Acinetobacter spp.: distinct morphology on eosin methylene blue agar as an aid to identification in drinking water.

Acinetobacter calcoaceticus, frequently found in drinking waters and implicated in nosocomial infections, was presumptively identified by its tiny, blue colonial appearance on Levine eosin methylene blue agar. All of the 33 isolates from drinking water showing this distinctive colonial appearance were identified as A. calcoaceticus.