Cardiorespiratory Disease Flashcards

1
Q

bTB IBR BRD

A
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2
Q

Viral causes of respiratory disease in cattle

A

Infectious bovine rhinotracheitis (IBR)
Malignant catarrhal fever (MCF)
PI3
RSV
BVDV

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3
Q

Bacterial causes of respiratory disease in cattle

A

Mycoplasma bovis
Mannheimia haemolytica
Pasteurella multocida
Mycobacterium tuberculosis
Contageous bovine pleuropneumonia (CBPP)
Histophilius somni (more common in North America)
Truperella pyogenes

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4
Q

Parasitic causes of respiratory disease in cattle

A

Dictocaulus viviparus (lungworm)

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5
Q

Management causes of respiratory disease in cattle

A

High stocking density
Poor ventilation
Poor colostrum

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6
Q

Other causes of respiratory disease in cattle

A

Fog fever
Caudal vena cava thrombosis
Aspiration pneumonia

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7
Q

Cause of IBR in cattle

A

Bovine Herpes Virus 1

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8
Q

Epidemiology of IBR

A

Aerosol transmission - direct or shared air spaces
Incubation period of 10-20d
Animal is infected for life once exposed
Periods of stress can cause shedding and recrudescence - calving, illness, corticosteroid use etc.

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9
Q

Clinical signs of mild IBR in cattle

A

Conjunctivitis
Epiphora
Mild strain or immunity

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10
Q

Clinical signs of subacute IBR in cattle

A

Milk drop
Pyrexia (40 degrees)
Nasal discharge
Hyperpnoea
Abortion after respiratory signs
Genital lesions

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11
Q

Clinical signs of acute IBR in cattle

A

Marked pyrexia
Secondary infection
Purulent nasal discharge
Conjunctivitis

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12
Q

Diagnosis of IBR in cattle

A

History (new animals/groups introduced) and clinical signs
Nasal and conjunctival swabs - PCR
Paired blood samples - rising titres on ALISA
Bulk milk antibody - monitor herd exposure

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13
Q

Control and eradication of IBR in cattle

A

Do nothing
Vaccination to control clinical signs - routine, conventional or marker
Accreditation/eradication (+/- vaccine)
Biosecurity - double fencing, avoid introducing new stock, test and quarantine

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14
Q

Accreditation schemes for IBR free herds

A

Accredited free
Vaccinated monitored free
Eradication programme

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15
Q

Live vs Inactivated vaccines against IBR in cattle

A

Live - rapid protection (especially intranasal), more effective?
Inactivated - reduced shedding in latently infected animals?, use if there in asymptomatic infection

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16
Q

Primary pathogens that cause respiratory disease in cattle

A

RSV
PI3

17
Q

Aetiology and Epidemiology of malignant catarrhal fever (MCF)

A

OvHV-2 from asymptomatic sheep
Stress leads to increased shedding

Sporadic disease in cattle
Aerosol, direct contacts, contaminated feed, water or bedding
No transmission between cattle - only from sheep

18
Q

Clinical signs of MCF in cattle

A

Pyrexia
Enlarged LNs
Mucopurulent nasal and ocular discharge
Corneal opacity
Sloughing of oral and nasal mucosa

19
Q

Treatment of MFC in cattle

A

No licensed treatment of vaccination
Almost always fatal

20
Q

Epidemiology of bTB in cattle

A

Reservoirs of infection - badgers, deer, ferrets, infected cattle
Killed by sunlight
Routes of infection - ingestion or inhalation, urine, sputum, faeces, milk, vaginal and uterine discharge, exhaled air

21
Q

Clinical signs of bTB in cattle

A

Often don’t see clinical signs
Soft, productive cough
Weight loss, LN enlargement

22
Q

Testing of bTB in cattle

A

Skin tests (SICCT)
- avian and bovine tuberculin injections
- clear, inconclusive, or reactor
- ++ specificity, + sensitivity
Blood testing
- IFN gamma testing used in addition to skin testing
- ++ specificity and sensitivity
- antibody test occasionally used (++ specificity, + sensitivity)
PM inspection
- all cattle inspected PM
- more detailed in reactors
- approx. 60% reactors have no visible lesions at PM

23
Q

Prevention and control of bTB in cattle

A

BCG vaccination - skin test positive
DIVA test to allow vaccination and testing
BCG vaccination in badgers - reduces lesions but doesn’t cure, need to vaccinate enough individuals to have herd immunity
Biosecurity - movement testing, isolation, wildlife proofing, slurry storage, spreading and equipment

24
Q

Aetiology and Epidemiology of Contageous Bovine Pleuropneumonia (CBPP) in cattle

A

Caused by mycoplasma mycoides bacterium
Widespread in Africa and eradicated in UK

Aerosol transmission, poor survival in the environment
Recovered animals may be carriers leading to challenges from control programmes

25
Q

Clinical signs of CBPP in cattle

A

Pyrexia
Increased respiratory rate and effort
Weight loss
Polyarthritis in affected calves?

26
Q

Control of CBPP in cattle

A

Vaccination where movements cannot be restricted
Treatment in endemic areas
Notifiable in England

27
Q

Diagnosis of BRD

A

Pathogen detection
Lung pathology - cadaver material with lesions
Clinical signs - farmer monitoring
Epidemiology based

28
Q

Treatment of BRD

A

NSAIDs
Antibiotics - own choice, RUMA category, duration of action
Electrolytes (dehydrated)
TLC

29
Q

Aetiology and Pathogenesis of pericarditis in cattle

A

Ingestion of sharp, linear metallic FB - tyre wires associated with clamp feeding
FB penetrates reticular wall into the pericardial sac due to contractions
Increase purulent material in pericardium leads to cardiac temponade

30
Q

Clinical signs of peritonitis in cattle

A

Cardiac temponade
Reduced cardiac output - forwards failure
Progression to CHF (backward) - submandibular and brisket oedema
Milk drop
Non-specific illness that appeared to resolve before recurring
Inappetence
Pain - abducted elbows, positive withers pinch
Rubbing/friction sounds on auscultation
Pyrexia - not in chronic cases

31
Q
A