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Abstract
Antisera raised in rabbits against the porcine enterovirus strains V13 and T80 produced two precipitin lines in immunodiffusion tests with the homologous crude antigens, and a single precipitin line with each of ten heterologous porcine enteroviruses which were tested, and with poliovirus type 1, coxsackievirus B4 and equine rhinovirus type 1, but not with a bovine rhinovirus. C and D antigens prepared from V13 virus by density gradient centrifugation produced single precipitin lines with V13 antiserum. A single precipitin line was also formed when the heated crude antigens of V13 and T80 viruses were reacted with the homologous antisera, indicating destruction of the D antigen, and these lines fused with those produced by the heterologous viruses. It was concluded that porcine enteroviruses contain C and D antigens, and that the C antigen is responsible for the serological cross-reactivity demonstrated among porcine enteroviruses and other picornaviruses by immunodiffusion.
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