Sheep Respiratory Disease - Pathology Flashcards
What is shown?
FIBRINOUS PNEUMONIA
What is going on here?
Pasturella pneumonia/septicaemia in lambs
Affected parts o the lungs are usually in the cranioventral lung regios and feel consolidated/hard
What can be seen here? Why does it happen?
Pleurisy - it can occur for various reasons, as a result of a bout of Pasturella pneumonia which the lamb survives, or as a complication of navels ill or a bacteril infection picked u around birth. As a rule, the drier the beige deposits, the mosre longstanding are the lesions
What is happening here?
Pasturella (trehalosi) septicaemia
This is basically a fast acting septicaemia which typically affects lambs in autumn during bad weather or after movement (stress). The carcase has haemhorrhages all over, throat, LN are enlarged (blue arrow) as may be defects, reddening or a green/beige deposit on the linign of the oesophagus
What is this?
ENZOOTIC PNEUMONIA
What is going on here?
Enzootic (mycoplasma ovipneumoniae) pneumonia
This is a slowly progressive usually non fatal condition which causes a cough and usually reduced growth rates. It is an incidental finding or may be seen in lambs at slaugter. There are characteristicwhite foci with areas of purple heavy lung and lesions are always in the CrV lung lobe
What is this?
ABSCESSES
What are these?
Abscesses
What is going on here?
Chronic lung abscessation/endocarditis
This can be a source o conditrion loss and death in older sheep. It is caused by a focus of infection somehwere getting into the blood stream and settling out in th lungs or heart valve. If it occurs a high prevalences, needle hygiene and lamness control should be reviewedd.
What is this?
OVINE PULMONARY ADENOCARCINOMA (OPA)
What is this?
OPA - ovine pumonary adenocarcinoma
OPA is a lung tumour caused by a virus (Jaagstieke) it causes hard white areas, sometimes large consolidated resion, sometimes speckled, in ay prt of the lungs, usually in asult ewes. There is usually much which froth in airways
What does this show?
MAEDI
What is this?
CASEOUS LYMPHADENITIS
What is this?
MUELLERIOSIS
What is this?
Muellerius capillaris: Non-immune stage
What can be seen?
The lead shot lesion of ovine parasitic pneumonia
What is this?
DICTYOCAULOSIS
What is this?
HYDATIDOSIS
What is the cause of this?
Dosing gun injuries
It is essential to open up the throat of any sheep being examined, remove the tongue and have a look underneath, otherwise these injuries can be missed
