Geographic and temporal distribution and molecular characterization of two highly pathogenic clones of Streptococcus pyogenes expressing allelic variants of pyrogenic exotoxin A (Scarlet fever toxin).
Geographic and temporal distribution and molecular characterization of two highly pathogenic clones of Streptococcus pyogenes expressing allelic variants of pyrogenic exotoxin A (Scarlet fever toxin).
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表达热原性外毒素 A(猩红热毒素)等位基因变体的两个高致病性化脓性链球菌克隆的地理和时间分布及分子特征。
DOI:
10.1093/infdis/167.2.337
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发表时间:
1993
期刊:
影响因子:
--
通讯作者:
Gerlach,D
中科院分区:
文献类型:
--
作者:
Musser,JM;Kapur,V;Kanjilal,S;Shah,U;Musher,DM;Barg,NL;Johnston,KH;Schlievert,PM;Henrichsen,J;Gerlach,D
The molecular population genetics and pathogenic potential of North American and European invasive strains ofStreptococcus pyogeneswere assessed. Isolates from recent invasive infections and from infections in the 1920s and 1930s were characterized for multilocus enzyme genotype and allelic variation in the gene (speA) that encodes streptococcal pyrogenic exotoxin (SPE) A (scarlet fever toxin). A subset of strains was studied for allelic variation in genes that encode SPE B and streptokinase. All contemporary strains assigned to electrophoretic types (ETs) 1 and 2 that synthesize SPE A have thespeA2andspeA3allelic variants, respectively, and their relative virulence in two mouse models is similar to that of strains of the same ET and M protein types recovered earlier. In contrast, ET 1 and 2 isolates from disease episodes in the 1920s and 1930s contain thespeA1allele. The data suggest there may be temporal and geographic variation in the occurrence of clone-virulence factor allele combinations, an observation that may in part explain fluctuations in disease frequency, severity, and character.
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DOI:
10.1084/jem.71.4.539
发表时间:
1940-03-31
期刊:
The Journal of experimental medicine
影响因子:
--
作者:
Lancefield RC
通讯作者:
Lancefield RC
DOI:
10.1084/jem.81.6.573
发表时间:
1945-06-01
期刊:
The Journal of experimental medicine
影响因子:
--
作者:
Elliott SD
通讯作者:
Elliott SD
影响因子:
5.1
作者:
GIVNER, LB;ABRAMSON, JS;WASILAUSKAS, B
通讯作者:
WASILAUSKAS, B
影响因子:
3.3
作者:
A. C. Evans
通讯作者:
A. C. Evans
影响因子:
15.3
作者:
Lancefield, R C;Todd, E W
通讯作者:
Todd, E W