Antibiotic resistance of Escherichia coli in Dalian Xinghai Bathing Beach

We study the antibiotic resistance of Escherichia coli in Dalian Xinghai Bathing Beach.36 strains were screened from seawater using membrane filter and used for further identification.Biochemical method and PCR method confirmed 8 of 36 strains were Escherichia coli.Antibiotic resistance of E.coli to 12 common-used antibiotics were measured using K-B paper test.All tested E.coli showed antibiotic resistance and resistant rates is over 50% to 10 of 12 antibiotics.The resistant rates of E.coli to rifampicin,chloramphenicol and Compound sulfamethoxazole is 100%,25%and 37.5%,respectively.All isolated E.coli were identified as multiple-resistant strains,87.5% of E.coli occurred resistant to more than 3 antibiotics.These results suggest the multiple-resistance of E.coli is severe in Dalian Xinghai Bathing Beach.