Neurological Diseases Of Sheep Flashcards
List the differentials for neurological diseases seen in sheep from birth to 7 days of age.
Bacterial meningitis - collapsed and septicaemic Border disease Congenital swayback Drunk lamb syndrome / lamb nephrosis Tetanus
List the common neurological diseases seen in sheep from birth to 3 months of age.
Spinal abscesses - penicillin and dexamethasone for 5 days
Listeriosis
Louping ill
Louping ill
Tick borne flavivirus
Can occur at any age
Colostrum protective
Vaccine available
CS: head pressing, nystagmus, trembling and tremors, abnormal gait, lip twitching
Differentials for neurological disease in sheep from 3 months of age until adult
CCN
Listeriosis
GID
Louping ill
GID Cyst
Taenia multiceps
Coenuris cerebralis
Circling, contralateral blindness, skull softening - forebrain cyst
Head tilt - cerebellar cyst - poorer px
Cerebro-cortical necrosis
Due to vitamin b1 deficiency
Seen in 2-6mo sheep
Associated with a diet change or worming
CS: star gazing, blindness, opisthotonos, recumbency, tremors
Tx: supplement thiamine q12h for 3 days
House quietly
Vision should return in 5-7 days
Prevention: thiamine rich diet
Listeriosis
Seen in 18-24mo sheep - changing molar teeth
Fed on mouldy silage
Micro abscesses in the brainstem
CS: facial nerve paralysis (ear droop, ptosis, deviated muzzle), trigeminal nerve paralysis (salivation and food impacted in cheek), anorexia, depression, unilateral hemiparesis
Tx: benzylpenicllin IV Followed by procaine penicillin IM Dexamethasone IV The 5 days of procaine penicillin IM Remove mouldy silage
Common neurological diseases seen in adult sheep
Metabolic - seen during pregnancy
- pregnancy toxaemia - blind, dull
- hypocalcaemia - collapsed, bloated, facial paralysis
- Hypomagnaesaemia - staggers and hyperaesthesia
Cervical subluxation - ram fighting - paresis GID cysts Listeriosis Brain abscess Wobbler scrapie
