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Respiratory > Bovine Resp Dz > Flashcards

Bovine Resp Dz Flashcards

1
Q

Immunosuppressive dose of Dex in cattle

A

0.2mg/kg

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2
Q

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

A

Type 1

repeated tissue damage by mast cells

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3
Q

Disease associated with these clinical signs:

  • -sudden onset of dyspnea
  • -profuse bilateral nasal discharge (mucopurulent)
  • -intense pruritis, sneezing
  • -granulomas with intact mucosa
A

Allergic rhinitis

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4
Q

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

A

1) dehorning–frontal sinus

2) tooth root abscess–maxillary sinus

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5
Q

Most common agent associated with necrotic laryngitis?

A

Fusobacterium necrophorum

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6
Q

Inciting cause for most cases of necrotic laryngitis

A

laryngeal contact ulcers from respiratory viruses

the bacteria can’t penetrate intact mucous membranes

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7
Q

This disease is characterized by:

  • -sudden onset of moist, painful cough
  • -depression, anorexia, and fever
  • -a palpably swollen larynx
A

Necrotic laryngitis

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8
Q

What type of pneumonia is commonly associated with shipping fever complex

A

cranioventral bronchopneumonia

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9
Q

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

A

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

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10
Q

Where does a virus remain latent if it’s:

1) alpha herpes
2) gamma herpes

A

1) CNS tissue (BHV-1)

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

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11
Q

Infectious bovine rhinotracheitis (IBR) is caused by?

A

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

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12
Q

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
A

IBR (red nose)

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13
Q

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

A

TRUE

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14
Q

Two biotypes of BVDV? Which is more common?

A

Non-cytopathic (more common)

Cytopathic

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15
Q

Most herds with ____ BVDV will have ________ infections

A

endemic; subclinical infections

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16
Q

How does BVDV cause respiratory tract infections?

A

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

17
Q

Diagnostic method of choice for BVDV?

How would you NOT diagnose persistently infected animals?

A

Virus isolation

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

18
Q

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

A

PI-3 (parainfluenza)

19
Q

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

A

single serum specimens

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

20
Q

Pasteurellosis in cattle is most commonly associated with infection by:

A

Mannheimia haemolytica (Biotype A, serotype 1)

sometimes P. multocida

21
Q

3 important virulence factors associated with M. haemolytica

A

leukotoxin
endotoxin
capsular polysaccharides

22
Q

Pasteurellosis (in necropsy) causes ______ of the lungs

A

hepatization (looks like liver)

23
Q

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

A

H. somni

24
Q

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

A

Acute Bovine pulmonary emphysema and edema (ABPEE)

25
Q

Describe the pathophysiology of APBEE

A

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
Q

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

A

Monensin & Lasalocid

help decrease 3MI production in the rumen

27
Q

Infection with BRSV is associated with what type of pneumonia

A

atypical/acute interstitial pneumonia

28
Q

Most common cause of TB in cattle?

A

Mycobacterium bovis

29
Q

Which disease causes:

  • -progressive weight loss
  • -suppressed, moist cough that isn’t paroxysmal
  • -retropharyngeal ln enlargement
  • -potential for GI signs
A

TB

30
Q

Primary test for diagnosing cattle with TB?

A

Caudal fold tuberculin test

31
Q

Which 2 bacteria are commonly associated with caval syndrome

A

Fusobacterium necrophorum (most common)

Trueperella pyogenes

32
Q

The most common pathophysiology off caval disease?

A

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

33
Q

2 common causes of pleural disease in cattle?

A

Lymphosarcoma

Hardware disease

Respiratory (7 decks)

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