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An enzyme linked immunosorbent assay (ELISA) for feline infectious peritonitis (FIP) virus serology is described. The assay is analogous to a previously developed indirect heterologous immunofluorescence test (IFT) in which transmissible gastroenteritis (TGE) viral antigen was used. Comparative testing of selected feline sera in both assays resulted in corresponding titers, which justifies the conclusion that the ELISA is a reliable test for the serology of FIP virus.
Two independent outbreaks of ectromelia in mice occurred in The Netherlands. In both cases, the causative virus was isolated and identified as ectromelia virus on the basis of serology, demonstration of antigen by indirect immunofluorescence, negative contrast electron microscopy, morphology of lesions on chorioallantoic membranes of embryonated chicken eggs, and cytopathogenicity for mouse cells. Inoculation of the virus into the dermis of rabbits demonstrated a low virulence for this species.
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