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:
The Journal of infectious diseases
影响因子:
--
通讯作者:
Gerlach,D
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

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评估了北美和欧洲化脓性链球菌侵袭性菌株的分子群体遗传学和致病潜力。从最近的侵入性感染和20世纪20年代和30年代的感染分离的特点是多位点酶基因型和等位基因变异的基因(speA)编码链球菌热原外毒素(SPE)A(猩红热毒素)。研究了编码SPE B和链激酶的基因中的等位基因变异的菌株子集。所有分配到合成SPE A的电泳类型(E1)1和2的当代菌株分别具有speA 2和speA 3等位基因变体,它们在两种小鼠模型中的相对毒力与早期回收的相同ET和M蛋白类型的菌株相似。相反,20世纪20年代和30年代发病的ET 1和2分离株含有peA 1等位基因。这些数据表明,克隆-毒力因子等位基因组合的发生可能存在时间和地理差异,这一观察结果可能部分解释了疾病频率、严重程度和特征的波动。
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.
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: --
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DOI: 10.1016/s0022-3476(05)82144-4
发表时间: 1991-03-01
影响因子: 5.1
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噬菌体链球菌:四种血清学类型的研究。
DOI: 10.2307/4581377
发表时间: 1934
影响因子: 3.3
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通讯作者: A. C. Evans
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发表时间: 1928-11-30
影响因子: 15.3
作者:
Lancefield, R C;Todd, E W
通讯作者: Todd, E W