Incidence of lysogenic, colicinogenic and siderophore producer strains among human saprophytic Escherichia coli.

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Publikace nespadá pod Pedagogickou fakultu, ale pod Lékařskou fakultu. Oficiální stránka publikace je na webu muni.cz.
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ŠMARDA Jan ŠMAJS David HORYNOVÁ Sabina

Rok publikování 2006
Druh Článek v odborném periodiku
Časopis / Zdroj Folia Microbiologica
Fakulta / Pracoviště MU

Lékařská fakulta

Citace
Obor Mikrobiologie, virologie
Klíčová slova Escherichia coli; human intestinal strains; colicinogeny; lysogeny; siderophore
Popis The current incidence of E. coli strains in healthy humans capable of producing the inhibitive exoproducts such as temperate bacteriophages, corpuscular or HMW (high molecular weight) and proteinaceous or LMW (low molecular weight) colicins and siderophores was studied. 53 Escherichia coli strains were collected from the colons of 53 healthy human volunteers in Brno, Czech Republic. The strains were then tested for spontaneous and induced production of inhibitive exoproducts in a cross-test against each other. Of the strains tested, 39.6% produced bacteriophages, 43.4% of strains produced from one to several LMW colicins. Only 5.7% of strains formed HMW colicins. And 15.1% of strains (eight strains) produced exocellular siderophores different from enterochelin. Of the eight strains, seven strains formed aerobactin and one strain formed an untyped siderophore. E. coli strains differ greatly in the incidence of colicinogeny and lysogeny from its closest systemic relatives in the genus Escherichia and therefore should not be regarded as a model bacterium in this respect.
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