| porcine teschovirus polioencephalomyelitis in western canada. | beginning in 2002, a small number of pig farms in western canada began reporting 4-7-week-old pigs with bilateral hind-end paresis or paralysis. low numbers of pigs were affected, some died, most had to be euthanized, and those that survived had reduced weight gains and neurological deficits. necropsies revealed no gross lesions, but microscopic lesions consisted of a nonsuppurative polioencephalomyelitis, most severe in the brain stem and spinal cord. the lesions were most consistent with a vir ... | 2011 | 21398466 |
| quantitative polymerase chain reaction for porcine circovirus-2 in swine feces in a porcine circovirus disease-affected commercial herd and a nonaffected commercial herd. | this study examined if pigs in a porcine circovirus disease (pcvd)-affected herd (n = 100) had shed more porcine circovirus-2 (pcv-2) in their feces than pigs in a pcvd-nonaffected herd (n = 101), and if differences in shedding among production stages within and between the herds existed. the pcv-2 shedding was quantified by real-time polymerase chain reaction. the highest median pcv-2 shedding was found in the nursery of the pcvd-affected herd and in the grower of the pcvd-nonaffected herd. the ... | 2008 | 19252710 |
| isolation of circovirus from lesions of pigs with postweaning multisystemic wasting syndrome. | postweaning multisystemic wasting syndrome (pmws), an apparently new disease, has been recognized in swine herds in western canada. young pigs with this disease have progressive weight loss, tachypnea, dyspnea, and jaundice, accompanied by interstitial pneumonia, lymphadenopathy, hepatitis, and nephritis. we examined more than 400 pigs from more than 70 herds in alberta, saskatchewan, and manitoba with cases of pmws. a small virus was isolated from a range of tissues from 8 of 8 affected pigs ex ... | 1998 | 9442952 |