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Appl Environ Microbiol. 1974 September; 28(3): 400-405
Copyright © 1974 American Society for Microbiology. All Rights Reserved.

Typing Herpesvirus hominis Antibodies and Isolates by Inhibition of the Indirect Hemagglutination Reaction

Viral and Rickettsial Disease Laboratory, California State Department of Health, Berkeley, California, 94704

ABSTRACT

Inhibition of the indirect hemagglutination reaction (IHA inhibition) was compared to several other methods for type-specific identification of Herpesvirus hominis (HVH) antibodies and isolates. The method appears to have the greatest value for typing antibodies for HVH type 1 and HVH type 2 in human sera; identification of antibody type was relatively simple and results were definitive. The IHA-inhibition test permitted serological diagnosis of HVH type 2 infection in three young adults with meningoencephalitis, thus extending the mounting evidence that nervous system involvement with this virus type is not limited to neonatal infections. II/I indexes of neutralizing or IHA antibody gave an accurate indication of the presence of HVH type 2 antibody in those sera containing type 2 antibody by IHA inhibition, but they indicated the presence of HVH type 2 antibody in one-half or more of the sera shown to contain only HVH type 1 antibody by IHA inhibition. For typing HVH isolates, the IHA-inhibition test gave results identical to those obtained by direct fluorescent-antibody staining using cross-absorbed conjugates, but the IHA-inhibition test was much more cumbersome and time-consuming to perform than was direct fluorescent-antibody staining. A microneutralization technique for virus typing also gave results identical to those obtained with direct fluorescent-antibody staining and IHA inhibition. However, typing HVH isolates by plaque size or the differential effect of incubation temperature was found to be less definitive and accurate.