Comparative analysis of genetic diversity and incidence of virulence factors and antibiotic resistance among enterococcal populations from raw fruit and vegetable foods, water and soil, and clinical samples
Abstract
A comparative study was carried out among enterococci isolated from fruits and vegetable foods, water and soil, and clinical samples. Results indicate strong differences in the numbers of enterococcal species found in different environments as well as their abundance. While Enterococcus faecalis was clearly the predominant species in clinical samples, Enterococcus faecium predominated in vegetables, and it slightly outnumbered E. faecalis in water samples. Other species (Enterococcus hirae, Enterococcus mundtii, Enterococcus durans, Enterococcus gallinarum and Enterococcus casseliflavus) were found more frequently in vegetables, water, and specially in soil. Isolates from vegetable foods showed a lower incidence of antibiotic resistance compared to clinical isolates for most antimicrobials tested, especially erythromycin, tetracycline, chloramphenicol, ciprofloxacin, levofloxacin, gentamicin and streptomycin for E. faecalis, and quinupristin/dalfopristin, ampicillin, penicillin, ciprofloxacin, levofloxacin, rifampicin, choramphenicol, gentamicin and nitrofurantoin for E. faecium. E. faecium isolates from vegetable foods and water showed an average lower number of antibiotic resistance traits (2.95 and 3.09 traits for vegetable ...Continue Reading
References
Population dynamics and antagonistic potential of enterococci colonizing the phyllosphere of grasses
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