Neutralizing antisera to human cytomegalovirus were produced in rabbits with alkaline-buffered extracts of infected cell cultures. The antibody activity was complement dependent and associated primarily with the 7S immunoglobulin fraction. Antisera with homologous K values greater than 10.00 were shown to be suitable for neutralization kinetic studies and were so used to examine the antigenic relatedness of strains AD169, Davis, Esp, C-87, Kerr, and Towne. Based upon the degree of relationship as determined by normalized K values, antisera to the Davis or AD169 strains discriminated three antigenic groups, and an antiserum to strain Esp discriminated two groups.
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Waner et al. (1978) studied this question.
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