| Epizootic
infections: characterized by age distribution of symptoms (ie very young piglets) and
the very rapid spread of infection. Another porcine coronavirus PEDV (Porcine Epidemic
Diarrhoea Virus) can cause similar clinical signs but the two viruses can be distinguished
serologically. Rising antibody levels in paired acute/convalescent sera will be seen. Enzootic
disease: test for viral antigens in frozen sections or scapings from the jejunum and
ileum of piglets by immunostaining (also seen in epizootic infections). Antibodies in sera
of 2-6 month old pigs indicate enzootic infection of the herd. |
