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Clinical and Diagnostic Laboratory Immunology, Mar 1995, 132-137, Vol 2, No. 2
PK Holder, SE Maslanka, LB Pais, J Dykes, BD Plikaytis and GM Carlone
A new standard meningococcal reference serum designated CDC1992 was
prepared to replace meningococcal reference sera ECG and PB-2, which are
not available in sufficient quantities for continued use as primary
reference sera. CDC1992 was prepared from 14 healthy adult volunteers who
underwent plasmapheresis 4 to 12 weeks postvaccination with a single dose
of a Neisseria meningitidis quadrivalent polysaccharide vaccine. Total
and/or class-specific meningococcal serogroup A and C anticapsular antibody
concentrations (in micrograms per milliliter) were assigned to CDC1992 by
using homologous and heterologous enzyme- linked immunosorbent assay
(ELISA) formats. The reference serum ECG was used as a reference standard
to assign total anticapsular antibody concentrations to CDC1992 by a
homologous ELISA format. A heterologous ELISA format, with the Haemophilus
influenzae type b standard reference serum FDA 1983, was used to assign
total and class-specific antibody concentrations to CDC1992. Alkaline
phosphatase-labeled mouse anti- human monoclonal antibody conjugates were
used as secondary antibodies in both ELISA formats. The total,
immunoglobulin G (IgG), IgA, and IgM antibody concentrations, assigned to
CDC1992 for serogroup A were 135.8, 91.8, 20.1, and 23.9 micrograms/ml,
respectively, and those for serogroup C were 32.0, 24.1, 5.9, and 2.0
micrograms/ml, respectively. Meningococcal serogroup A and C antibody
concentrations were in good agreement when homologous and heterologous
ELISA format results were compared.(ABSTRACT TRUNCATED AT 250 WORDS)
Copyright © 1995 by the American Society for Microbiology. All rights reserved.
Assignment of Neisseria meningitidis serogroup A and C class-specific anticapsular antibody concentrations to the new standard reference serum CDC1992
Childhood and Vaccine-Preventable Diseases Immunology Section, Centers for Disease Control and Prevention, Atlanta, Georgia 30333.
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