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J Clin Microbiol. 1990 November; 28(11): 2462-2466
Characterization of prototype and clinically defined strains of Streptococcus suis by genomic fingerprinting.
J D Mogollon,
C Pijoan,
M P Murtaugh,
E L Kaplan,
J E Collins and
P P Cleary
Department of Large Animal Clinical Sciences, College of Veterinary Medicine, University of Minnesota, Minneapolis 55108.
ABSTRACT
A collection of Streptococcus suis strains from animal and human infections was examined for DNA-banding patterns after restriction endonuclease digestion and agarose gel electrophoresis. The endonuclease HaeIII produced the most discriminating restriction profiles among 23 serotypes studied. DNA from serotypes 9, 11, 12, and 16 was resistant to HaeIII cleavage. DNA from serotypes 9 through 16 was cleaved with HindIII and showed substantial genomic differences. We also examined 106 epidemiologically unrelated strains isolated from cases of pig meningitis or pneumonia and 5 strains isolated from cases of human meningitis in order to compare genomic fingerprinting and serotyping as epidemiological tools. Heterogeneity was found among fingerprints of serologically identical isolates, indicating genetic diversity within some serotypes. DNA fingerprints of some serotype 2 strains from different sources appeared identical, suggesting a clonal relationship among strains of this serotype. The data suggest that this technique represents an important tool for examining the natural history of disease caused by S. suis.
J Clin Microbiol. 1990 November; 28(11): 2462-2466
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Copyright © 1990 by the American Society for Microbiology. All rights reserved.