Abstract Background Aerococcus species are Gram-positive cocci, with negative catalase and oxidase activities growth characteristics similar to viridans streptococci. They rarely cause infection in humans. However, there reports of bacteremia, meningitis, septic arthritis, endocarditis due this pathogen the literature. Herein we report a rare case pyelonephritis A. viridans. Case presentation A...

The Rapid Strep system (API System S.A., Montalieu-Vercieu, France) was evaluated, without additional tests, in the identification of 209 streptococci. Organisms included 59 beta-hemolytic, 36 group D, 24 Streptococcus pneumoniae, and 90 viridans group streptococci. The Rapid Strep system correctly identified to species level 69.5% of the beta-hemolytic strains, 100% of the group D strains, non...

To assess the role of glycocalyx production in the pathogenesis of endocarditis caused by viridans group streptococci in adult patients, glycocalyx production was examined for 49 blood culture isolates. The tryptophan assay, a quantitative spectrophotometric test, was used to measure cell-adherent glycocalyx production. Absorbance values of the isolates that produced endocarditis were significa...

Twelve hundred and twenty-seven clinical isolates and eighty stock strains of viridans streptococci were tested for serological and physiological characteristics. Because the serological reactions of these strains varied, a differentiation scheme could not be based on these reactions. For the same reason, there could be no correlation of serological characteristics with physiological characteri...

The Physicochemical characteristics of several kinds of toothpaste and natural powder samples and their antibacterial activity against Viridans streptococci bacteria have been studied in vitro. The Physicochemical analysis such as pH, conductivity, and moisture and fluoride concentration of the toothpaste and natural powder along with X-Ray Diffraction made in the consideration to indicating th...

We report a case of endocarditis due to a penicillin-"resistant" Streptococcus parasanguinis, discuss interpretations of the American Heart Association's guidelines for the treatment of viridans group streptococcal infection, and comment on therapy for infective endocarditis due to penicillin-resistant viridans group streptococci.

Rapid and accurate identification of Streptococcus pneumoniae is important for appropriate and prudent antimicrobial use in the treatment of lower respiratory tract infection. It is difficult to separate S. pneumoniae from commensal viridans group streptococci either by classical techniques or molecular methods. Aim of this study was to compare a commercially available multiplex PCR assay Seepl...

The Phoenix system (Becton Dickinson Diagnostic Systems, Sparks, MD) was evaluated for identification (ID) to the species level of streptococci and enterococci. Two hundred clinical isolates were investigated: beta-hemolytic streptococci (n = 50), Streptococcus pneumoniae organisms (n = 46), viridans group streptococci (n = 31), Enterococcus faecium (n = 36), Enterococcus faecalis (n = 25), and...

1. During the Spring of 1928, 29 patients with acute rheumatic fever were subjected to blood cultures, of whom 9, or 31 per cent, yielded a streptococcus. During the Spring of 1929, 31 patients with acute rheumatic fever were studied by blood cultures, of whom 26, or 83.9 per cent, yielded a streptococcus. The higher percentage of positive cultures in the 1929 series appears to have been due to...