Ampicillin- and Multidrug-Resistant Escherichia coli and Enterococcus spp. in Costa Rican Wastewater and Surface Water

This dataset contains the data that corresponds to the information included in 'Ampicillin- and Multidrug-Resistant Escherichia coli and Enterococcus spp. in Costa Rican Wastewater and Surface Water' (in review). The data include measurements of concentrations of total and ampicillin-resistant fecal indicator bacteria (E. coli and enterococci) from four sites in and near a wastewater treatment plant in Puntarenas, Costa Rica. The four sites at which samples were collected were the influent from hospital wastewater, influent from residential wastewater, treated wastewater effluent, and the estuary in which treated effluent is discharged. Frequency of ampicillin resistance is recorded, and ampicillin-resistant isolates were confirmed to species or genus before further testing. Multidrug resistance testing was conducted via the Kirby Bauer assay, and the zones of inhibition for each isolate, as well as the interpretation (resistant, intermediate, and sensitive), are provided. Samples were collected from each site during four sampling events from October to November 2019.