Jundishapur journal of microbiology, 9(4), e30708-e30708 (2016-06-16)
Streptococcus pneumoniae is still one of the major causes of morbidity and mortality worldwide. The prevalent serotype distribution had shown variation along different studies conducted at different time intervals. In order to efficiently assess the epidemiology of the diseases for
Clinical and diagnostic laboratory immunology, 10(4), 616-621 (2003-07-11)
For evaluating pneumococcal vaccines, the opsonophagocytic killing assay (OPKA) is useful as a supplement to the pneumococcal antibody enzyme-linked immunosorbent assay (ELISA). However, evaluations of pneumococcal vaccines require the determination of antibody responses to 7 to 11 serotypes, and the
The Journal of antimicrobial chemotherapy, 62(5), 973-977 (2008-08-08)
The aim of this work was to study the effect of subinhibitory concentrations of penicillin, chloramphenicol and erythromycin on the mutation rate of Streptococcus pneumoniae. The mutation rate to rifampicin and optochin resistance was estimated using fluctuation analysis in three
Antimicrobial agents and chemotherapy, 57(1), 254-260 (2012-11-02)
Fourteen fluoroquinolone-resistant streptococcal isolates with recombinant DNA topoisomerase genes, preliminarily identified as pneumococci, were further characterized using phenotypic and genotypic approaches. Phenotypic tests classified them as atypical pneumococci. Phylogenetic relationships were analyzed by using the sequences of seven housekeeping alleles
Journal of clinical microbiology, 46(6), 1930-1934 (2008-04-18)
Optochin susceptibility is a key test used for pneumococcal diagnosis, but optochin-resistant (Opt(r)) pneumococci have been reported in the last 2 decades. In this work, we characterized eight Opt(r) clinical strains which presented a new mutation, G47V, a predominant A49S
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