Streptococcus pneumoniae

Age, Serotypes Determine Infectiousness

Published in TB and Outbreaks Week, July 10th, 2001

by N.R. Saltmarsh, staff medical writer - Both bacterial virulence factors and host factors figure into the selection of Streptococcus pneumoniae serotypes causing invasive infection, say researchers working in Chile.

J. Inostroza and colleagues collected all clinical S. pneumoniae specimens isolated from patients with invasive or sterile-site infections admitted to a regional general hospital in southern Chile during a five-year period.

They isolated 50 serotypes comprising 247 strains - 69 in patients younger than five, 129 in patients five to 64 years old, and 49 from patients 65 and older. Eight serotypes were common to all three...

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Source: TB and Outbreaks Week (2001-07-10)

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