Respiratory diseases of adult sheep Flashcards
What pathogen causes chronic suppurative pneumonia in sheep?
Arcanobacterium pyogenes
What may chronic suppurative pneumonia be secondary to?
Lung abscesses
Inhalational pneumonia
Caseous lymphadenitis
Mannheimia haemolytica
What type of virus causes Jaagsiekte or ovine pulmonary adenomatosis?
Retrovirus
What type of tumour does ovine pulmonary adenomatosis or Jaagsiekte cause?
Pulmonary carcinoma
Progressive and fatal
How is Jaagsiekte/OPA spread? How long is the incubation?
Lung fluid, aerosol, milk, colostrum
Incubation 2-4 years
How can Jaagsiekte/OPA be diagnosed?
Post-mortem - gold standard
Ultrasound
Wheelbarrow test
What is the treatment for Jaagsiekte/OPA? Is there a vaccine?
No treatment - euthanise
No vaccine as poor immune response
What is laryngeal chondritis? What is the main clinical sign?
Abscessation of arytenoid cartilages
Loud inspiratory dyspnoea
What breeds are predisposed to laryngeal chondritis?
Beltex and Texel
Rams > ewes, prognosis poor
What is the treatment for laryngeal chondritis?
Corticosteroids
Long acting ABs
Tracheotomy for emergency
What virus causes Maedi-Visna?
Lentivirus
related to CAE in goats
How is Maedi-Visna spread and when do clinical signs usually present?
Lung discharge/respiratory route or from milk/colostrum
Typically present 4-5 years old (2 yrs+)
Maedi-visna causes chronic inflammatory lesions and secondary infections with which pathogen?
Mannheimia haemolytica
How is Maedi-Visna diagnosed?
Post-mortem exam
Serology
How is Maedi-Visna prevented?
Buy in accredited sheep
Test and cull
(No vaccine)
