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1 -Caseous lymphadenitis.2 -Listeriosis.
3 -Brucella melitensis.4 -Brucella ovis.
5 -Actinobacillus and Histophilus spp.6 -Jhon’s disease.7 -Necrobacillosis.
Colitis in the lamb Transmission electron micrograph showing Campylobacter spp in apposition to the microvillus border
Large, yellow and encapsulated pyogranulomas in the lung ( occasional lesion in the lung)
Pus exudes from granulmatous facial lesions
Crusty, scaly lesion involve this goat’s head, ears and neck
Thick crust cover this goat’s dorsum after prolonged exposure to rain
Restriction of lesions to white areas suggests that infection induces photosensitivity
This smear from the underside of a crust shows the parallel arrangement of the organisms (Gram stain)
Wool fibers matted together by exudates (lumpy wool)
Alopecia and scaling on a goat’s ear A chronic ulcer on the fetlock
White pustules on the hairless areas
Acute mastitis in a goat, caused by Mycoplasma agalactiae ( contagious
agalactia)
Edema of the skin and discoloration of the udder parenchyma ( gangrenous
mastitis)
Note the purple discoloration of the udder and the limp teat ( gangrenous mastitis)
Histological section showing a large, red stained fibrin thrombus within an artery (gangrenous mastitis)
Histological section showing fibrin thrombi in blood vessels and cellular exudate filling acini (gangrenous mastitis)
Note the red, depressed healing tissue in several areas and the large masses of dark, necrotic tissue that have not yet sloughed, two weeks after the onset of gangrene (gangrenous mastitis)
The red fingers of tissue represent remnants of blood vessels encased in granulation tissue (gangrenous mastitis with sloughing)
The udder half on the left is firm and swollen and a draining fistula is evident (chronic staphylococcal mastitis)
The affected gland is distended with reddish liquid pus, while the other gland is atrophied (chronic staph mastitis)
This udder cross section shows inspissated pus and accumulation of Fibrinous tissue around the abscess (udder abscess)
Necrotic and diphtheritic colitis in a goat
Typical intercotyledonary thickening in a sheep placenta with yellowish surface deposits
Anaplasma marginalis in sheep red cells ( chromatin dot in the marginal of the cell)
Ring shaped bacillary or coccobacillary form attached to the surface of the red cells and some may be found in the plasma
Pink appearance of renal medulla due to haemosiderosis