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Isolation of a verotoxigenic Escherichia coli from the Tasmanian environment

journal contribution
posted on 2023-05-16, 10:27 authored by Manandhar, R, Silvana BettiolSilvana Bettiol, Bettelheim, KA, John GoldsmidJohn Goldsmid
Growing concerns on the emergence of verotoxin producing Escherichia coli (VTEC) in Australia have focused our attention on the possible sources of VTEC within the island state of Tasmania. An analysis of 156 food samples and 194 water samples obtained from various areas revealed evidence of eight possible sources. Six strains, with serotypes Ont:Hnt, O86:H-, O88:H-, O126:H21 and 0134:H-, were isolated from water samples. Two VTEC of serotypes Ont:H8, O81:H- were isolated from raw meat samples. The waterborne isolates produced verocytotoxin, VT1, while both foodborne isolates were strong producers of VT2. Three VTEC isolates produced haemolysins, only one produced enterohaemolysin (EntHly) and the remaining were reported with alpha-haemoiysin (alpha-Hly) activity. An important feature in the majority of isolates from water was their lack of ability to ferment lactose these isolates are routinely overlooked in public health laboratories.

History

Publication title

Comparative Immunology, Microbiology and Infectious Diseases

Volume

20

Pagination

271-279

ISSN

0147-9571

Department/School

Tasmanian School of Medicine

Publisher

Pergamon-Elsevier Science Ltd

Place of publication

Great Britain

Repository Status

  • Restricted

Socio-economic Objectives

Other health not elsewhere classified

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