Respiratory Disease of Sheep Flashcards
What should be looked for in a distance exam of a flock of sheep?
Demeanour Size variation Nasal/ocular discharge Dyspnoea Coughing
What is the normal RR of a sheep?
<20bpm but quite often is a little faster
How are most sheep resp diseases confirmed?
PME
How can resp disease be diagnosed in valuable sheep?
BAL
Radiography, US
Which disease can cause sudden death in sheep?
Peracute pneumonia
Septicaemia
Which diseases can cause ill health, cough, discharges and pyrexia in sheep?
Acute bacterial/viral pneumonia
Aspiration pneumonia
Parasitic pneumonia
Which disease can cause chronic ill health and occ cough in lambs?
Chronic pneumonia
Lung damage
What are signs of acute respiratory disease in sheep?
Noisy difficult breathing
URT
Laryngeal chondritis
What is the most common resp problem in sheep?
Pneumonia
What are the risk factors of pneumonia in sheep?
Housing Young ages Stress Climate Mixing of ages/sources
What are the main agents involved in ovine pneumonia?
M. haemolytica
Mycoplasmas
PI3
Adenoviruses
What is another name for enzootic pneumonia in sheep and what bacteria causes it?
Pneumonia pasteurellosis
M. haemolytica (used to be pasteurella!)
What age sheep does septicaemia affect?
Young lambs
What are the clinical signs of enzootic pneumonia in sheep?
Sudden death Pyrexia Depressed, inappetance Dyspnoea, coughing, nasal discharge Poor thrift
Why isn’t isolation of PI3/M. haemolytica from the nasal cavity of a sheep diagnostic?
Are found commensally
How is enzootic pneumonia definitely diagnosed?
PME - histopathology of large number of M. from the lungs
How is enzootic pneumonia in sheep treated?
Oxytetracycline
When are ewes and lambs vaccination for pneumonia?
E - sensitiser and booster 4-6 weeks pre-lamb
L - 3-5 weeks, 6-9 weeks
What are the clinical signs of atypical pneumonia in sheep?
Reduced growth rates
Subclinical
Dull, poor BCS
What are the signs of atypical pneumonia on PME in sheep?
Clearly demarcated red-brown-grey areas of lung
Apical and cardiac lobes
M. ovipneumoniae
How is atypical pneumonia prevented?
Housing, good ventilation
Reduce stocking density
Quarantine introduced animals
Which is the only important lungworm in sheep?
D. filaria
When is pasture most contaminated by D. filaria?
Autumn - winter
What are the clinical signs of parasitic pneumonia in sheep?
Coughing, increased RR, nasal discharge
Severe weight loss
