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    Consensus Report on Shigella Controlled Human Infection Model: Immunological Assays

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    Author
    Kaminski, R.W.
    Pasetti, M.F.
    Aguilar, A.O.
    Date
    2019
    Journal
    Clinical infectious diseases
    Publisher
    Oxford University Press
    Type
    Article
    
    Metadata
    Show full item record
    See at
    https://doi.org/10.1093/cid/ciz909
    Abstract
    Moderate to severe diarrhea caused by Shigella is a global health concern due to its substantial contribution to morbidity and mortality in children aged <5 years in low- and middle-income countries. Although antibiotic treatment can be effective, emerging antimicrobial resistance, limited access, and cost affirm the role of vaccines as the most attractive countermeasure. Controlled human infection models (CHIMs) represent a valuable tool for assessing vaccine efficacy and potentially accelerating licensure. Currently, immunological analysis during CHIM studies is customized based on vaccine type, regimen, and administration route. Additionally, differences in type of immunoassays and procedures used limit comparisons across studies. In November 2017, an expert working group reviewed Shigella CHIM studies performed to date and developed consensus guidelines on prioritization of immunoassays, specimens, and collection time points. Immunoassays were ranked into 3 tiers, with antibodies to Shigella lipopolysaccharide (LPS) being the highest priority. To facilitate comparisons across clinical studies, a second workshop was conducted in December 2017, which focused on the pathway toward a recognized enzyme-linked immunosorbent assay (ELISA) to determine serum immunoglobulin G titers against Shigella LPS. The consensus of the meeting was to establish a consortium of international institutions with expertise in Shigella immunology that would work with the National Institute for Biological Standards and Control to establish a harmonized ELISA, produce a reference sera, and identify a reliable source of Shigella LPS for global utilization. Herein we describe efforts toward establishing common procedures to advance Shigella vaccine development, support licensure, and ultimately facilitate vaccine deployment and uptake. Copyright The Author(s) 2019.
    Sponsors
    This supplement is sponsored by the Bill & Melinda Gates Foundation.
    Keyword
    Shigella
    human infection model
    immunoassays
    vaccine
    Identifier to cite or link to this item
    https://www.scopus.com/inward/record.uri?eid=2-s2.0-85076299283&doi=10.1093%2fcid%2fciz909&partnerID=40&md5=870ca2310219837c21932e68f7be16d7; http://hdl.handle.net/10713/11537
    ae974a485f413a2113503eed53cd6c53
    10.1093/cid/ciz909
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