FAC14: Respiratory Disease of Adult Cattle Flashcards
Why are adults less likely to get a respiratory disease than young stock?
They are more likely to possess adaptive immunity and less susceptible to stressors
What a signs that there is disease in the larynx and pharynx?
stertor, hypersalivation, and tachypnoea
What is the DDx of disease in nasal passages?
- Trauma
- Foreign bodies
- Infection (A. lignierisi, A. bovis, T. pyogenes)
- Neoplasia
What is the DDx of disease in the larynx and pharynx?
- Trauma
- Drenching injury
- Foreign body
- Laryngeal chondritis (F. necrophorum)
What is the most common cause of infectious bovine rhinotracheitis outbreaks in adults?
- Naive herds following introduction
- Endemically infected herds following stress
Describe the progression of an infectious bovine rhinotracheitis outbreak in adults.
- Sporadic milk drops
- Individuals with tracheitis/broncho-pneumonia
- Widespread herd involvement
- Fatalities
- Reduced milk production
How is infectious bovine rhinotracheitis spread?
nose-to-nose contact
What are the causative agents of acute bacterial pneumonia?
Mannheimia haemolytica and/or pasteurella multocida
How does chronic suppurative pulmonary disease develop?
- Develops following incomplete recovery from pneumonia
- Often after calving or stress
What is the causative agent of chronic suppurative pulmonary disease?
T. pyogenes
What is the worm that causes lungworm/husk?
Dictyocaulus viviparous
How do you test for lungworm?
Baermann (shit samosa)
What are the main clinical signs of fog fever?
- 1-2 weeks after moving to lush aftermath
- Overgorging on alfalfa, rape, kale, and turnip tops
- NO COUGHING
- NORMAL RECTAL TEMP
What causes Farmer’s Lung?
Housed cattle eating mouldy hat
Will you hear a murmur with endocarditis in cattle?
No murmur in >70% of cases
What is the best way to prevent an uppre respiratory tract in the nasal passages and sinuses of adult cattle?
Avoid de-horning adult cattle, if unavoidable, then feed from floor to reduce risk of forages entering sinuses and avoid performing during the fly season
How do you tell the difference between IBR and atopic rhinitis?
Atopic rhinitis usually affects individuals or a small number of animals, is highly seasonal (most common at turnout) and signs are generally mild
What actually causes the cough when there are lungworms?
The cough is the result of the immune response to the lungworm larvae as they migrate through the lungs before they are killed
What is the mould that causes farmer’s lung?
Mouldy hay contains spores derived from Micropolyspora faeni and Thermocatinomyces vulgaris
