Figure 1.

Relative percentages of ESBL and suspected KPC in total detected bacteria and E. coli sampled from environmental waters. Relative percentages of antimicrobial-resistant bacteria from (a) total detected bacterial colonies and (b) E. coli collected from membrane filtration across 17 respective environmental water sources. Error bars, representing standard deviation, were generated from each numerator value (individual ESBL/KPC bacterial abundance counts per source) divided by the average of total detected plated bacteria per source. ESBL = extended-spectrum beta-lactamase (grey bars), KPC = Klebsiella pneumoniae carbapenemase (white bars), and WWTP = wastewater treatment plant.