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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

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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cReference is not peer reviewed and may not reflect a rigorous investigation of the outbreak.

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