[Study of Aeromonas (motile) in the sewage from the city of Buenos Aires and water from the Río de la Plata].

The incidence of motile aeromonas in the sewage of Buenos Aires city and in the water of the Río de la Plata was investigated. Eight morphological and biochemical properties were established for the classification of bacteria in the genus Aeromonas. These properties adapted from Popoff and Veron (19) permitted us to classify the isolated strains into two species: A. hydrophila and A. sobria. In the water of the Río de la Plata, of 27 isolated strains 24 were classified as A. hydrophila and 1 as A. sobria. The co-existence of two species of motile aeromonas is discussed. The usefulness of several isolation media and the temperature of incubation are emphasized.