Busy. Please wait.
or

show password
Forgot Password?

Don't have an account?  Sign up 
or

Username is available taken
show password

why


Make sure to remember your password. If you forget it there is no way for StudyStack to send you a reset link. You would need to create a new account.
We do not share your email address with others. It is only used to allow you to reset your password. For details read our Privacy Policy and Terms of Service.


Already a StudyStack user? Log In

Reset Password
Enter the associated with your account, and we'll email you a link to reset your password.
Don't know
Know
remaining cards
Save
0:01
To flip the current card, click it or press the Spacebar key.  To move the current card to one of the three colored boxes, click on the box.  You may also press the UP ARROW key to move the card to the "Know" box, the DOWN ARROW key to move the card to the "Don't know" box, or the RIGHT ARROW key to move the card to the Remaining box.  You may also click on the card displayed in any of the three boxes to bring that card back to the center.

Pass complete!

"Know" box contains:
Time elapsed:
Retries:
restart all cards
Embed Code - If you would like this activity on your web page, copy the script below and paste it into your web page.

  Normal Size     Small Size show me how

Retroviridae

Maedi/Visna Disease

QuestionAnswer
Who is this a disease of? Adult sheep and sometimes goats
What is visna? Secondary encephalitic form of maedi
What are 4 ways this virus can be transmitted? Aerosolization. Ingestion of feces or urine. Colostrum and milk. Biting arthropods and surgical equipment.
What is the main pathogenetic caracteristic observed in this disease? Lifelong mononuclear cell-associated viremia
When do most sheep seroconvert? What is the precentage of clinical disease? 2-3 weeks AFTER infection. 5%
Why is this disease seen in sheep 2 years or older? There is a LONG incubation period ranging from months to 9 years!
What are 2 other synonyms of Maedi? Iis this disease fatal? Shortness of breath. Ovine Progressive Pneumonia (OPP). YES, within 3-8 months..especially with secondary bacT infections
What does visna mean? What is interesting about this? Wasting. Sheep maintain a good appetite if they are tended to. Those that are left to fend for themselves die of starvation.
What two other clinical signs are seen with this disease? Arthritis and Mastitis (noninflammatory fibrotic, reduction in milk production)
What about immunity? Viruses persist even though there are antibodies for it!
What can be done to control and outbreak in an uninfected flock? Pretesting and quarantine animals coming in. Retest animal every 6 months
Created by: lkollmeier