Evaluation of an immunochromatographic test for alpha thalassaemia screening in a multi‐ethnic population

Nelson, Anna Clare, Motum, Penelope Irene, and Emeto, Theophilus I. (2019) Evaluation of an immunochromatographic test for alpha thalassaemia screening in a multi‐ethnic population. International Journal of Laboratory Hematology, 41 (3). pp. 397-403.

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Introduction The standard screening method for alpha thalassaemia is the examination of HbH preparation. It is labour intensive and poorly standardized. The development of a rapid strip immunochromatographic test (ICT) for haemoglobin Barts offers a fast, user friendly and cost‐effective alternative screening tool.

Method A total of 180 subjects with results of the thalassaemia screen and genetic testing were included. Results of the ICT and HbH preparation were correlated with genetic results to determine the performance characteristics of the tests and the effect of mean sample age on results.

Results Of 180 subjects, 111 carried alpha thalassaemia mutations and 69 participants had normal genetic results. The ICT had a sensitivity of 63.06% for all alpha gene mutations and 100% for both heterozygous alpha0 and HbH disease, with a specificity of 91.30%. Examination of HbH preparation had a sensitivity of 34.23% overall, detecting 89% of heterozygous alpha0 and 100% of HbH disease with a specificity of 98.55%. Sample age did not affect overall results.

Conclusions The ICT is a sensitive screening method for significant alpha mutations and detects the majority of homozygous alpha+ and nondeletional mutations. It demonstrates greater correlation with genetic testing than HbH preparation and could replace HbH preparation in the screening algorithm for alpha thalassaemia.

Item ID: 57303
Item Type: Article (Research - C1)
ISSN: 1751-553X
Keywords: alpha thalassaemia, Hb Barts, HbH preparation, immunochromatographic test, reproductive
Copyright Information: © 2019 John Wiley & Sons Ltd.
Date Deposited: 05 Mar 2019 00:45
FoR Codes: 42 HEALTH SCIENCES > 4202 Epidemiology > 420299 Epidemiology not elsewhere classified @ 30%
32 BIOMEDICAL AND CLINICAL SCIENCES > 3204 Immunology > 320406 Immunogenetics (incl. genetic immunology) @ 50%
32 BIOMEDICAL AND CLINICAL SCIENCES > 3202 Clinical sciences > 320213 Medical genetics (excl. cancer genetics) @ 20%
SEO Codes: 92 HEALTH > 9201 Clinical Health (Organs, Diseases and Abnormal Conditions) > 920101 Blood Disorders @ 30%
92 HEALTH > 9204 Public Health (excl. Specific Population Health) > 920404 Disease Distribution and Transmission (incl. Surveillance and Response) @ 20%
92 HEALTH > 9202 Health and Support Services > 920203 Diagnostic Methods @ 50%
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