Journal of clinical microbiology
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J. Clin. Microbiol. · Jan 2012
Prevalence and sequence variation of panton-valentine leukocidin in methicillin-resistant and methicillin-susceptible staphylococcus aureus strains in the United States.
Panton-Valentine leukocidin (PVL), encoded by the lukSF-PV genes, is a putative virulence factor and marker for community-associated methicillin-resistant Staphylococcus aureus. Here we report the prevalence of PVL among a representative sample of 1,055 S. aureus infection isolates from the United States and describe the sequence variation of the lukSF-PV genes. We performed multilocus sequence typing (MLST) on all isolates and sequenced fragments of the lukSF-PV genes from a sample of 86 isolates. ⋯ Within CC8, all 38 MRSA (USA300) and all 28 MSSA isolates harbored the R variant. Of the 20 isolates from blood and the lower respiratory tract, 19 (95%) harbored the R variant. While the R variant had been linked primarily to USA300 MRSA, we found that all CC8 MSSA isolates also contained the R variant, suggesting that some strains of USA300 may have lost methicillin resistance as an adaptation in the community.
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J. Clin. Microbiol. · Jan 2012
Case ReportsA longitudinal case series description of meningitis due to Streptococcus gallolyticus subsp. pasteurianus in infants.
Streptococcus gallolyticus subsp. pasteurianus, previously known as Streptococcus bovis biotype II.2, is known to cause multiple infectious complications, including bacterial meningitis, in adults. Only sporadic individual case reports have identified this pathogen as a cause of meningitis in infants. ⋯ The 16S rRNA gene sequences of all 4 isolates were identical, and further were identical to 3 central nervous system (CNS) strains (two adults and one child) reported in existing literature. S. gallolyticus subsp. pasteurianus is an increasingly recognized cause of meningitis and bacteremia in the newborn period, and it merits further study with respect to etiology of infection.
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J. Clin. Microbiol. · Jan 2012
Case ReportsCapnocytophaga lung abscess in a patient with metastatic neuroendocrine tumor.
Capnocytophaga species are known commensals of the oral cavity of humans and animals (mainly dogs and cats) and are a rare cause of respiratory tract infections. We report a case of cavitary lung abscess caused by a Capnocytophaga species in a patient with a metastatic neuroendocrine tumor.