Rijpkema, S;
Hockley, J;
Logan, A;
Rigsby, P;
Atkinson, E;
Jin, C;
Goldblatt, D;
... anti-Vi IgG working group; + view all
(2018)
Establishment of the first International Standard for human anti-typhoid capsular Vi polysaccharide IgG.
Biologicals
, 56
pp. 29-38.
10.1016/j.biologicals.2018.09.001.
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Abstract
Vi capsular polysaccharide (Vi) conjugate vaccines, which can prevent typhoid in infants and young children, are being developed. Comparative immunogenicity studies are facilitated by an International Standard (IS) for human anti-Vi IgG. 16/138, a pool of sera from volunteers which received either Vi conjugate vaccine or plain Vi vaccine, was assessed as an IS alongside U.S. reference reagent Vi-IgGR1, 2011. Samples were tested in a commercial ELISA (n = 7), a standardised ELISA based on biotinylated Vi (n = 7) and in-house ELISAs (n = 7). Valid estimates were obtained for the potency of all samples in the commercial ELISA, and the commutability of 16/138 and Vi-IgGR1, 2011 was evident for the commercial ELISA and in-house ELISAs based on a coating of Vi and protein. The WHO Expert Committee on Biological Standardization established 16/138 as the first IS for anti-Vi IgG with 100 IU per ampoule and assigned 163 IU per vial of Vi-IgGR1, 2011.
| Type: | Article |
|---|---|
| Title: | Establishment of the first International Standard for human anti-typhoid capsular Vi polysaccharide IgG |
| Location: | England |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1016/j.biologicals.2018.09.001 |
| Publisher version: | http://doi.org/10.1016/j.biologicals.2018.09.001 |
| Language: | English |
| Additional information: | Copyright © The Author(s), 2018. This article is distributed under the terms of the Creative Commons Attribution 4.0 License (http://www.creativecommons.org/licenses/by/4.0/) |
| Keywords: | ELISA, IgG, International standard, Polysaccharide, Typhoid, Vi |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences > Faculty of Population Health Sciences > UCL GOS Institute of Child Health UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences > Faculty of Population Health Sciences > UCL GOS Institute of Child Health > Infection, Immunity and Inflammation Dept |
| URI: | https://discovery-pp.ucl.ac.uk/id/eprint/10057172 |
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