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The shift of genetic subtypes of Escherichia coli O157[ratio ]H7 isolates from cattle

Published online by Cambridge University Press:  01 April 1999

M. AKIBA
Affiliation:
Laboratory of Zoonosis, Feed Safety Research Division, National Institute of Animal Health, Kannondai 3-1-1, Tsukuba, Ibaraki, 305-0856, Japan
T. SAMESHIMA
Affiliation:
Laboratory of Zoonosis, Feed Safety Research Division, National Institute of Animal Health, Kannondai 3-1-1, Tsukuba, Ibaraki, 305-0856, Japan
M. NAKAZAWA
Affiliation:
Laboratory of Zoonosis, Feed Safety Research Division, National Institute of Animal Health, Kannondai 3-1-1, Tsukuba, Ibaraki, 305-0856, Japan
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Abstract

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A total of 46 Escherichia coli O157[ratio ]H7 isolates were obtained from sequential faecal samples from seven cattle collected over periods of 2 months. Nine closely related genetic subtypes, determined by pulsed-field gel electrophoresis types using three kinds of restriction endonuclease were observed among the isolates. Distinguishable, but closely related genetic subtypes can be isolated from one farm, or from one cow, should be considered when undertaking an epidemiological survey.

Type
SHORT PAPER
Copyright
© 1999 Cambridge University Press