Fig. 6

Indirect immunofluorescence of Cryptosporidium parvum oocysts. A: Control oocysts of Cryptosporidium parvum were purchased from the University of Arizona (https://acbs.cals.arizona.edu/crypto/purchasing). The oocysts had sizes ranging from approximately 4 to 6 μm (scale bar = 100 μm). B, C, and D: Clinical stool samples positive for Cryptosporidium spp