Izabella Zmysłowska
University of Warmia and Mazury, Prawocheńskiego 1, 10-957 Olsztyn,
Poland
Key words: Baltic Sea, Vistula Lagoon, bacteria, water, herring, intestinal tract
Abstract.
Quantitative investigations revealed that bacteria
incubated on a common agar medium at temperatures of 20°C (TVC 20°C) and
37°C (TVC 37°C) occurred in the ranges of 3,800 to 18,300 and from 900
to 6,700 cfu in 1 ml of Vistula Lagoon water, respectively. The same bacteria
groups identified in herring intestinal tract contents varied from 4,210
to 37,700 (TVC 20°C) and 950 to 28,840 (TVC 37°C) cfu/g.
Qualitative investigations revealed a similar composition of bacteria
in water and intestinal tract contents. The following bacteria were confirmed
in both environments: Vibrio, Pseudomonas, Aeromonas, Enterobacter,
Escherichia, Streptococcus and Staphylococcus.
Bacillus and Micrococcus occurred only in the water.