Fibroma regression in relation to antibody and challenge immunity to bovine papilloma virus.

摘要: Twelve neonate calves were repeatedly challenged with bovine papilloma virus. All initially susceptible to virus and complete resistance challenge occurred after the onset of fibroma regression. Fibroma regression was not correlated serum antibody titers as measured by an immunodiffusion assay. prior papillomatosis in 8 calves. In 4 that had later regression, papillomatosis, fibromas regressed, but fibropapillomas continued grow progressively.