Eight optochin-susceptible (Opt(s)) alpha-hemolytic (viridans) streptococcus isolates were characterized at the molecular level. These isolates showed phenotypic characteristics typical of both viridans streptococci and Streptococcus pneumoniae. Comparison of the sequence of housekeeping genes from these isolates with those of S. pneumoniae, Streptococcus mitis, Streptococcus oralis, and Strept...

This study investigated the in vitro activity of gemifloxacin (SB-265805) against 50 recent clinical isolates of Streptococcus pyogenes, Streptococcus agalactiae and viridans streptococci using the microdilution method. This activity was compared with that of the quinolone agents ofloxacin, ciprofloxacin, levofloxacin, trovafloxacin and grepafloxacin, and with that of penicillin, ampicillin, cl...

The activity of quinupristin/dalfopristin was compared with that of other widely used antibiotics against 355 strains isolated from patients with endocarditis. MICs were determined by a standard agar dilution method. Quinupristin/dalfopristin was inhibitory at 1 mg/L for all coagulase-negative staphylococci (n = 36) and for the majority of Staphylococcus aureus strains (n = 87). The activity of...

We report a case of Pneumonia due to Streptococcus pneumoniae which was resistant to optochin in 50 yr old female patient who presented with high fever and chills to hospital. She also complained of productive cough. Sputum for microbiological evaluation was sent to lab from which streptococcus pneumoniae resistant to optochin was isolated .Isolate was resistant to major antibiotic used for pne...

Dear Editor, I read with interest the case report entitled " Aerococ-cus viridans urinary tract infection in a pediatric patient with secondary pseudohypoaldosteronism " by Leite and coworkers in Revista Argentina de Microbiología, volume 42, number 4. This report is important since it shows that aerococci can also cause disease in pediatric patients. Previous reports indicate that aerococci mo...

BACKGROUND Dalbavancin is a long-half-life (9-12 days) glycopeptide, now in Phase 3 development. Its pharmacokinetics may facilitate home intravenous therapy, early discharge and long prophylaxis. METHODS Dalbavancin and comparators were tested in vitro against staphylococci and streptococci to determine (i) activity and (ii) the comparability of agar dilution MICs by the BSAC and the NCCLS m...

Sheep blood agar containing 23.75 microgram of sulfamethoxazole and 1.25 microgram of trimethoprim (SXT-BA) per ml was compared with conventional sheep blood agar (SBA) for isolating group A and B streptococci from throat cultures. This selective medium allowed much better recovery of group A and B streptococci and suppressed the growth of the normal flora, including "viridans" streptococci. In...