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Flashcards in Bovine Resp Dz Deck (33):
1

Immunosuppressive dose of Dex in cattle

0.2mg/kg

2

Allergic rhinitis is what type of hypersensitivity? Which cells are causing the tissue damage?

Type 1

repeated tissue damage by mast cells

3

Disease associated with these clinical signs:
--sudden onset of dyspnea
--profuse bilateral nasal discharge (mucopurulent)
--intense pruritis, sneezing
--granulomas with intact mucosa

Allergic rhinitis

4

Concerning sinusitus, name the two most common causes and which sinuses are affected

1) dehorning--frontal sinus

2) tooth root abscess--maxillary sinus

5

Most common agent associated with necrotic laryngitis?

Fusobacterium necrophorum

6

Inciting cause for most cases of necrotic laryngitis

laryngeal contact ulcers from respiratory viruses

**the bacteria can't penetrate intact mucous membranes**

7

This disease is characterized by:
--sudden onset of moist, painful cough
--depression, anorexia, and fever
--a palpably swollen larynx

Necrotic laryngitis

8

What type of pneumonia is commonly associated with shipping fever complex

cranioventral bronchopneumonia

9

Two major differences in the clinical appearance of animals with a bacterial vs. viral infection

Viral:
higher fever than bacterial
viral infected will be more alert (bacterial= more depressed)

10

Where does a virus remain latent if it's:
1) alpha herpes
2) gamma herpes

1) CNS tissue (BHV-1)

2) lymphoid tissue (OHV-1/AHV-1)

11

Infectious bovine rhinotracheitis (IBR) is caused by?

BHV-1 (1.1, 1.2a & 1.2b)

12

These clinical signs are indicative of what disease:
--high fever
--clear nasal discharge that progresses to mucopurlent as disease progresses
--increased BV sounds (but no other abnormal noises)
--conjunctivitis with ocular discharge

IBR (red nose)

13

T/F: Pulmonic pasteurellosis may be a sequel to IBR and the two diseases may occur simultaneously

TRUE

14

Two biotypes of BVDV? Which is more common?

Non-cytopathic (more common)

Cytopathic

15

Most herds with ____ BVDV will have ________ infections

endemic; subclinical infections

16

How does BVDV cause respiratory tract infections?

it's immunosuppressive (allows co-infection with other pathogens)

17

Diagnostic method of choice for BVDV?

How would you NOT diagnose persistently infected animals?

Virus isolation

Can't diagnose PI animals with virus isolation using lung biopsy

18

This virus causes mild to unapparent disease in younger cattle & is considered to be endemic in most cattle populations

PI-3 (parainfluenza)

19

Which diagnostic method is not helpful in diagnosing infections with PI-3? Why?

single serum specimens

Ab prevalence is very high--hard to find cattle without serological evidence of infection

20

Pasteurellosis in cattle is most commonly associated with infection by:

Mannheimia haemolytica (Biotype A, serotype 1)

(sometimes P. multocida)

21

3 important virulence factors associated with M. haemolytica

leukotoxin
endotoxin
capsular polysaccharides

22

Pasteurellosis (in necropsy) causes ______ of the lungs

hepatization (looks like liver)

23

This bacteria can cause a myriad of clinical signs due to the numerous systems it can affect (complex)

H. somni

24

A non-febrile and non-infectious respiratory disease in cattle linked to grazing of lush pastures

Acute Bovine pulmonary emphysema and edema (ABPEE)

25

Describe the pathophysiology of APBEE

cattle change from dry grazing to lush pastures that contain high concentrations of L-tryptophan

L-tryptophan is formed into 3-methylindole (3MI) in the rumen-->goes to blood stream-->lungs

Clara cells of the lungs convert 3MI to 3-methylindolamine-->leads to overgrowth of type II pneumocytes, edema, and emphysema

26

Two drugs that can be used to prevent ABPEE? How do they work?

Monensin & Lasalocid

help decrease 3MI production in the rumen

27

Infection with BRSV is associated with what type of pneumonia

atypical/acute interstitial pneumonia

28

Most common cause of TB in cattle?

Mycobacterium bovis

29

Which disease causes:
--progressive weight loss
--suppressed, moist cough that isn't paroxysmal
--retropharyngeal ln enlargement
--potential for GI signs

TB

30

Primary test for diagnosing cattle with TB?

Caudal fold tuberculin test

31

Which 2 bacteria are commonly associated with caval syndrome

Fusobacterium necrophorum (most common)

Trueperella pyogenes

32

The most common pathophysiology off caval disease?

Liver abscesses secondary to rumenitis (due to high grain diet)

33

2 common causes of pleural disease in cattle?

Lymphosarcoma
Hardware disease