Skin + Ectoparasites Flashcards
(42 cards)
Aetiology of Orf (Contagious Pustular Dermatitis)…
Parapox virus **ZOONOTIC
Presentation of Orf…
Vesicular/ proliferative scabby lesions
- mouth/ head, teats
- 4-6wk duration
Control of Orf…
- Isolate clinical cases
- Thorough cleaning/ disinfection of buildings, feed troughs, barriers
- Vaccine - ONLY used on infected farms
Vaccine for Orf…
- Live vaccine applied to skin (axilla/ groin)
- DO NOT use indoors- vaccine scabs are infectious
Tx of Orf…
ABs for secondary infection
Cleaning
Aetiological agent of Sheep Scab…
Psoroptes ovis (mite)
Clinical signs of Sheep Scab…
- Pruritus, wool loss, moist yellow wool
- Progressive distress, inappetence, weight loss, seizures, death
Diagnosis of Sheep Scab…
- Skin scrape of exudative lesions
- Moredun ELISA test
Procedure of skin scrapings in sheep…
Drop of KOH (warm) -> leave 15mins -> wool pluck + skin scrape
Tx of Sheep Scab…
- Dexamethasone/ ABs (severely affected)
- Organophosphate dip- Diazanon
- MLs- Ivermectin, Doramectin, Moxidectin
Clinical signs of Chorioptes bovis…
- Ventrum, scrotum
- Pruritus/ dermatitis
- Infertility (inflammation of scrotum)
Dx of Chorioptes bovis…
Skin scrapings
Tx of Chorioptes bovis…
OP dip
Most common lice in sheep…
Chewing lice - Bovicola ovis
Clinical signs of lice…
- Pruritus, fleece loss
- Back, flanks, HLs
- Clumps of red/brown lice
Tx of lice…
- Pyrethroid pour-ons (e.g. Cypermethrin)
- Plunge dip (Diazinon)
**ONLY if lice causing problem for sheep
Aetiology of Fly Strike…
Lucillia sericata
Clinical signs of Fly Strike…
- 1st sign = patches of discoloured wool
- Agitation of sheep, toxaemia, depression, death
Risk factors of Fly Strike…
- Temp, humidity
- Wounds, lameness, faecal soiling, tail docking
- Carcasses on farm
Tx of Fly Strike…
- Clip + clean wounds
- Kill maggots w/ synthetic pyrethroid pour-on
- Supportive care (ABs, NSAIDs, fluids, house)
- Severe cases = euthanasia
Control of Fly Strike…
Shearing, digging (clip back ends), worm control, lameness control, carcass disposal
Prevention of Fly Strike…
Cypermethrin pour-on
Insect Growth Regulators (stop larval development)
Monitor for clinical signs
Aetiology of Headfly…
Hydrotea irritans
Tx/ control of Headfly…
Housing until wounds heal, Tx as with fly strike
