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Sheep (LHW) > Neurological diseases > Flashcards

Neurological diseases Flashcards

1
Q

What age of lambs are affected by CCN?

A

2-6 months

Growing lambs

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2
Q

What causes CCN?

A

Vitamin B1/thiamine deficiency

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3
Q

An animal with CCN may present dull, disorientated, blind with tremors, convulsions and opisthotonus. What in the history may have caused the onset of CCN?

A

Diet change or worming

Alters thiaminase production in rumen

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4
Q

What is the treatment for CCN? Does it resolve?

A

Vitamin B1 - slow IV or IM over 3 days

Vision returns within 1 week

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5
Q

How can CCN be prevented?

A

Avoid sudden diet changes (prevent altering thiaminase production in rumen)

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6
Q

What causes Gid?

A

Coenuris cerebralis

Intermediate/larval phase of Taenia multiceps

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7
Q

What is the primary host for Gid (Coenuris cerebralis)?

A

Dogs

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8
Q

What are the clinical signs seen with gid and how is it treated?

A

Circling, head tilt, unilateral blindness, skull softening

Surgical removal

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9
Q

What is the prognosis of gid?

A

Good if cerebral

Poor if cerebellar

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10
Q

How can gid be prevented?

A

Worm dogs regularly with praziquantel

Keep dogs away from sheep carcasses

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11
Q

Listeriosis is caused by Listeria monocytogenes found in contaminated or mouldy silage. What age is Listeria common in?

A

18-24 months

Changing molar teeth allow buccal infection - ascends into brainstem

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12
Q

What cranial nerves may be affected by listeriosis?

A

Trigemial nerve - salivation, food impaction in cheek

Facial nerve - paralysis

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13
Q

How is Listeriosis diagnosed?

A

CSF or post-mortem

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14
Q

How is Listeriosis treated?

A

Supportive care
Remove silage
Benzylpenicillin, procaine penicillin, dexamethasone

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15
Q

Louping ill is tick borne. What season does it typically occur?

A

Spring-Autumn

When ticks around

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16
Q

How is louping ill prevented?

A

Vaccine

Tick control

17
Q

Scrapie is a notifiable TSE disease. How does it present?

A

Neurological signs - high step ataxia, aggression etc

Skin disease - pruritis, wool loss, scratching

18
Q

Vestibular disease may cause horizontal nystagmus, facial nerve paralysis and aural discharge. It is often associated with which type of ear infection?

A

Otitis media extending up Eustachian tube

19
Q

What bacteria are commonly associated with otitis media and vestibular disease in sheep?

A

Pasteurella
Streptococcus
Trueperella pyogenes

20
Q

What is the treatment for vestibular disease due to otitis media?

A

Penicillin

Sheep (LHW) (16 decks)

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