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Distribution of multilocus genotypes of Escherichia coli within and between host families

Published online by Cambridge University Press:  19 October 2009

Dominique A. Caugant ,
B. R. Levin  and
R. K. Selander
Dominique A. Caugant
Affiliation:
Department of Biology, University of Rochester, Rochester New York 14627, USA
B. R. Levin
Affiliation:
Department of Zoology, University of Massachusetts, Amherst, Massachusetts 01003, USA
R. K. Selander
Affiliation:
Department of Biology, University of Rochester, Rochester New York 14627, USA
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Isolates from the intestinal Escherichia coli flora of 28 members of five families (including parents, children, and household pets) in Amherst, Massachusetts, and Rochester, New York, were characterized by the electrophoretic mobilities of 12 enzymes to estimate the extent of sharing of strains among associated and unassociated hosts. Among the 655 isolates examined, 60 different combinations of electromorphs (electrophoretic types or ETs), each representing a distinctive multilocus genotype, were identified, of which 85% were recovered from only a single individual. On average, 11 % of the ETs isolated from the same family were shared by two or more members; 4·9% of ETs were shared among members of unassociated families living in the same city; and only 2% were shared by families in different cities. All three ETs that were recovered from multiple hosts in the present study are widespread clones that have been isolated from many other host individuals in North America and Sweden.

Type
Research Article
Information
Journal of Hygiene , Volume 92 , Issue 3 , June 1984 , pp. 377 - 384
Copyright
Copyright © Cambridge University Press 1984

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