sheep diseases
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Cairo university
Faculty Of Veterinary Medicine
Dept. Of Internal Medicine And Infectious Diseases
Course No. 452
Infectious diseases of sheep & goat
Parasitic Disease
Alopecia can be seen on the sheep's body.
Alopecia and scales can be seen on goat's head.
Psoroptic mange
A goat with generalised lesions.
Demodectic Mange
Nodules surrounding A goat's lip, nares and eyes.
Nodules have been exposed by clipping the hair, and exudate has been expressed from one Nodule
Sarcoptes mite
Sarcoptes mite
Psorptes mite
Demodex mite
Tick
This engorged tick is attached below the chin.
Adult Tick
Cutaneous myiasis
Numerous maggots are feeding on the skin surface.
biting louseNote the broadhead and a tan
body.
sucking louse Note the narrow
head and a blood-filled body.
Oestrus OvisLarva of Oestrus Ovis in the nasal cavity
Oestrus OvisLarvae and pupa of Oestrus Ovis
Fascioliasis Mature flukes in the bile ducts.
Fascioliasis
Chronic fibrous thickening of the bile ducts.
Fascioliasis Bile-stained ova in faeces, with the operculum.
A sheep with submandibular oedema (“bottle jaw”).
HaemonchosisSevere anemia in acute infection.
Adult Lung worm in lung tissue
Lung worm larva
Lung worm larva
Moniezia expansaStrobila in the lumen of the intestine.
Moniezia expansalamb intestine.
Moniezia expansaA tapeworm from an infected lamb.
Moniezia eggs
Nematodirus egg
P.G.E. egg
Hydatid cysts in a sheep liver.
(Coenurus cerebralis infection.)
Coenurus cerebralis Cyst
CoccidiosisEimeria infection in a goat.
CoccidiosisEimeria lesions in a sheep.
Un-sporulated Oocysts of Eimeria sp.
Sporulated Eimeria oocyst
Babesiosis. in sheep red cells. Giemsa stain.
A mixed infection by babesia and Theileriosis.
Theileriosis. Erythrocytic forms of (T. hirci) in a blood smear. Giemsa stain.
Viral Disease
Contagious Pastular Dermatitis
The lesion at the mouth commissure, around the nares and around the eye
C.P.D
Strawberry footrotNote The Lesion on The mouth
Note the lesion on and around the teats
C.P.D
Facial oedema with Mucopurulent to bloody nasal discharge.
Bluetongue
BluetongueCrusts round the eyes and nares.
Intense congestion and swelling of lips and gums and sloughing of the dental pad mucosa.
Blue tongue .
BluetongueLameness and tiptoe stance in the acute disease .
Bluetongue Lesions at the coronary band.
Foot-and-mouth disease.
Acute lameness.
Foot-and-mouth disease
Lip erosions and blanching of the dental pad.
Foot-and-mouth diseaseVesicle on the coronary band.
Foot-and-mouth diseaseTiger-striping of the myocardium.
Sheep pox Pox lesion around nostrils and eye
Sheep pox. Pulmonary lesions. Sheep pox . nodules in the lungs (pulmonary form)
Bacterial Disease
Anthrax bacilli in sheep blood
Black disease .A focal necrotic lesion in the liver.
Lamb dysenteryBlood-stained tail and hind-quarters.
Struck Localized enterotoxaemia in the small intestine.
Lamb dysentery Acute enteritis.
Pulpy kidneyNecrotic 'cotton-wool' kidney cortex.
Blackleg Note the blackened area of acute muscle
necrosis.
SalmonellosisEngorged liver with distension of the gall bladder.
Tick pyaemiaMultiple liver abscesses.
Listeriosis
ListeriosisFacial paralysis in a lamb
TetanusNote the characteristic tail position.
Tetanus Characteristic rigidity in a recumbent buck.
Caseous lymphadenitis note the lesion under the ear
Caseous lymphadenitis abscesses in a sheep lung.
Brucella melitensisNecrotic cotyledons in aborted material.
Brucella melitensis A stillborn fetus with necrotic placenta.
Brucellosis .Edema and swelling of scrotum
Dermatophilosis ”lumpy wool.”Wool fibers matted together by exudate
DermatophilosisThick crusts cover this goat's dorsum after
prolonged exposure to rain.
Dermatophilosis Crusty,scaly lesions involve this goat's head, ears &
neck.
Dermatophilosis
DermatophilosisThis smear from
the underside of a crust shows the
parallel arrangement of the organisms by Gram
stain.
FootrotThis lame sheep is forced to graze on its limbs
FootrotThe sole has been under run and perforated in several places.
FootrotThe claws are deformed by a severe, chronic infection.
Footrot Fly strike on the hoof of a sheep.
Fungal Disease
RingwormWool loss and erythema caused by dermatophytes.
RingwormGoat skin with alopecia and crusting.