Cu, Cd, As and Hg resistance levels in Escherichia coli isolated from Mediterranean mussel and sea snail in the Southeastern Black Sea

Authors : Ertuğrul TERZİ, Fatih CİVELEK

Pages : 36-41

Doi:10.33714/masteb.776902

View : 17 | Download : 8

Publication Date : 2021-03-31

Article Type : Research Paper

Abstract :Marine environment is exposed to various pollutants such as heavy metals, pesticides, and antibiotics. Bacterial resistance to these pollutants is a global problem all over the world. In this study, Mediterranean mussel insert ignore into journalissuearticles values( Mytilus galloprovincialis); and sea snail insert ignore into journalissuearticles values(Rapana venosa); were collected from 12 sampling points from Artvin, Rize, Trabzon, and Giresun Coasts of Black Sea, Turkey. A total of 54 Escherichia coli isolated from Mediterranean mussel and sea snail were tested for their ability to tolerate Cu, Cd, As, and Hg. For this purpose, minimum inhibitory concentration insert ignore into journalissuearticles values(MIC); tests for all isolates to the Cu, Cd, As, and Hg were done to determine tolerance or resistance using the broth dilution technique. MIC concentration for Cu, Cd, As, and Hg ranged between 100-400 μg/ml, 100-200 μg/ml, 25-400 μg/ml, and 3.125-25 μg/ml, respectively. All of the strains were determined as resistant to Cu, but sensitive to As. Resistance to Hg was determined as 7.4 %. The most common resistance gene in the bacteria was nccA and followed by chrB and merA . Tolerance or resistance of the bacteria to toxic pollutants including heavy metalinsert ignore into journalissuearticles values(oid);s is of significant ecological importance. These bacteria could be used for monitoring environmental heavy metalinsert ignore into journalissuearticles values(oid); pollution.
Keywords : Resistance gene, Rapana venosa, Mytilus galloprovincialis, Black Sea