Rickettsia felis in cat fleas, Ctenocephalides felis parasitizing opossums, San Bernardino County, California
Rickettsia felis in cat fleas, Ctenocephalides felis parasitizing opossums, San Bernardino County, California
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DOI：
10.1111/j.1365-2915.2012.01017.x
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发表时间：
2012-12-01
影响因子：
1.9
通讯作者：
Eremeeva, M. E.
中科院分区：
文献类型：
--
作者：
Abramowicz, K. F.;Wekesa, J. W.;Eremeeva, M. E.
洛杉矶和奥兰治县是加州鼠斑疹伤寒的流行地区；然而，邻近的圣贝纳迪诺县最近没有关于跳蚤传播的立克次体病的报告。2007年，65只负鼠（Didelphis弗吉尼亚州）被困在圣贝纳迪诺县西南部郊区的住宅区和工业区。65只负鼠中有60只被跳蚤感染，主要是猫蚤（Ctenocephalides felis） （Bouche, 1835）。合并标本中蚤体立克次体最低感染率为13.3%，单蚤感染率为23.7%，共检出2种gltA基因型。尽管该地区有鼠斑疹伤寒的历史记录，但在本研究中未发现蚤中传播斑疹伤寒的证据。与在奥兰治县和洛杉矶县的猫跳蚤中发现斑疹伤寒致病菌相比，在这些猫跳蚤中没有发现斑疹伤寒致病菌的原因尚不清楚，需要在圣贝纳迪诺县进一步调查。
Los Angeles and Orange Counties are known endemic areas for murine typhus in California; however, no recent reports of flea-borne rickettsioses are known from adjacent San Bernardino County. Sixty-five opossums (Didelphis virginiana) were trapped in the suburban residential and industrial zones of the southwestern part of San Bernardino County in 2007. Sixty out of 65 opossums were infested with fleas, primarily cat fleas, Ctenocephalides felis (Bouche, 1835). The flea minimum infection rate with Rickettsia felis was 13.3% in pooled samples and the prevalence was 23.7% in single fleas, with two gltA genotypes detected. In spite of historic records of murine typhus in this area, no evidence for circulation of R. typhi in fleas was found during the present study. Factors contributing to the absence of R. typhi in these cat fleas in contrast to its presence in cat fleas from Orange and Los Angeles Counties are unknown and need to be investigated further in San Bernardino County.