3.1.5: Lung pathology Flashcards
What condition is represented here?
Fibrinous pneumonia
It is cranioventral and may be uni/bilateral
Fibrinous pneumonia
Pasteurella pnuemonia/septicaemia in a lamb
This a fibrinous pneumonia.
* Affected parts: usually the cranioventral lung regions. They feel consolidated/hard and not spongy.
Pleurisy
A form of fibrinous pneumonia.
General rule
Drier beige deposits = more longstanding lesions
This is pleurisy. Why might this occur?
A variety of reasons
* Bout of Pasteurella pneumonia which the lamb survives
* As a complication of navel ill
* Bacterial infection picked up around birth
Pasteurella trehalosi septicaemia
* A fast acting septicaemia
* Carcass features: haemorrhage all over, enlarged throat lymph nodes (blue arrow), defects/reddening/green-beige deposit on lining of oesophagus
What form of pneumonia is represented here?
Enzootic pneumonia
Enzootic pneumonia
Enzootic pneumonia caused by Mycoplasma ovipneumoniae
* Slowly progressive, usually non-fatal
* Clinical signs: cough and reduced growth rates
* May be incidental finding at slaughter
* Carcass: small white foci with areas of purple heavy lung
* Lesions are i the cranioventral lung lobes
What condition is represented here?
Lung abscess
Abscess
How would you differentiate between an abscess, a CLA abscess, and an OPA mass?
- Abscess = smooth and firm
- CLA abscess = irregular and firmer mass with laminated pus
- OPA mass = solid and does not have a capsule
Many people diagnose by incising but it can be done by touch too.
OPA mass
Abscess
CLA abscess
Chronic lung abscessation/endocarditis
* Source of condition loss/death in older sheep
* Cause: a focus of infection somewhee getting into bloodstream and settling in lung or heart valves
* Control: if this occurs at high prevalence, investigate lameness and needle hygiene
Ovine Pulmonary Adenocarcinoma (OPA)
OPA
* Virus that causes lung tumours. Typically seen in adult ewes.
* Causes hard white areas, sometimes large consolidated regions, sometimes speckled
* Affects any part of the lungs
* There is usually much white froth in the airways
Which condition is represented here?
Maedi Visna
Maedi Visna
Which condition is represented here?
Caseous lymphadenitis
Caseous lymphadenitis
Which condition is represented here?
Muelleriosis
Muelleriosis
Muellerius capillaris non-immune stage
Ovine parasitic pneumonia
What condition is represented here?
Dictyocaulosis
Dictyocaulosis
What condition is represented here?
Hydatidosis
Hydatidosis
