Final Exam

Question 1

These 2 viruses in cattle cause a transient rhino-tracheitis and broncho interstitial pneumonia with the formation of intracytoplasmic inclusion bodies in bronchial, bronchiolar, alveolar epithelial cells and alveolar macrophages.

Answer 1

1. Para-influenza virus (PI-3)

2. Bovine respiratory Synsytial virus (BRSV)

Question 2

Infectious Bovine rhino tracheitis (IBR) is caused by what virus?

Answer 2

BoHV-1

Question 3

You suspect a calf has necrotizing bronchiolitis. What 2 virus would be on your list of differentials?

Answer 3

BRSV and PI-3

Question 4

What are common sequels of chronic suppurative pneumonia?

Answer 4

Abcessation and bronchiectasis

Question 5

Bovine enzootic pneumonia causes what type of pneumonia?

Answer 5

Chronic suppurative bronchopneumonia

Question 6

Calves with this type of deficiency are highly susceptible to bronchopneumonia and why?

Answer 6

Calves with bovine leukocyte adhesion deficiency (BLAD). This prevents the migration of neutrophils from the capillaries.

Question 7

Pneumonic manheimiosis is also referred to as shipping fever in cattle causes what kind f disease?

Answer 7

acute respiraory disease for several days after shipment.

Question 8

What is the etiological agent that causes pneumonic manheimiosis?

Answer 8

Manheimia hemolytica

Question 9

You are doing a PM exam on a cow that died from what we suspect is shipping fever. What would be the Mdx for the typical appearance of the lungs?

Answer 9

Fibrinous necrotizing and hemorrhagic bronchopneumonia

Question 10

What is the characteristic appearance of the pulmonary parenchyma in Manheimia hemolyticum in cattle?

Answer 10

marbling appearance

Question 11

manheimia hemolyticum biotype A serotype 1 is responsible for severe pulmonary lesions. What type of necrosis is seen?

Answer 11

Coagulative necrosis of the pulmonary parenchyma

Question 12

What other bacterial pneumonia causes fibrinous pneumonia that may be hard to distinguish from Manheimia Hemolyticum?

Answer 12

Respiratory histophilosis which is caused by histophilus comnei

Question 13

What is the main differentiating factor between histophilus somnei and manhaeimia hemolyticum?

Answer 13

The marbling of the pulmonary parenchyma in manheimia hemolyticum.

Question 14

This bacteria is an important cause of chronic respiratory disease in North America?

Answer 14

Mycoplasma Bovis

Question 15

How would you describe the type of pneumonia seen in cattle suffering from mycoplasma bovis?

Answer 15

Chronic necrotizing bronchopneumonia

Question 16

In addition to Chronic necrotizing bronchopneumonia what other severe condition do we see in cattle?

Answer 16

Severe chronic fibrinous arthritis.

Question 17

What type of necrosis do we see in the lungs of a cow suffering from chronic necrotizing bronchopneumonia caused by M. bovis?

Answer 17

Caseous necrosis

Question 18

M. bovis is also referred to as Bovine tuberculosis. It produces granulomatous pneumonia and you also find lesions in what LN?

Answer 18

retropharyngeal LN, lungs, thoracic and mesenteric LN.

Question 19

On PM you take out the lungs and notice there are areas of consolidation in the cranial ventral region and increased consistency. What type of pneumonia pattern would you classify this as?

Answer 19

Suppurative Bronchopenumonia

Question 20

On PM you take out the lungs and notice yellow discoloration which is fibrin on the surface. What type of pneumonia pattern do you suspect and what are some potential etiologies?

Answer 20

Fibrinous bronchopneumonia

Manheimia Hemolytica + Histophilus somnei

Question 21

On PM you take out the lungs and notice no major color changes but the lungs are enlarged and are heavier. You also notice rib impressions. What type of pneumonia pattern do you suspect?

Answer 21

Interstitial Pneumonia

Question 22

On PM you take out the lungs and notice increased multifocal consolidation, hemorrhagic necrotizing lesions. What type of pneumonia do you suspect?

Answer 22

Embolic pneumonia

Question 23

On PM you take out the lungs and notice pale nodular lesions, tan in color, and increased consistency. What type of pneumonia do you suspect and what type of infection?

Answer 23

Granulomatous infection due to mycosis

Question 24

Why do we refer as lungs with pneumonia as hepatocitization?

Answer 24

Because it takes up a similar consistency

Question 25

What is the characteristic MDx in pneumonia caused by M. Bovis?

Answer 25

Chronic necrotizing bronchopneumonia

Question 26

What is the etiological agent causing Bovine Tuberculosis?

Answer 26

M. Bovis

Question 27

Where do you see lesions in a cow infected with bovine tuberculosis?

Answer 27

lesions involve regional LN, retropharyngeal LN, lungs, thoracic and mesenteric LN and in other areas in the body.

Question 28

Why is it difficult to completely eradicate bovine tuberculosis from NA?

Answer 28

Because it is hard to control in wildlife

Question 29

What is the cause of a verminous bronchitits/pneumonia?

Answer 29

Lung worms

Question 30

on PM you notice the lungs are consolidated only in the caudal end of the caudal lung lobe. What type of infection would you suspect?

Answer 30

Parasitic infection-lung worms

Question 31

What type of pneumonia would be caused by a parasitic infection?

Answer 31

Interstitial pneumonia

Question 32

What lung worm would you find in cattle, sheep, and equids?

Answer 32

1. Dictyocaulus viviparis
2. Dictycaulus filaria
3. Dictycaulus arnfieldi