Recent outbreaks of Aujesszky's disease in pigs with particular reference to laboratory diagnosis of clinical cases
1981
Boonmee Sunyasootcharee | Sala Kongsmak | Phikhro Arjsongkoon
Six outbreaks of Aujeszky's disease in pigs have been confirmed by the Department of Pathology, Faculty of Veterinary Science, Chulalongkorn University since December, 1977. The clinically ill piglets were submitted and diagnosed by several laboratory methods. F.A. tests applied on brain impression smears and cryostat tonsil sections were rapid and gave an accurate results. Taking more time, histopathology of brains, tonsils and other organs of the infected pigs and the rabbit inoculation with the isolated virus were found reliable to support the F.A. tests. In this study, 21 out of 22 piglets from the 6 outbreaks of Aujeszky's Disease had non-suppurative encephalitis associated with Cowdry tape A intranuclear inclusion bodies in nerve and glial cells. Focal necrosis on livers, lungs, spleens, lymph nodes and tonsils were common. Rabbits developed intense pruritus at the site of injection at 2-4 days after inoculation of the virus. Clinically, the affected pigs, in all 6 outbreaks, exhibited nervous and respiratory signs and the pregnant swine had a high rate of abortions during the outbreaks.
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