Saheli Bhadra Sneha Mohan Tarana Sarwat NG Gopeshwor Sachin K Sharma Dalip K Kakru


Background: Hepatitis B virus (HBV) infection is one of the leading causes of death in developing countries. The most important
marker for HBV diagnosis is detection of Hepatitis B surface antigen in blood.
Objective: The aim of this study was to compare the analytical sensitivity of a rapid card test in comparison to Enzyme-Linked
Immunosorbent Assay (ELISA) which is considered a Gold Standard technique for the detection of HBsAg in blood samples
received for HBsAg test in serology section of Microbiology Department, Central Laboratory, Sharda Hospital.
Methods: Cross-sectional observational study was conducted at the Department of Microbiology, School of Medical Sciences &
Research for a period of 12 months from 1st November 2020 to 31st October 2021. The two different brands by which multiple
parameters were analyzed were HEPACARD and Erba Lisa SEN HBsAg.
Results: A total of 13939 blood samples were received for HBsAg diagnosis. For the study purpose, from the total of 13939
samples, 386 were randomly selected to be included in the study with 193 positive samples and 193 negative samples. The
sensitivity and specificity of Rapid card were 95.83% and 100% respectively. The Positive predictive value and Negative
predictive value of Rapid card were 100% and 95.65% respectively for HBsAg detection.
Conclusion: It can be concluded that, an ideal rapid test is a boon in time-saving situations. Since HBsAg screening by a rapid
test is easier, cost effective, time saving can be easily performed by any trained health care worker at any time of need. Hence,
HBsAg screening can be preferable done by a Rapid card test followed by a supplemental ELISA and Polymerase chain reaction
for further confirmation. Good sensitivity and specificity of Immuno-chromatography test (ICT) for early detection of HBsAg
was observed.


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Hepatitis B virus, Hepatitis B surface Antigen, ELISA and Rapid Card Test

Original Article