Seasonal Occurrence of Several Groups of Heterotrophic Bacteria in Two Reservoirs

Abstract 75% of the isolated strains were Gram negative, asporogenous bacteria. Almost a half of them fermented glucose, which was probably caused by a selectivity of the agar medium for the particular types. The groups tentatively classified as Enterobacteriaceae and Aeromonas, prevailed during summer, whereas pseudomonads and Acinetobacter were more common in winter.