FIG 2.

Prevalences of Aeromonas species among tetracycline- and ciprofloxacin-resistant populations. Isolates (n = 119 total) were randomly picked from filter plates containing ADA-VI (white bars; n = 51), ADA-VI supplemented with 4 μg/ml tetracycline (gray bars; n = 50), and ADA-VI supplemented with 0.16 μg/ml ciprofloxacin (black bars; n = 18). Species identity was determined using RFLP analysis of the 16S rRNA gene and was confirmed by gyrB sequencing analysis. A. allosacch., A. allosaccharophila.