Stat i USA By Dato Årsag Antal   berørte Nevada Las Vegas Jan.-April 1994 Cryptosporidium 100 syge 19 døde Missouri Gideon Nov. 1993 Salmonella 486 syge 4 døde Wisconsin Milwaukee Mar. 1993 Cryptosporidium 400,000 syge 104 døde Oregon Talent Maj 1992 Cryptosporidium 3,000 syge Pennsylvania Reading Aug. 1991 Cryptosporidium 551 syge Michigan Yankee Springs   Juni 1991 Acute gastrointestinal  1,320 syge Tennessee Brentwood Maj 1990 Acute gastrointestinal  1,000 syge Missouri Cabool Dec. 1989 E. coli bacteria 243 syge Alabama Collinsville Sept. 1989     Acute gastrointestinal  700 syge Arizona Sedona April 1989 Norwalk-like virus 900 syge Texas Travis County May 1988 Shigella sonnei 900 syge Pennsylvania Multiple sites Sept. 1987     Norwalk-like virus 5,000 syge Pennsylvania Blossburg April 1987 Giardia 513 syge Georgia Carrollton Jan. 1987 Cryptosporidium 13,000 syge