Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
2033925 | Biologicals | 2015 | 12 Pages |
Abstract
In this report we present the results of a collaborative study for the preparation and calibration of a replacement International Standard (IS) for Haemophilus influenzae type b polysaccharide (polyribosyl ribitol phosphate; 5-d-ribitol-(1 â 1)-β-d-ribose-3-phosphate; PRP). Two candidate preparations were evaluated. Thirteen laboratories from 9 different countries participated in the collaborative study to assess the suitability and determine the PRP content of two candidate standards. On the basis of the results from this study, Candidate 2 (NIBSC code 12/306) has been established as the 2nd WHO IS for PRP by the Expert Committee of Biological Standards of the World Health Organisation with a content of 4.904 ± 0.185 mg/ampoule, as determined by the ribose assays carried out by 11 of the participating laboratories.
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Authors
Fatme Mawas, Karena Burkin, Thomas Dougall, Manolya Saydam, Peter Rigsby, Barbara Bolgiano, the Hib PRP IS Working Group the Hib PRP IS Working Group,