Occurrence, Distribution, and Associations of O and H Serogroups, Colonization Factor Antigens, and Toxins of Enterotoxigenic Escherichia Coli

Overview

Journal Clin Microbiol Rev

Publisher American Society for Microbiology

Specialty Microbiology

Date 1997 Oct 23

PMID 9336662

Citations 131

Authors

M K Wolf

Affiliations

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Abstract

Enterotoxigenic Escherichia coli (ETEC) is a leading cause of infectious diarrhea worldwide. Four categories of antigens have been commonly studied: O serogroup, H serogroup, colonization factor antigens (CFA), and toxins. A database has been complied from published reports of nearly 1,000 ETEC isolates from 18 locations and analyzed to determine the occurrence, distribution, and associations of O serogroup, H serogroup, CFA, and toxin type. Tables listing the associations of antigens are presented. This analysis documents the widespread nature and variety of ETEC. Even the most common combination of antigens, O6:H16 CFA/II LTST, accounted for only 11% of the ETEC isolates in the database. It was isolated from 12 locations. Many phenotypes occurred only once. CFA detection based on enzyme-linked antibodies with polyclonal sera is suggested as the preferred assay. A combination of CFA and toxin-based antigens is suggested as the most practical vaccine.

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