Article
Virulence of three distinct Cryptosporidium parvum isolates for healthy adults.
The Journal of infectious diseases - 1 Oct 1999
Okhuysen P C, Chappell C L, Crabb J H, Sterling C R, DuPont H L
Abstract excerpt
The infectivity of three Cryptosporidium parvum isolates (Iowa [calf], UCP [calf], and TAMU [horse]) of the C genotype was investigated in healthy adults. After exposure, volunteers recorded the number and form of stools passed and symptoms experienced. Oocyst excretion was assessed by immunofluorescence. The ID50 differed among isolates: Iowa, 87 (SE, 19; 95% confidence interval [CI], 48.67-126); UCP, 1042 (SE,...
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