IBR Flashcards

1
Q

Bovine Herpes Virus 1 causes 3 clinical manifestation

A

infectious bovine rhinotracheitis (IBR)
infectious pustular vulvovaginitis (IPV)
Infectious pustular balanoposthitis (IPB)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

What is the most common clinical manifestation of disease that occurs during primary infection with BoHV-1

A

IBR

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

How is BoHV-1 most commonly transmitted

A

Direct contact/Respiratory secretions

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

Outline stages of IBR disease

A

Primary infection- Sheds virus
Latent infection
Secondary infection that can be induced by stress

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

What stage of disease does animal show clinical sign

A

Primary stage

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

C/S of IBR

A

Respiratory signs
Dull
Reduced milk yield
Pyrexia
Conjuctivitis/Nasal ocular discharge
Rapid and loud breathing with cough
Abortion

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

Will latent infected animal show antibody titre

A

Yes

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

Dx of IBR

A

Ocular conjunctival swab
PCR
Increase in antibody titre

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

Tx of IBR

A

Vaccination
NSAIDS
AB for secondary infection

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

What are vaccines licensed to do in IBR

A
  1. Reduce severity of C/S
  2. Reduce shedding during primary infection
  3. Reduce the likelihood and duration of shedding from reactivation
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

What does vaccines NOT do in IBR

A

Do not prevent reactivation/latent infections

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

What vaccines do I choose (Live/Inactivated)

A

Live primarily chosen. Offer faster protection against clinical signs if given intranasally

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

What is the key difference in conventional vaccine and marker vaccine in terms of antibody type they will produce

A

Marker vaccine will not stimulate production of Glycoprotein E

Both vaccines stimulate GpB

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

Why using antibody titre to detect gpE and gpB could be challenging in a vaccinated cow

A

Both gp will be seen in vaccinated animal with conventional vaccine without an infection

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

Most common route of a IBR outbreak

A

New introduction to Naive herd

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

How to calculate herd prevalence

A

No. of infected herd/No of herds in country

17
Q

3 methods to test herd for IBR

A
  1. Historical lab results
  2. Bulk milk antibody test-Poor sensitivity
  3. Test a proportion of individual animald by Ab test/Snapshot(30 animals, >9months)- Most expensive and reliable
18
Q

Can animals entering AI stations where semen is used for trade within EU be vaccinated for IBR

A

No. They must not be infected or vaccinated against IBR