Antibiotic resistance and virulence traits in clinical and environmental Enterococcus faecalis and Enterococcus faecium isolates.

This study compared virulence and antibiotic resistance traits in clinical and environmental Enterococcus faecalis and Enterococcus faecium isolates. E. faecalis isolates harboured a broader spectrum of virulence determinants compared to E. faecium isolates. The virulence traits Cyl-A, Cyl-B, Cyl-M, gel-E, esp and acm were tested and environmental isolates predominantly harboured gel-E (80% of E. faecalis and 31.9% of E. faecium) whereas esp was more prevalent in clinical isolates (67.8% of E. faecalis and 70.4% of E. faecium). E. faecalis and E. faecium isolated from water had different antibiotic resistance patterns compared to those isolated from clinical samples. Linezolid resistance was not observed in any isolates tested and vancomycin resistance was observed only in clinical isolates. Resistance to other antibiotics (tetracycline, gentamicin, ciprofloxacin and ampicillin) was detected in both clinical and water isolates. Clinical isolates were more resistant to all the antibiotics tested compared to water isolates. Multi-drug resistance was more prevalent in clinical isolates (71.2% of E. faecalis and 70.3% of E. faecium) compared to water isolates (only 5.7% E. faecium). tet L and tet M genes were predominantly identified in tetracycline-resistant isolates. All water and clinical isolates resistant to ciprofloxacin and ampicillin contained mutations in the gyrA, parC and pbp5 genes. A significant correlation was found between the presence of virulence determinants and antibiotic resistance in all the isolates tested in this study (p<0.05). The presence of antibiotic resistant enterococci, together with associated virulence traits, in surface recreational water could be a public health risk.

Rathnayake IU ，Hargreaves M ，Huygens F 《-》

[The relationship between antibiotic resistance and virulence factors in urinary Enterococcus isolates].

Baylan O ，Nazik H ，Bektöre B ，Citil BE ，Turan D ，Ongen B ，Ozyurt M ，Açıkel CH ，Haznedaroğlu T ... -  《MIKROBIYOLOJI BULTENI》

Molecular screening of virulence genes in high-level gentamicin-resistant Enterococcus faecalis and Enterococcus faecium isolated from clinical specimens in Northwest Iran.

Hasani A ，Sharifi Y ，Ghotaslou R ，Naghili B ，Hasani A ，Aghazadeh M ，Milani M ，Bazmani A ... -  《-》

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.

Abriouel H ，Omar NB ，Molinos AC ，López RL ，Grande MJ ，Martínez-Viedma P ，Ortega E ，Cañamero MM ，Galvez A ... -  《INTERNATIONAL JOURNAL OF FOOD MICROBIOLOGY》

Risk factors in enterococci isolated from foods in Morocco: determination of antimicrobial resistance and incidence of virulence traits.

Valenzuela AS ，Omar NB ，Abriouel H ，López RL ，Ortega E ，Cañamero MM ，Gálvez A ... -  《FOOD AND CHEMICAL TOXICOLOGY》