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Salmonella virchow PT 26 infection in England and Wales: a case control study investigating an increase in cases during 1994

Published online by Cambridge University Press:  15 May 2009

L. J. Willocks ,
D. Morgan ,
F. Sufi ,
L. R. Ward  and
H. E. Patrick
L. J. Willocks
Affiliation:
Oxfordshire Department of Public Health, Old Road, Headington, Oxford OX3 7LG
D. Morgan
Affiliation:
Regional Services, PHLS Communicable Disease Surveillance Centre, London NW9 5EQ
F. Sufi
Affiliation:
PHLS Statistics Unit, London NW9 5EQ
L. R. Ward
Affiliation:
Laboratory for Enteric Pathogens, PHLS, London NW9 5EQ
H. E. Patrick
Affiliation:
Regional Services, PHLS Communicable Disease Surveillance Centre, London NW9 5EQ
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Summary

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An increase in the number of human isolates of Salmonella virchow phage type (PT) 26 in England and Wales during 1994 was investigated. A national case control study was conducted which included 88 cases and 182 controls. The cases were mostly young adults (median age 26) and 13 (15%) were admitted to hospital. Acquisition of S. virchow PT 26 was associated with the consumption of any chicken (OR 2·5, CI 1·1–5·8), of chicken curry from restaurants and take aways (OR 2·9, CI 1·4–6·1), and of some other diverse types of pre-prepared chicken (OR 3·8, CI 1·9–7·6). Halal chicken was associated (P = 0·006) with illness in a subset. There were negative associations with contact with animals (OR 0·47, CI 0·23–0·95) and with the consumption of chicken cooked whole (OR 0·37, CI 0·21–0·66). The increase in S. virchow PT 26 may be due to changing epizoology and may be an indicator of what will become the dominant salmonella strain in poultry in future years. The increasing incidence of S. virchow PT 26 is of particular concern because of its association with more invasive disease in humans.

Type
Research Article
Information
Epidemiology & Infection , Volume 117 , Issue 1 , August 1996 , pp. 35 - 41
Copyright
Copyright © Cambridge University Press 1996

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