Lameness in sheep Flashcards
what does lameness in sheep do to ewe + lamb mortality
increases the rates
List the clinical signs of interdigital dermatitis (scald) in sheep
inflammation of skin between claws
reddening
paste
white/ greay scum
List the clinical signs of footrot
Smell
Grey ooze
Under running of hoof horn near to skin between claws
Under-running of horn anywhere
what is the most common cause of lameness in sheep
footrot
List the bacterias involved in footrot and interdigital dermatitis in sheep
Dichelobacter nodosus is the suspected causing agent
and Fusobacterium necrophorum potentially worsens the disease
should we treat footrot and interdigital dermatitis as one condition or as to separate conditions
as one condition
describe contagious ovine digitial dermatitis (CODD)
highly invasive and painful lesions that start at the coronary band
List the clinical signs of CODD
lesions at the coronary band, rapid invasion and underrunning of the hoof wall - no or little interdigital space involvement
what causes CODD
spirochaetes and treponemes
+/- D nodosus infection
Describe how to treat CODD
long-acting amoxicillin or oxytetracycline
Does foot trimming help with CODD
no- increased foot trimming increases the prevalanece of CODD
does foot bathing help with CODD
no - it may help lameness but doesn’t help prevalence of the disease
what is the most important factor for reducing CODD
high biosecurity levels
Describe toe granuloma
inflamed granulomatous tissue coming out from under the horn
what can cause toe granulomas
snipping into sensitive part of the toe during trimming ot chronic unresolved footrot
Describe how to treat toe granulomas
IVRA and cauterise or surgically remove
Describe white line disease
defect on the abaxial solar surface of the horn at the junction of the wall and the sole
List the 2 presentations of white line disease
shelly hoof
toe abscess
Describe shelly hoof - white line disease
soil/debris accumulates at the white line - seen as black half moon
often no lameness seen but can occur is pus and/or damage and/or inflammation occurs
Describe toe abscess- white line disease
sudden onset of painful lameness
pus tracks up and breaks out at the coronary band
small localised black spot seen
Describe how to treat toe abscess
poultice to encourage pus bursting out
Describe foot abscess
deep sepsis of the distal interphalangeal joint - often sequelae to trauma/infection
List the clinical signs of foot abscessess
pain
swelling heat and discharging sinus at the coronary band or interdigital space
Describe how to treat foot abscesses
surgical amputation of the digit
may attempt antibiotic flushing if early enough in the disease process- although this is usually unsuccessful
