Ectoparasite Control in LA Flashcards
What is this skin disease?
Orf - virus and potential of 2° Bac infection
What would you use to treat Orf?
Antibiotics/Antibacterials
-Based on C+S and NSAIDS commonly used
What is this skin diease?
Flystrike - issue with soiled fleece + infected with maggots
What would you use to treat Flystrike?
- Shear as tx cannot penetrate the wool
- Can see affected area and can wash
- Pyrethroids - pour on (only one licensed)
What is the action of Pyrethroids?
- Ectoparaciticides
- Block sodium channels in nerve cells and
induce paralysis
What is used to prevent Flystrike?
Insect growth regulators
• Cyromazine - Chitin synthesis interference
• Dicyclanil - Molting interference
What is this skin disease?
This is Lice (Hair loss, pruritic)
What is the treatment for Lice?
Pyrethroids
(Organophosphates dips- AChE receptor blocking)
Why are Organophospates not used as frequently anymore?
- Highly toxic to all species
- Diazinon only UK approved active ingredient
• Requires external company to come in with dips + dispose of
+ High quality PPE
• Post dip lameness - older lambs affected by E.rhusopathiae - infection through small abrasions - CS: Stiff
What is the skin disease?
Scab
What is the treatment for Scab?
- Macrocylic lactones (Clear drench) - dual action - wormer too
- Organophosphates
What is the action of Avermectins/Macrocyclic Latones?
- Bind to glutamate-gated chloride channel receptors
- Flaccid paralysis of pharynx
- Internal/External parasites affected
AD: Easy to administer than op dips
DISAD: affects worming regimes
What is this skin disease?
Ringworm
What is the treatment for Ringworm?
Antifungals - only one licensed: Enilconazole - block synthesis of ergosterol
Need to wash animal every other day - unlikely to happen
Other TX: vaccines or turn out and cures spontaneously
What is this skin disease?
Mange
Affecting the Rump, red, sore
What is the treatment for Mange?
Macrocyclic Latones
What are the withdrawal times for meat and milk under licensing?
Milk W: 7d
Meat W: 28d
