Staphylococcus aureus

Bacteria

Biology

Gentamicin

Enterococcus faecalis

Aminoglycoside

Genetics

Streptomycin

Antibiotics

Microbiology

Enterococcus faecium

Amp resistance

Medicine

Vancomycin

Ampicillin

Enterococcus is one important cause hospital-acquired infections. High levels of resistance for aminoglycosides (HLAR) as gentamicin (HLGR) and streptomycin (HLSR) in Enterococcus isolates in a tertiary clinical care in Mexico City were studied. Identified using Microscan® system. Resistance to ampicillin, streptomycin, gentamicin and vancomycin according to NCCLS. HLGR and HLSR were confirmed using disks. 91 strains were isolated and identified from clinical samples from January 1998 to January 1999. Two species were identified. 83 (91.2 %) E. faecalis and 8/91 (8.8 %) were E. faecium. E. faecalis in urine samples were 67/91 (73.6%). Neither showed vancomycin or ampicillin resistance; 1/8 E. faecium was ampicillin resistant. 30/83 (36%) E. faecalis and 3/8 E. faecium were gentamicin resistant; while 39/83 (47.0%) E. faecalis and 4/8(50%) E. faecium were streptomycin resistant. 14/83 (16%) E. faecalis, 3/8 E. faecium showed sensitive pattern for gentamicin and streptomycin. None strains were -lactamases producer. E. faecalis 12/83 (14.4%) were HLGR and 28/83 (33.7%) were HLSR. E. faecium. 2/8 were HLGR and 2/8 were HLSR. HLAR 33/83 (39.7%) were E. faecalis and 3/8(37.5%) were E. faecium isolated from urine. E. faecalis was more frequent than E. faecium and show that HLAR in Enterococci is high and could be a serious problem if spread as nosocomial infection.

HIGH-LEVEL AMINOGLYCOSIDE RESISTANCE ENTEROCOCCUS SPP IN A TERTIARY CARE HOSPITAL IN MEXICO.