An outbreak of cryptosporidiosis associated with a resort swimming pool.
An outbreak of cyptosporidiosis occurred in late April 1993 among resort hotel guests which was temporally associated with, but geographically distant from, a massive waterborne outbreak of cryptosporidiosis in Milwaukee, Wisconsin, that occurred in late March and early April of 1993. A case-control study was performed among groups with members who reported illness and among a systemic sample of groups who stayed at the resort hotel during the risk period. Of 120 persons interviewed, 51 (43%) met the case definition. Swimming in the resort hotel's pool was significantly associated with case status (OR = 9.8; 95% Cl 3.4, 29.7), as was consumption of ice from the hotel's ice machines (OR = 2.3; 95% Cl 1.01, 5.2). When analysis was restricted only to laboratory-confirmed cases and controls, swimming pool use was the only risk factor significantly associated with illness (OR = 13.0; 95% Cl 2.6, 88.7). Following waterborne outbreaks of cryptosporidiosis associated with water supplies, swimming pools should be considered as possible ongoing sources for transmission regionally.
MacKenzie
W R
WR
CDC, EPO, DFE, MS C-08, Atlanta, GA 30333, USA.
Kazmierczak
J J
JJ
Davis
J P
JP
D000293:Adolescent; D000328:Adult; D000368:Aged; D000818:Animals; D016022:Case-Control Studies; D002648:Child; D002675:Child, Preschool; D003457:Cryptosporidiosis / Q000453:epidemiology* / Q000469:parasitology / Q000635:transmission; D016785:Cryptosporidium parvum / Q000302:isolation & purification*; D004196:Disease Outbreaks; D005243:Feces / Q000469:parasitology; D005260:Female; D005767:Gastrointestinal Diseases / Q000453:epidemiology / Q000469:parasitology; D006294:Health Resorts; D006801:Humans; D007411:Intestinal Diseases, Parasitic / Q000453:epidemiology / Q000469:parasitology / Q000635:transmission; D008297:Male; D008875:Middle Aged; D012307:Risk Factors; D013551:Swimming Pools; D014871:Water Microbiology; D014922:Wisconsin / Q000453:epidemiology