Selim S, Nassef N, Sharaf S, Badra G, Abdel-Atty D
Copro-antigen detection versus direct methods for the diagnosis of Giardia lamblia in patients from the National Liver Institute. [Journal Article]
J Egypt Soc Parasitol 2009 Aug; 39(2):575-83.
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%.
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