Negative for routine bacteria, rotavirus/adenovirus antigen, Giardia antigen, and Clostridium difficile antigen. Routine stool examination for enteric parasites is negative.
Modified Ziehl-Neelsen staining of smear shows several Cryptosporidium oocysts. The Cryptosporidium antigen is detected by a Lateral Flow Test (LFT).
The polymerase chain reaction-restriction fragment length polymorphism (PCR/ RFLP) reveals Cryptosporidium parvum.