Körfezinden İzole Edilen Escherichia coli'lerde R Plazmidlerine Bağlı "Bulaşıcı Tipte Antibiyotik Direnç Özelliğinin'' Belirlenmesi

Bu çalışmada İzmit Körfezi'ndeki 9 istasyondan alınan 23 deniz suyu örneğinden izole edilen ve körfezde kirliliğe neden olan koliformlardan 8 Escherichia coli suşu antibiyotiklere karşı çoklu dirençlilik ve bulaşıcı tipte plazmid "R faktörü'' taşıma özellikleri yönünden incelenmiştir. E. coli suşlarının örneklerden (deniz suyundan) izolasyonu ve identifikasyonu klasik metodlarla yapılmıştır. Antibiyotik duyarlılık testleri Kirby-Bauer Disk Difüzyon Metoduna göre gerçekleştirilmiştir. İzole edilen E. coli suşlarının antibiyotiklere dirençlilikleri Tetracylin için %50, Sulbactam/Ampicillin için %62.5, Penicillin için %62.5, Gentamicin için %50, Amikacin için %12.5, Chloramphenicol için %37.5, Cefoperozone için %25, Kanamycine için %37.5, Trimethoprim + Sulphametoxozale için %62.5 olarak tesbit edilmiştir. Bu çalışma, İzmit Körfezi'ndeki kirlenmenin ve kirlilik indikatörü olan koliform varlığının önemli boyutlarda olduğunu göstermektedir. Ayrıca su kaynaklı olan E. coli suşlarının en az 2 antibiyotiğe birden çoklu direnç taşıdıkları ve bu dirençlilik durumlarını R plazmidleri ile aktarabilme yeteneğinde oldukları ispatlanmıştır. Koliform bakterilerde çoklu dirençliliği sağlayan R plazmidlerinin varlığı da saptanmıştır. Bu çalışmanın sonuçları, önemli bir sağlık tehdidi olan İzmit Körfezi'ndeki E. coli suşlarının direnç modelinin ortaya konulmasında önemlidir.

Investigation of "Contagious Type Antibiotic Resistance Properties" Related with R Plasmids in Escherichia coli Strains Isolated from İzmit Gulfs (Turkey)

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 İzmit, 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 Diff ussion 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 İzmit 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 eff ectively help to understandthe resistance models of the E. coli found at the Gulf of İzmit/Turkey.

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