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Published on: November 23, 2012
Identification of a high-virulence clone of serotype III Streptococcus agalactiae by growth characteristics at 40
S J Mattingly1, J J Maurer, E K Eskew
1Department of Microbiology, University of Texas Health Science Center, San Antonio 78284.
Abstract:
A high-virulence clone of serotype III Streptococcus agalactiae causing invasive neonatal disease was previously identified by multilocus enzyme electrophoresis. A simple procedure involving growth at 40 degrees C distinguished all isolates classified in this high-virulence clone from other serotype III isolates, which are more frequently associated with asymptomatically colonized infants, as well as the other serotypes of group B streptococci. The high-virulence clone failed to grow at 40 degrees C in FMC, a chemically defined medium, in contrast to the other organisms, which grew readily.
