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

Table 1

The ELISA kit’s results compared to the assembled gold standard test's results.

ELISA kit results	The combined gold standard test results^a
	Positive	Negative	Total
Positive	88	3^c	91
Negative	2^b	67	69
Total	90	70	160

aThe combined gold standard test comprising PCR assays and microscopy.
^bThese two samples with false-negative test results were diagnosed as negative by microscopy but Cryptosporidium-positive by the reference PCR assay (group-2).
^cThese three samples with false-positive test results were PCR negative for Giardia and Cryptosporidium and gave no reactions when individually tested by the two subsequent rapid tests.