Evaluation of an Immunoassay-Based Algorithm for Screening and Identification of Giardia and Cryptosporidium Antigens in Human Faecal Specimens from Saudi Arabia

Table 4

Diagnostic tests’ results on 250 random stool samples.

Test result	Microscopy	The algorithm^a	The reference PCRs^b
Cryptosporidium-positive	13	24	26
Giardia-positive	33	42	42
Cryptoc/Giardia-negative	204	184	182
Total	250	250	250

aThe algorithm picked 20 positive samples more than the staining methods adopted at the Microbiology Laboratory at King Faisal Hospital. These samples were also positive for protozoan DNA by the matching reference PCR assay. ^bTwo Cryptosporidium DNA positive samples were diagnosed by PCR and missed by the algorithm. ^cCrypto stands for Cryptosporidium.