EASTERN EQUINE ENCEPHALITIS IN A FLOCK OF EMUS (DROMAIUS-NOVAEHOLLANDIAE)

被引:41
作者
TULLY, TN
SHANE, SM
POSTON, RP
ENGLAND, JJ
VICE, CC
CHO, DY
PANIGRAHY, B
机构
[1] LOUISIANA STATE UNIV,SCH VET MED,DEPT EPIDEMIOL & COMMUNITY HLTH,BATON ROUGE,LA 70803
[2] LOUISIANA STATE UNIV,SCH VET MED,LOUISIANA VET MED DIAGNOST LAB,BATON ROUGE,LA 70803
[3] LOUISIANA STATE UNIV,SCH VET MED,DEPT VET PATHOL,BATON ROUGE,LA 70803
[4] USDA,APHIS,NATL VET SERV LABS,VET SERV,AVIAN SECT,AMES,IA 50010
关键词
D O I
10.2307/1591790
中图分类号
S85 [动物医学(兽医学)];
学科分类号
0906 ;
摘要
Eastern equine encephalitis (EEE) was diagnosed in a flock of emus in south-eastern Louisiana. The outbreak involved juvenile and adult breeders ranging in age from 20 to 36 months, with an attack rate of 76% and a case fatality rate of 87%. The diagnosis was confirmed by isolation and characterization of the viral agent, and by detection of EEE antibody in two recovered emus. High mortality was preceded by marked depression, hemorrhagic diarrhea, and emesis of blood-stained ingesta. On postmortem examination, hemorrhagic enteritis and multiple petechia of viscera were observed. Microscopic changes included severe necrosis of hepatocytes, intestinal mucosa, and necrotizing vasculitis of the spleen and lamina propria of the intestine. No nervous system lesions were observed. This outbreak occurred concurrently with EEE in horses and was attributed to unseasonably heavy rainfall with an abundance of arthropod vectors and proximity to free-living reservoir host species.
引用
收藏
页码:808 / 812
页数:5
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