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Publication The Incidence and Virus Isolation of Avian Encephalomyelitis in Taiw...  

Update Date: [2013-11-11]

NO.: 28
 
Reportno.

AHRI report No.28

Topic

The Incidence and Virus Isolation of Avian Encephalomyelitis in Taiwan

Department

1.Taiwan Animal Health Research Institute
2.Department of\ etennarv Medicine, National Chung-Hsing Lniverstty

Author Y.S. LulFH.J. TsailFS.H. LeelY.L. LeelFD.F. LinlFHappyK. Shieh2
Summary

The outbreak of avian encephalomyelitis (‘NE) and isolation of its causative agent was first reported by the authors in 1968 in Taiwan. Fifty-five outbreaks confirmed as AEwere diagnosedbythe authors from 1968 to 199l.A.n outbreak in 1971 was found in the imported breeders from the United States during a quarantine period. The origin of Al was speculated to be introduced into Taiwan via the imported chickens. The average incidence rate of AE in Taiwan was 25.8% and the average case fatality rate was 43.2%. More cases were found in Spring and Autumn Most of the cases occurred in the chicks under 3 weeks old. No chicks over 6 weeks old had AL. The clinical signs of AL were characterized with nervous symptoms such as paresis of legs, tremors in the head and neck. Vinis could be isolated from brain using AL- antibody-free embryos and chicks. Histopathologically, perivascular cuffing found in brain and spinal cord and central chromatolysis found in neurons in the nuclei of the medulla oblongata and spinal cord were especially helpful for diagnosis.

Keyword

Avian EncephalomyeitisFVims Isolation1Fllistopathologicafly