In vitro antibiotic resistance of Vibrio-like organisms isolated from seawater and sand of marine recreation beach in the southern Baltic Sea
Vibrio-like bacteria (VLO) were isolated from the seawater and sand of marine recreation beach located on the southern coast of the Baltic Sea and their antibiotic resistance was studied. According to susceptibility test, planktonic, and benthic VLO were the most resistant to β-lactam (ampicillin and penicillin) and lincosamide (clindamycin) antibiotics, while the most susceptible to tetracycline and aminoglycosides (gentamycin). Moreover the results showed that Vibrio-like bacteria inhabiting sand were more antibiotic-resistant than those isolated from seawater. In general, there was no difference in antibiotic resistance between VLO isolated from the surface and subsurface sand layers. More than 90% of planktonic and benthic Vibrio-like bacteria showed multiple antibiotic resistance.