Abstract
Serologic responses to proteins of rotavirus serotypes G1, P1A[8]; G2, P1B[4]; G3, P1A[8]; and G4, P2A[6] were evaluated by immunoblotting paired sera from 17 children with primary rotavirus infection. Ten children were infected with G1, P1A[8]; five with G4, P1A[8]; and two with G4, P2A[6] viruses. Anti-VP6 and anti-VP2 were seen in most responses. Homotypic anti-VP7 developed following G1 and G4 infections in 8 (80%) and 6 (86%) cases, respectively. Homotypic anti-VP4 developed in 9 (60%) cases following P1A[8] infection and in 0 of 2 cases following P2A[6] infection. Heterotypic anti-VP7 appeared against G4 (20%) and G3 (20%) following the 10 G1 infections, and against G3 (86%) and G1 (57%) following the 7 G4 infections. Heterotypic anti-VP4 occurred in only 3 (18%) children. The data show the antigenic predominance of internal proteins VP6 and VP2. Homotypic antibodies developed against VP7 but not against VP4 in most cases, while heterotypic antibodies were infrequent.
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