Intro to respiratory infections of cows and sheep

Question 1

Name some viruses that make up bovine respiratory disease complex

Answer 1

BRSV
PI3
IBR
BVD

Question 2

What respiratory infection does Bovine Respiratory Syncytial virus cause?

Answer 2

Interstitial pneumonia and emphysema

Question 3

What respiratory infection does Bovine Parainfluenza cause?

Answer 3

Bronchitis and bronchiolitis

Question 4

Infectious bovine rhinotracheitis (BHV-1) is an URT infection commonly seen in what age cattle?

Answer 4

6-18 months

Question 5

What cells does BVD destroy leading to respiratory disease?

Answer 5

Alveolar macrophages

And depletes lymphoid tissue

Question 6

What cells does Jaagsiekte or OPA target?

Answer 6

Type II pneumocytes

Question 7

What virus causes Maedi-Visna and what cells does Maedi infect?

Answer 7

Monocytes

clinical signs take years to develop

Question 8

What 3 bacteria cause Pasteurellosis in cattle?

Answer 8

Mannheimia haemolytica
Pasteurella multocida
Histophilus somni

Question 9

What causes ‘Shipping Fever’?

Answer 9

Mannheimia haemolytica

Question 10

Is Histophilus somni commensal or pathogenic?

Answer 10

Commensal in genital tract

Pathogenic in respiratory tract

Question 11

Histophilus somni causes release of what chemical?

Answer 11

Histamine

Also causes thrombi

Question 12

What 2 bacteria cause Pasteurellosis in sheep?

Answer 12

Mannheimia haemolytia

Bibersteinia trehalosi

Question 13

What 3 factors predispose a sheep to Pasteurellosis?

Answer 13

Close contact - age mixing
Poor ventilation
Poor immunity