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Sheep (LHW) > GI diseases of adult sheep > Flashcards

GI diseases of adult sheep Flashcards

1
Q

At what age do sheep get their adult incisors?

A

Front 2 incisors - yearling
Front 4 incisors - 2
Front 6 incisors - 3
All teeth - 4

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2
Q

Quidding indicates a problem with which teeth?

A

Molars

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3
Q

What pathogen causes Johne’s?

A

Mycobacterium avium subsp paratuberculosis

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4
Q

When is the key risk period for sheep to get infected with Johne’s?

A

As lambs - 3-4 weeks old

But doesn’t present until 3-4 years old

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5
Q

What is the gold standard for diagnosing Johne’s and how else can it be diagnosed?

A

Gold standard = enlarged distal mesenteric LNs on PME
Serology ELISA
PCR on faeces

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6
Q

How can Johne’s be prevented in sheep?

A

Vaccination - 4 + 16 wks old
Test and cull suspected cases
Hygiene
Keep older/thinner sheep away from younger ewes

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7
Q

Do sheep develop immunity to liver fluke?

A

No

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8
Q

What temperature is needed for Fasciola hepatica eggs to develop, hatch and for snails to multiply?

A

> 10 degrees c

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9
Q

In what seasons do acute and chronic fasciolosis usually occur?

A

Acute - autumn

Chronic - late autumn, Winter, Spring

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10
Q

How can acute fasciolosis be diagnosed?

A

Post-mortem- gold standard
Fluke FEC
Coproantigen/serum ELISA

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11
Q

What age of liver fluke do albendazole and oxyclonazide kill?

A

Adult only

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12
Q

What age liver fluke is killed by nitroxynil and closantel?

A

Nitroxynil - 10 weeks to adult

Closnatel - 3 weeks to adult

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13
Q

What clinical signs may be seen with acute liver fluke?

A 
Sudden death
Haemorrhage (migrating larvae in liver)
Severe anaemia
Weakness
Dyspnoea
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14
Q

What clinical signs may be seen with chronic liver fluke?

A 
Submandibular oedema (bottle jaw)
Cholangitis - adults in bile duct
Weight loss
Haemorrhagic anaemia
Hepatomegaly and fibrisis
Secondary Black's disease
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15
Q

What pathogen causes lumpy jaw?

A

Actinomycosis bovis

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16
Q

What pathogen causes necrotic stomatitis in lambs due to poor hygiene?

A

Fusobacterium necrophorum

17
Q

What can cause pharyngeal trauma? What are the clinical signs?

A

Dosing guns

Dull, depressed, weight loss, halitosis, pain, cellulitis

18
Q

What is the treatment for pharyngeal trauma?

A

Penicillin or euthanasia

19
Q

What pathogen causes Wooden Tongue (facial abscesses)?

A

Actinobacillus lignieresii

Sheep (LHW) (16 decks)

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