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Post-weaning multisystemic wasting syndrome (PMWS) is a comparatively new disease of swine, and known to occur in France since 1996. A porcine circovirus type 2 (PCV2) is found in the lesions of affected piglets. Six piglets aged 10-13 weeks were obtained from a French PMWS-affected farm. Two showing characteristic signs of PMWS (palor, weakness and(More)
Twelve pigs were experimentally infected with a porcine respiratory coronavirus (PRCV) by the oronasal route. Viral excretion was measured daily by two means-deep nasal swabs and air samples obtained in a cyclone sampler. Clinical signs were very slight on infected pigs. Airborne virus could be recovered from day 1 to day 6 post-infection in the cyclone(More)
In three successive experiments, the immune functions of pigs persistently infected with the porcine reproductive and respiratory syndrome virus (PRRSV) have been evaluated. Non-specific immune responses were analyzed over a period of 12 weeks post-infection (PI). In addition, the capacity of PRRSV-infected pigs to develop an efficient immune response(More)
Five groups of eight fattening pigs were vaccinated and then infected with Aujeszky's disease virus. Viral excretion was evaluated by two means: deep nasal swabbing and air sampling. It appeared that infectious airborne virus could be recovered from day 1 to day 6 after infection in the isolated units where control animals were raised. In vaccinated(More)
Four attenuated glycoprotein I deleted Aujeszky's disease virus (ADV) vaccines were compared on the basis of their ability to induce immunity in the presence of passive antibodies. The relative severity of clinical disease and amount of viral excretion following experimental challenge with virulent ADV were determined among groups of eight pigs that were(More)
Seven deleted Aujeszky's disease vaccines were compared for their ability to induce an immunity which suppresses virus excretion. For each vaccine, the levels of clinical protection and viral excretion were compared. Groups of eight pigs were vaccinated twice with attenuated deleted Aujeszky's disease vaccines (which do not express certain glycoproteins:(More)
A better understanding of cell-mediated immune responses to classical swine fever virus (CSFV) is essential for the future development of improved vaccines. We analyzed the generation of cell-mediated and humoral immune responses in d/d histocompatible pigs following CSFV infection or vaccination. Viral infection induced high T cell responses with high(More)
African swine fever (ASF) is an acute haemorrhagic disease of domestic pigs for which there is currently no vaccine. We showed that experimental immunisation of pigs with the non-virulent OURT88/3 genotype I isolate from Portugal followed by the closely related virulent OURT88/1 genotype I isolate could confer protection against challenge with virulent(More)
Eleven groups of 8 pigs were vaccinated with different vaccinal strains of pseudorabies virus deleted or not for non-essential glycoproteins (gI, gX, gp 63), then were challenged 8–9 weeks later with a virulent strain. Antibodies against the major viral glycoproteins (gII, gIII, gp 50) were titrated at the day of challenge. Excretion of the challenge(More)
Two real-time RT-PCR kits, developed by LSI (TaqVet CSF) and ADIAGENE (Adiavet CSF), obtained an agreement to be commercialised in France, subject to conditions, defined by the French Classical Swine Fever (CSF) National Reference Laboratory. The producers were asked to introduce an internal control to check the RNA extraction efficacy. The different(More)