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首页> 外文期刊>Journal of Clinical Microbiology >Serological and genotypic diversity among serogroup 5- reacting environmental Legionella isolates.
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Serological and genotypic diversity among serogroup 5- reacting environmental Legionella isolates.

机译：血清群5反应的环境军团杆菌分离株之间的血清学和基因型多样性。

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摘要

Five strains of bacteria (strains 684, 687, U7W, U8W, and MICU-B) that were biochemically and morphologically indistinguishable from Legionella pneumophila were recovered from the environment. Strains U7W, U8W, and MICU-B were antigenically identical to L. pneumophila strain Dallas 1E (serogroup 5), as determined by direct fluorescent antibody staining and immunodiffusion. Although strains 694 and 687 shared antigenic determinants with L. pneumophila Dallas 1E, they could be distinguished by immunodiffusion and differential absorption studies. However, as determined by DNA hybridization, the antigenically distinct strains 684 belong to the same DNA homology cluster as previously described authentic strains of L. pneumophila, whereas strain U7W, U8W, and MICU-B belong to a separate homology group. Therefore, two groups could be identified among these environmental isolates; one represents an antigenic subclass of serogroup 5 L. pneumophila (strains 684, and 687), and the other, although antigenically indistinguishable from serogroup 5 L. pneumophila, probably represents a new Legionella species (strains U7W, U8W, and MICU-B).
机译：从环境中回收了五种在生物学上和形态上与嗜肺军团菌无区别的细菌菌株（684、687，U7W，U8W和MICU-B菌株）。通过直接荧光抗体染色和免疫扩散测定，菌株U7W，U8W和MICU-B与肺炎嗜血杆菌菌株Dallas 1E（血清群5）在抗原上相同。尽管菌株694和687与嗜肺乳杆菌Dallas 1E共享抗原决定簇，但可以通过免疫扩散和差异吸收研究来区分它们。然而，如通过DNA杂交所确定的，抗原不同的菌株684属于与先前描述的嗜肺乳杆菌的真实菌株相同的DNA同源性簇，而菌株U7W，U8W和MICU-B属于单独的同源性组。因此，在这些环境分离物中可以鉴定出两组。一个代表5群肺炎嗜血杆菌的抗原亚类（684和687株），另一个代表与5群肺炎嗜血杆菌的抗原性没有区别，可能代表一种新的军团菌种（U7W，U8W和MICU-B株）。 。

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