Walter Jakubowski

TL;DR: In healthy adults with no serologic evidence of past infection with C. parvum, a low dose of C.Parvum oocysts is sufficient to cause infection, and there were no secondary cases of diarrhea among household contacts.

TL;DR: Data indicate that prior exposure to C. parvum provides protection from infection and illness at low oocyst doses in healthy adults with pre-existing anti-C.Parvum antibodies.

TL;DR: Although the rates of diarrhea were comparable after each of the two exposures, the clinical severity as determined by the mean number of unformed stools passed was lower after reexposure, and the number of anti-Cryptosporidium immunoglobulin G and A seroconversions increased after secondary exposure, but the C. parvumserum antibody response did not correlate with the presence or absence of infection.

TL;DR: Goat serum did not interfere with the fluorescence of Giardia cysts or Cryptosporidium oocysts or the identification of cyst and oocyst internal structures, and 24 species showed some degree of fluorescence.