Does using potting mix make you sick? Results from a Legionella longbeachae case-control study in South Australia
- 19 June 2006
- journal article
- research article
- Published by Cambridge University Press (CUP) in Epidemiology and Infection
- Vol. 135 (1), 34-39
- https://doi.org/10.1017/s095026880600656x
Abstract
A case-control study was performed in South Australia to determine if L. longbeachae infection was associated with recent handling of commercial potting mix and to examine possible modes of transmission. Twenty-five laboratory-confirmed cases and 75 matched controls were enrolled between April 1997 and March 1999. Information on underlying illness, smoking, gardening exposures and behaviours was obtained by telephone interviews. Recent use of potting mix was associated with illness (OR 4·74, 95% CI 1·65–13·55, P=0·004) in bivariate analysis only. Better predictors of illness in multivariate analysis included poor hand-washing practices after gardening, long-term smoking and being near dripping hanging flower pots. Awareness of a possible health risk with potting mix protected against illness. Results are consistent with inhalation and ingestion as possible modes of transmission. Exposure to aerosolized organisms and poor gardening hygiene may be important predisposing factors to L. longbeachae infection.Keywords
This publication has 10 references indexed in Scilit:
- Australia's notifiable diseases status, 2003 annual report of the National Notifiable Diseases Surveillance System.2005
- A review of national legionellosis surveillance in Australia, 1991 to 2000.2002
- Distribution of Legionella longbeachae and other legionellae in Japanese potting soilsJournal of Infection and Chemotherapy, 2001
- Legionnaires' Disease associated with potting soil--California, Oregon, and Washington, May-June 2000.2000
- Differences in health estimates using telephone and door-to-door survey methods-a hypothetical exerciseAustralian and New Zealand Journal of Public Health, 1998
- The ecology of Legionella longbeachae in Australia.1996
- Legionella longbeachae in Western Australia: a 12‐month retrospective reviewThe Medical Journal of Australia, 1996
- Nosocomial legionnaires' disease: Aspiration as a primary mode of disease acquisitionThe American Journal of Medicine, 1993
- Epidemiological characteristics of Legionella infection in South Australia: implications for disease controlAustralian and New Zealand Journal of Medicine, 1991
- Legionella longbeachae pneumonia: report of two casesThe Medical Journal of Australia, 1989