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Volume 5, Number 4—August 1999
Dispatch

Chlorine Disinfection of Recreational Water for Cryptosporidium parvum

Colleen Carpenter*, Ronald Fayer*Comments to Author , James Trout*, and Michael J. Beach†
Author affiliations: *U.S. Department of Agriculture, Beltsville, Maryland, USA and †Centers for Disease Control and Prevention, Atlanta, Georgia, USA

Main Article

Table 1

Outbreaks of cryptosporidiosis in recreational water facilities

Facility Location Disinfectant No.of cases estimated/confirmed) Date (year) Ref.
Pool Doncaster, UK Chlorine a/79 1988 2
Pool Los Angeles County Chlorine 44/5 1988 3
Pool British Columbia Chlorine 66/23 1990 4
Pool Gloucestershire, UK Ozone/chlorine a/13 1992 5
Water slide Idaho Chlorine 500/a 1992 6
Pool (wave) Oregon Chlorine a/52 1992 7
Pool (motel) Wisconsin Chlorine 51/22 1993 8,9
Pool (motel) Wisconsin Chlorine 64/b 1993 9
Pool Wisconsin Chlorine 5/b 1993 9
Pool Wisconsin Chlorine 54/b 1993 9
Pool (motel) Missouri Chlorine 101/26 1994 10
Lake New Jersey None 2,070/46 1994 11
Pool Sutherland, New South Wales Chlorine a/70 1994 12
Pool Kansas a 101/26 1995 13
Water park Georgia Chlorine 2,470/62 1995 13
Water park Nebraska a a/14 1995 13
Pool Florida a 22/16 1996 14c
Water park California Chlorine 3,000/29 1996 13,15c
Pool Andover, UK Chlorine 8/a 1996 16
Lake Indiana None 3/a 1996 13
River NW England & Wales None 27/7 1997 17c
Pool SW England & Wales Ozone & chlorine a/9 1997 17c
Fountain Minnesota Sand filter 369/73 1997 18
Three pools Canberra, Australia a a/210 1998 19c,20c
Pool Oregon a 51/8 1998 21c
Pools Queensland a 129/a 1997 21c
Pools New South Wales a 370/a 1998 22c
Pools Hutt Valley, New Zealand a a/171 1998 23c

aNo data available.
bReference did not identify cases as estimated or confirmed.
cReference is not peer reviewed and may not reflect a rigorous investigation of the outbreak.

Main Article

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The conclusions, findings, and opinions expressed by authors contributing to this journal do not necessarily reflect the official position of the U.S. Department of Health and Human Services, the Public Health Service, the Centers for Disease Control and Prevention, or the authors' affiliated institutions. Use of trade names is for identification only and does not imply endorsement by any of the groups named above.
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