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Antibody-forming Cell Assays of Avian Paramyxoviruses: Immunization of Chickens Demonstrates Two Serotype Groups

Department of Veterinary Pathology, The Royal Veterinary College, University of London, Royal College Street, London NW1 0TU, U.K.

Chickens were immunized with eight different serotypes of avian paramyxovirus (PMV). Ninety percent of splenic IgG antibody-forming cells (AFC) were serotype-specific with respect to the glycoprotein and nucleoprotein-polymerase antigens in an indirect immunoperoxidase binding system. The IgG AFCs which cross-reacted between serotypes divided the serotypes into two mutually exclusive super serogroups composed of PMV-1, -3, -4, -7 and -9, and PMV-2, -6 and -8. PMV-5 was not tested.

Keywords: paramyxoviruses, avian, AFC assay, chickens

Received 23 February 1989; accepted 12 June 1989.