OPPv

Question 1

(Ovine Progressive Pneumonia Virus)

1. similar to what virus?
2. most common Cx?
3. what does + sero mean?

Answer 1

1. CAEv
2. poor milk production due to udder involvement

(can be asymptomatic though)

alsocan get death from lung involvement

3. infection, doesn’t mean Cx are result

Question 2

(OPPv)

1. transmission?

Answer 2

1. horizontal (most common), vertical, and fomites

Question 3

1. ewes get what?
2. see on histo?

Answer 3

1. hardbag (BOTH sides of udders firm and not hot)

produce little milk

2. lymphocytes and monocytes, ^ smooth musc and fibrous CT

Question 4

(OPPv)

1. what are the 4 forms?

Answer 4

1. wt loss, mastitis, pneumonia (less common), arthritis

(so CAEv has kid neurlogic form but no wt loss - otherwise the same)

Question 5

(pneumonia form)

1. lungs weight 2-5x more (fibrous CT) - rib impressions

Question 6

(arthritis form)

just like goats

Question 7

(Dx)

1. hx and cx suggestive
2. gold standard?
3. usually use what?
4. what else works that is cracy?

Answer 7

2. immunoprecipitation
3. serology
4. Maedni Visna Elitest (ELISA) 99% sens/spec

Question 8

(Control)

why different that for CAEv

1-4. what four options?

Answer 8

not relient on intact CL - HPA axis used instead

1. test and cull, repeat, repeat
2. test and seprate (manage two flocks)
3. depopulate and restock w/ virus free sheep
4. genetics: 1:1 diplotype resistant (not completely though)