Lameness in sheep Flashcards
1
Q
What diseases are associated with the foot?
A
- Footrot - benign footrot, interdigital dermatitis, scald, virulent footrot
- CODD
- White line disease
- Toe granuloma
- Foot abscess
2
Q
What are other problems causing lameness?
A
- Foreign body
- Interdigital hyperplasia
- Overgrown / misshapen claws
- Arthritis
- Fractures
- Muscular
- Neurological disease
3
Q
What is seen with benign footrot / ID / scald?
A
- Lameness
- Interdigital skin inflammed
- No horn underrunning
4
Q
What is the main bacteria causing benign footrot / ID / scald?
A
- Dichelobacter nodosus
- Fusobacterium necrophorum is sometimes found
5
Q
What are factors associated with footrot + ID?
A
- Warm
- Wet under foot conditions
- Muddy
- Housing
- Gathering
- Genetics
6
Q
How would you treat scald?
A
- Topical tx - Oxytet spray
- Foot bathing - formalin
7
Q
How would you treat footrot?
A
- Quickly - isolate
- Treat individuals / groups
- LA oxytet or LA amoxicillin
- Do not trim unless necessary
8
Q
What is seen with CODD?
A
- Ulcerative / proliferative lesion start at coronary
- Progressive under running of hoof wall
- Hoof sloughs off
- Often mixed infection with footrot
9
Q
What are the different grades of CODD?
A
- Grade 1 = coronary band lesion only
- Grade 2 = <50% horn capsule separated
- Grade 3 = 50-100% hoof capsule off
- Grade 4 = healing but still active lesion present
- Grade 5 = healed
10
Q
What is the aetiology of CODD?
A
- Treponeme bacteria
- T. medium
- T. phagedenis
- T. pedis
- Dichelobacter nodosus
- Fusobacterium necrophorum
11
Q
What are risk factors of CODD?
A
- Seasonal trend - late summer / early autumn
- Large flocks
- Lowland pasture / lush pasture
- Footrot / scald
12
Q
How is CODD treated?
A
- Isolate
- Antibiotics - LA amoxicillin - may need multiple courses
13
Q
What can be done to minimize foot problems throughout the year?
A
- Vaccinate twice yearly - footvax
- Treat lame sheep quick
- Biosecurity
- Environmental challenge
- Cull chronically lame sheep
14
Q
What is white line disease?
A
- White line separation
- Doesn’t cause lameness unless sensitive tissue affected - impaction with stones, mud etc
15
Q
How can you treat white line>
A
- If no infection and just separation = trim separation off
- If abscess = trim to release pus - avoid damaging sensitive tissue