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Plate 1. Clinical case of CBPP
This animal is showing difficulty in breathing. It stands with its head and neck extended and legs placed widely apart. Often the elbows are turned out.
A decrease in healthy lung mass and inflammation of the membranes surrounding the lungs causes pain in the chest, resulting in pronounced abdominal breathing movements. Poor general condition.
(Photograph courtesy of DAHP, Botswana) |
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Plate 2. Early stages of CBPP abnormalities in the chest
The diaphragm has been removed to allow a better view.
The right lung (1) has a normal pink colour and has collapsed as the chest was opened. The left lung (2) has not collapsed; it is firm, discoloured and fleshy. It is coated with a yellow fibrin deposits, which are also present on the inside of the ribs. Often parts of the lungs adhere to the chest wall.
Also visible are the remains of the large amount of yellowish fluid (3), which was present in the chest. Here, it is coloured pink by blood from the carcass.
(Photograph courtesy of R. Windsor) |
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Plate 3. Swollen joints of a calf with acute CBPP
Swollen joints can occur with CBPP infection and are usually found in younger stock, that can be lame and in pain. If a post mortem were to be performed, the joint fluid might be watery, slightly cloudy or even have flecks of yellow-white material floating in it.
(Photograph courtesy of R. Windsor) |
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Plate 4. Early stage of CBPP, with fluid in the chest
The chest cavity has been opened to show the large volume of yellowish fluid due to CBPP infection. If the volume is great, it can be sufficient to interfere with breathing and be the cause of death.
(Photograph courtesy of DAHP, Botswana) |
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Plate 5. The lungs in early CBPP
The lung lobe at the bottom of the photograph is normal, and collapsed when the chest was opened. The affected lung at the top is firm and fleshy, liver-like, and did not collapse. Clotted fibrin is visible on its surface.
(Photograph courtesy of IZST, Italy) |
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Plate 6. Characteristic post mortem appearance
Part of diaphragm cut away to show heavy fibrin deposits (“omelette-like”) on lungs and yellowish pleural fluid in chest cavity. There are adhesions of the lungs to the chest wall.
(Photograph courtesy of the University of Pretoria, Republic of South Africa) |
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Plate 7. CBPP marbled lung
Lung from an animal that died of CBPP. The hardened lung has been cut open to reveal the marbled appearance of the fleshy and diseased areas. A network of pale bands separates areas of dark red lung. This is very typical of CBPP.
(Photograph courtesy of DAHP, Botswana) |
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Plate 8. Early CBPP: Marbled lung
Early stages of marbling.
Close-up view of a section of lung tissue of an animal that died from CBPP. The lung would feel very firm. Note the different colorations separated by white bands, known as interlobular septae. The overall mottled appearance is referred to as “marbling”.
(Photograph taken from CBPP CD-ROM, courtesy of University of Pretoria, Republic of South Africa) |
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Plate 9. Chronic CBPP with sequestra
The dead lung tissue has changed into a solid cheese-like material, which is encapsulated. Many recovered cattle have one or more of these sequestra in their lungs. Chronic cases of CBPP often have such lesions.
This is a typical lesion of CBPP to be looked for during meat inspection.
(Photograph courtesy of R. Windsor) |
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Plate 10. Early case of CBPP: kidney infarcts
Areas of dead tissue on the kidney surface (called 'infarcts') clearly stand out as white spots against the background of the red, normal kidney tissue.
(Photograph courtesy of IZST, Italy) |
