So circovirus decreases the efficiency of CSF- Classical Swine Fever vaccine!
Now let’s go back to 2000. Britain was suffering, a more or less undeclared even, secret, PMWS-PDNS (Circovirus) epidemic and the real thing - CSF, the dreaded Classical Swine Fever, not a vaccine, arrived in Britain.
So circovirus would presumably reduce any natural defences against CSF (and perhaps the follow up FMD – Foot and Mouth epidemic too)
The cheekily named "Gardiner Hypothesis" see above, suggested circovirus renders pigs more liable to other diseases and the extraordinary personal story told in Stop the World is now explained.
Porcine Circovirus is a very nasty virus and it has been present in Britain since 1999 rendering the pigs liable to other diseases. It rivals the British government veterinarians for sneaky behaviour and it caught them out in 2000 and 2001.
The CSF and FMD (Foot and Mouth) epidemics were major national disasters, with consequential animal cruelty, human anguish and huge national financial losses.
This report makes the connection clear:
“This PCV2-derived interference may not only allow the invasion of wild-type CSFV in pig farms but also increases the difficulty of CSF prevention and control in CSF endemic areas.”
Porcine circovirus type 2 (PCV2) infection decreases the efficacy of an attenuated classical swine fever virus (CSFV) vaccine
Published: 1 December 2011