The authors present the results of bile cultivation from obturated bile ducts. The bile was obtained during ERCP. The results agree in principle with data reported in the literature. The authors emphasize the regional variability of bacterial strains and their sensitivity. It is thus an ever urgent problem which deserves attention, in particular preventive administration of antibiotics. At the authors department as preventive antibiotic cefoperazone proved useful.

        Key words: obturated bile ducts - microbiological finding - sensitivity - prophylaxis - ERCP