Multidrug-resistant enterococcal nosocomial invasive infections are a rising concern faced by the medical community. Not many options are available to treat these highly virulent organisms. Risk factors for developing these highly resistant organisms include prolonged hospital stay, previous antibiotic use, and immunosuppression. In this article, we report a case of daptomycin-resistant enteroc...

MIC results for 115 Staphylococcus intermedius group isolates are presented. Of these, 33% were methicillin resistant, among which 51.4% were susceptible to doxycycline, 29.7% to clindamycin, and 21.6% to trimethoprim-sulfamethoxazole. All of the isolates were susceptible to ceftaroline, daptomycin, linezolid, nitrofurantoin, quinupristin-dalfopristin, rifampin, tigecycline, and vancomycin. Of ...

Dalbavancin, tested against 146 staphylococci, was more potent than other drugs tested, with an MIC at which 50% of staphylococci were inhibited of 0.03 microg/ml and an MIC at which 90% of staphylococci were inhibited of 0.06 microg/ml by microdilution. For all strains, MICs of vancomycin, linezolid, ranbezolid, oritavancin, daptomycin, and quinupristin-dalfopristin were </=4.0 microg/ml. Dalb...

This study was performed to determine the susceptibility patterns and the colonization rate of Group B Streptococcus (GBS) in a population of pregnant women. From January 2004 to December 2006, vaginal-rectal swabs were obtained from 1105 women attending Dr. Ramón Madariaga Hospital, in Posadas, Misiones, Argentina. The carriage rate of GBS among pregnant women was 7.6%. A total of 62 GBS strai...

The rapid emergence of strains of Enterococcus faecium with high-level resistance to vancomycin (VREF) has created a serious therapeutic void in the management of enterococcal infection. As for vancomycin-susceptible enterococci, serious infection with VREF strains frequently occurs in debilitated or immunocompromised hosts with significant underlying disease. Several recent series report an in...

During 10 years penicillin resistance among clinical isolates of S. pneumoniae was more or less stable. The cumulative proportion of penicillin non susceptible S. pneumoniae (PNSP) was 13.0%; 7.2% when isolates with MIC = 2 mg/l were considered. Among PNSP only 2 strains were isolated from sterile body fluids, one having MIC >3.84 mg/l. Lack of susceptibility to cotrimoxazole was 38.4%. All iso...