Abstract
Cultures of leucocyte cells were prepared from pig bone marrow, peripheral blood, lung washings, thymus and lymph nodes. Cell cultures were also prepared from peripheral blood from sheep, cattle and a human. Immunofluorescent (IF) staining of all these cultures, following inoculation with pig circovirus (PCV), detected virus replication in all the cell cultures derived from pigs and in the cell cultures derived from cattle. Virus replication in pig leucocyte cell cultures was confirmed by demonstrating the production of infectious virus. Double immunostaining of PCV infected cells using monoclonal antibodies specific for cell membrane markers indicated infection was confined to monocyte/macrophage cell types. No PCV antigen was detected in T or B cells in infected cell cultures.
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