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KMID : 1130320070500020143
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Korean Journal of Pediatrics
2007 Volume.50 No. 2 p.143 ~ p.150
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Validation of enzyme immunoassay for the quantitative measurement of human IgG antibodies specific for Haemophilus influenzae Type b capsular polysaccharide
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Kim Kyung-Hyo
Lim Soo-Young
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Abstract
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Purpose: This study was conducted to validate enzyme immunoassay (EIA) for the quantitative measurement of human IgG antibodies specific for Haemophilus influenzae type b (Hib) capsular polysaccharide.
Methods: We evaluated specificity, repeatability, intermediate precision, accuracy, lower limit of quantification (LLOQ), and stability to validate standardized EIA for the quantitative measurement of human anti-polyribosylribitol phosphate (PRP) IgG antibodies.
Results: The results indicated that this EIA showed specificity to HbO-HA antigen and repeatability and intermediate precision were within acceptance criteria (repeatability: CV < or =15%, intermediate precision: CV < or =20%). The EIA-derived results from this laboratory were equivalent to those obtained by the standard radioactive antigen binding assay (RABA) for quantitation of anti-PRP antibodies in the 28 sera. Spiking recovery result was within acceptance criteria (100+/-20%). The precision and accuracy of samples in LLOQ were from -14.7 to -4.7% in nominal values, which were within acceptance criteria (precision: CV < or =25%, accuracy: +/-25%). Freeze-thaw stability and short term temperature stability were within +/-20% of acceptance criteria.
Conclusion: The EIA which is performed at the Center for Vaccine Evaluation and Study Ewha Medical Research Institute, is an appropriate serologic assay which can be used for quantitation of anti-PRP IgG antibodies in human sera.
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KEYWORD
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Haemophilus influenzae Type b, antibodies, enzyme immunoassay, Validation studies
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