Save
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.
focusNode
Didn't know it?
click below
 
Knew it?
click below
Don't know
Remaining cards (0)
Know
0:00
share
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

Paramyxoviridae

Newcastle Disease

QuestionAnswer
There is only 1 serotype of this virus, but there are various strains. How are they differentiated and what are they? Vary depending on the cleavability and activation of their hemagglutinin-neuraminidase and fusion glycoproteins. Lentogenic. Mesogenic. Velogenic (Viscerotropic & Neurotropic)
How are the proteins in virulent strains cleaved and activated? Cellular proteases present in the tissues
Who plays host to this virus? Gallinaceous birds [domestic chickens, turkeys, guinea fowl, peacocks]. pigeons.
What two types of birds are highly RESISTANT to this disease? Canaries and Finches
Transmission? Aerosols and ingestion of contaminated food and water.
How long is the virus shed? Shed during incubation period, clinical stage, and limited periods during convalescence. Birds shed for up to 4 weeks after recovery. PERSISTENT CARRIER STATE
Location of replication? Mucosal epithelium of the URT and GIT
Discuss Viremias. Primary viremia spreads virus to the spleen and bone marrow->Secondary viremia leads to the virus to infect other organs like the lungs and CNS
Mucosal immunity is provided by ? whereas ? in the circulatory system blocks viremia. IgA. IgG
How soon can neutralizing Ab be detected [hemagglutination inhibition antibodies] and how long do they persist? within 4-6 days of infection. persists for at least 2 years
Clinical signs of Vicerotropic velogenic ND: peracute and LETHAL. Hemorrhagic and ulcer-like lesions in the GIT. Mortality approached 100% in ALL ages
Clinical signs of Neurotropic velogenic ND: Acute and LETHAL. Lesions in respiratory tract and CNS. *Hemorrhages are ABSENT* Mortality approaches 100%
Clinical signs of Mesogenic pathotypes: Acute respiratory and sometimes lethal nervous infection of young chickens. Mortality approaches 25%
Clinical signs of Lentogenic pathotypes: Mild to inapparents respiratory infection of chickens
Control? REPORTABLE. Quarantine and depopulation
Vaccination? Naturally occurring lentogenic strains [B1 or La Sota]. MATERAL Ab PROTECT BABY CHICKS FOR 3-4 WEEKS AFTER HATCHING.
Zoonotic: conjunctivitis
Created by: lkollmeier
 

 



Voices

Use these flashcards to help memorize information. Look at the large card and try to recall what is on the other side. Then click the card to flip it. If you knew the answer, click the green Know box. Otherwise, click the red Don't know box.

When you've placed seven or more cards in the Don't know box, click "retry" to try those cards again.

If you've accidentally put the card in the wrong box, just click on the card to take it out of the box.

You can also use your keyboard to move the cards as follows:

If you are logged in to your account, this website will remember which cards you know and don't know so that they are in the same box the next time you log in.

When you need a break, try one of the other activities listed below the flashcards like Matching, Snowman, or Hungry Bug. Although it may feel like you're playing a game, your brain is still making more connections with the information to help you out.

To see how well you know the information, try the Quiz or Test activity.

Pass complete!

"Know" box contains:
Time elapsed:
Retries:
restart all cards