The Preparation of the Fluorescence Antibody of Ovine Progressive Pneumonia Virus and the Detection of the Cell Infected by the Virus

The changes of sheep foetal lung cells infected by Ovine Progressive Pneumonia Virus(OPPV)were observed by.indirect immunofluorescence assay(IFA)and with the prepared fluorescence antibody of oppv.The result indicated that the fluorescence reaction initially appeared in 18 hours postinfection,The degree of the fluurescence reaction reached a high peak in 6 days postinfection and subsequently decreased.