Division 2
United Kingdom
The presence of a singleton reactorf1 may be suspected where a single seropositive pig is detected and where the following criteria are met:
- (a)
there are no clinical signs of disease on the holding;
- (b)
there is no relevant history of clinical disease on the holding;
- (c)
there is no history of contact with a known outbreak of disease.
Annotations
Footnotes
- f1
-
A small proportion of singleton reactors can be detected by any of the current serological tests for swine vesicular disease. The factors responsible for singleton reactors are unknown. Serological cross-reactivity with swine vesicular disease virus might arise due to infection with another, as yet unidentified, picornavirus or may be due to other non-specific factors present in the serum.