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. 2014 Sep;86(9):835-43.

Antibiotic resistance in Aeromonas upstream and downstream of a water resource recovery facility

Cindy R Cisar, Samantha K Henderson, Maegan L Askew, Hollie G Risenhoover, Chrystle R McAndrews, S Dawn Kennedy, C Sue Paine

Antibiotic resistance in Aeromonas upstream and downstream of a water resource recovery facility

Cindy R Cisar et al. Water Environ Res. 2014 Sep.

Abstract

Aeromonas strains isolated from sediments upstream and downstream of a water resource recovery facility (WRRF) over a two-year time period were tested for susceptibility to 13 antibiotics. Incidence of resistance to antibiotics, antibiotic resistance phenotypes, and diversity (based on resistance phenotypes) were compared in the two populations. At the beginning of the study, the upstream and downstream Aeromonas populations were different for incidence of antibiotic resistance (p < 0.01), resistance phenotypes (p < 0.005), and diversity. However, these differences declined over time and were not significant at the end of the study. These results (1) indicate that antibiotic resistance in Aeromonas in stream sediments fluctuates considerably over time and (2) suggest that WRRF effluent does not, when examined over the long- term, affect antibiotic resistance in Aeromonas in downstream sediment.

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Figures

Figure 1
Figure 1. Comparison of diversity in upstream and downstream Aeromonas populations based on antibiotic resistance phenotypes (Simpson's index of diversity)
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