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.