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- Title
A Community Outbreak of Cryptosporidiosis in Sydney Associated with a Public Swimming Facility: A Case-Control Study.
- Authors
Mayne, Darren J.; Ressler, Kelly-Anne; Smith, Diane; Hockey, Gareth; Botham, Susan J.; Ferson, Mark J.
- Abstract
In February, 2008, the South Eastern Sydney Illawarra Public Health Unit investigated an outbreak of cryptosporidiosis within the south east region of Sydney, Australia. Thirty-one cases with laboratory-confirmed cryptosporidiosis and 97 age- and geographically matched controls selected by random digit dialling were recruited into a case-control study and interviewed for infection risk factors. Cryptosporidiosis was associated with swimming at Facility A (matched odds ratio = 19.4, 95% confidence interval: 3.7-100.8) and exposure to household contacts with diarrhoea (matched odds ratio = 7.7, 95% confidence interval: 1.9-31.4) in multivariable conditional logistic regression models. A protective effect for any animal contact was also found (matched odds ratio = 0.2, 95% confidence interval: 0.1-0.7). Cryptosporidium hominis subtype IbA10G2 was identified in 8 of 11 diagnostic stool samples available for cases. This investigation reaffirms the importance of public swimming pools as potential sources of Cryptosporidium infection and ensuring their compliance with water-quality guidelines. The protective effect of animal contact may be suggestive of past exposure leading to immunity.
- Subjects
ILLAWARRA (N.S.W.); SYDNEY (N.S.W.); NEW South Wales; CRYPTOSPORIDIOSIS; SWIMMING pools; PUBLIC health surveillance; SAFETY
- Publication
Interdisciplinary Perspectives on Infectious Diseases, 2011, p1
- ISSN
1687-708X
- Publication type
Case Study
- DOI
10.1155/2011/341065