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Antibiotic resistance of heterotrophic bacteria isolated from the surface microlayer and subsurface water of downtown pond was determined. The levels of resistance of bacteria to various antibiotics differed considerably. It follows from the results that bacteria were most resistant to penicillin and sensitive to gentamycin, neomycin and oxytetracycline. Majority of bacterial strains were characterised by resistance to 6-8 of 18 antibiotics tested. As a rule, there were no significant differences in antibiotic resistance between neustonic and planktonic bacteria. Pigmented bacteria were more antibiotic resistant than non-pigmented ones.
Key words: pond, water, bacteria, antibiotic resistance