Research Article

A Comparison of Nested PCR Assay with Conventional Techniques for Diagnosis of Intestinal Cryptosporidiosis in AIDS Cases from Northern India

Table 1

C. parvum detected in study subjects by the various methods and the sensitivity, specificity, and predictive values of the modified ZN staining and antigen ELISA ( ).

Diagnostic techniqueSubjects positive Number (%)SensitivitySpecificityNegative predictive valuePositive predictive value

Modified ZN staining17 (29.4)37.8%100%100%31.7%
C. parvum antigen ELISA 39 (67.3)86.6%100%100%68.4%
Nested PCR45 (77.5)