[Qualitative and quantitative examination of bacteria found in aquatic habitats. 1. Communication: selective recording of bacteria during isolation on different solid media (author's transl)].

The quantity of bacteria taken from 8 watersamples and 46 slimesamples in the sphere of drinking water were examined using 15 different solid media. These media showed variations in total colony count and more or less selectivity against several bacterial groups. For the recording of as much bacteria as possible and as much different species as possible low nutrient containing media are necessary.