ArticleScientific reports2025
Characterization of Enterococcus species in surface drinking water from Akoko Edo Nigeria reveals contamination levels and risks to public health.
Article in Scientific reports, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
This study focused on the assessment of drinking surface water for the presence and characteristics of Enterococcus species, which are indicative of water contamination and pose potential health risks to consumers. Our year-long investigation into several water bodies included using chromogenic medium and membrane filtering to isolate Enterococcus. The antimicrobial susceptibility of these bacteria was assessed through micro broth dilution, while virulence factors and biofilm formation were determined phenotypically. Resistance and virulence traits were detected using polymerase chain reaction (PCR) techniques. The study revealed varying bacterial densities measured in log10 CFU/100mL, with fecal coliforms, total coliforms, and Enterococcus species all present in the water, highlighting potential contamination issues. Enterococcus distribution showed a variety of species, with E. faecium being the most prevalent. Alarmingly, 63.9% of the isolates displayed multidrug resistance (MDR), and efflux pump genes associated with antimicrobial resistance were detected. The presence of virulence genes and genes associated with biofilm formation indicates the potential of these Enterococcus species to cause diseases and contribute to water quality problems. Given that this surface water serves as a drinking water source for local communities, the findings indicate a potential public health threat. The study provides crucial data for health professionals to conduct risk assessments, reducing the risk of health issues and enhancing consumer safety in relation to drinking water.
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