Copro-antigen detection versus direct methods for the diagnosis of giadia lamblia in patients from the national liver institutes

Abstract EN

In this study a commercially- available immunoenzymatic assay to detect G.

lamblia specific copro-antigen was evaluated.

A total of 90 stool samples were tested.

Diagnosis of giardiasis by ELISA for copro-Ag detection was positive in 46 (51.1%) patients whereas by direct stool analysis after formol ether concentration G.

lamblia was detected in 38 (42.2%) patients only.

ELISA technique for detection of Giardia copro-antigen had a sensitivity of 97.3% and a specificity of 82.6% with PPV of 80.4 % and a NPV of 97.7 %.