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
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
Diagnostic microbiology and infectious disease, 42(4), 263-268 (2002-05-15)
Standard identification of Streptococcus pneumoniae by optochin and bile solubility testing can lead to ambiguous results for certain isolates. Newer bacteriologic identification techniques (e.g., DNA probes) now exist. In a prospective point prevalence study of oropharyngeal S. pneumoniae carriage rates
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
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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