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Lecture 23

WFSC 301 Lecture Notes - Lecture 23: Bighorn Sheep, Epizootic Hemorrhagic Disease, AutopsyPremium

1 pages44 viewsSpring 2017

Department
Wildlife & Fisheries Sci.
Course Code
WFSC 301
Professor
Walter Cook
Lecture
23

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Tuesday, March 28, 2017 at 4538 PM
Lecture 23: Epizootic Hemorrhagic disease
Common name: Ibaraki disease
Description:
endemic in the US
Mortality rates: higher in the summer and captivity
Etiologic Agent: EHDV
7 different serotypes
• dsRNA
transmitted by biting midges
History & Geogrpahic Distribution:
Seen in Japan, Caribbean, South America and parts of Europe
Hosts: White tailed deer, mule deer, pronghorn, bison, cattle, bighorn sheep
Signs & Gross lesions:
1st few weeks are minor
after a week symptoms become apparent:
- fever, swelling, trouble breathing
• Edema
Fluid around the heart
Hemorrhages on stomach
Diagnosis:
Blood and tissue samples taken at necropsy from the spleen, lymph nodes, or
lungs
ELISa, immunofluorescence or RT PCR
Prevention and control:
Reduce breeding ground for vectors
There is no vaccine for deer, only supportive care
Antibiotics like Draxxin can help reduce bacterial infections that may spike
Differences:
BTV is more prevalent in cattle
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