Antiparasitic workshop Flashcards
What mite is this?
Chorioptes
Doramectin (Dectomax) which is an avermectin
2 injections 2 weeks apart to catch eggs hatching
other advice:
- treat all in contacts
- clip out feathers
- treat environment
Which parasites do you want to cover?
Is there a wider public health or disease transmission implication?
Which parasites do you want to cover?
- Roundworms (incl lungworm?), - tapeworms?
- Fleas
Which product(s) will you use & how frequently?
- Roundworms: min 4x/year
- Many possible combinations – need to ensure don’t choose 2 drugs from same group
- Tx for lungworm? If so, monthly milbemycin or moxidectin
- Care with prescribing too far ahead as growth may result in underdosing
Is there wider public health or disease transmission implication?
- Public health issue with roundworms (Toxocara canis) – inc frequency with children/immunocompromised people
What is this
fly strike
At which stage(s) of parasite life cycle will you intervene & where are these stages found?
Aim of treatment in this case?
Which animals will you treat?
At which stage(s) of parasite life cycle will you intervene & where are these stages found?
- Adults in environment, larvae on animal
Aim of treatment in this case?
- Prevention of infestation vs killing existing larvae – products differ!
Which animals will you treat?
- All sheep
What products are available for fly strike?
Pyrethroids:
- kill & repel
- e.g. Cypermethrin, alpha-cypermethrin & Deltamethrin
OP:
- kill, good persistence
- e.g. Diazinon
IGRs:
- don’t kill (not for pre-existing infection)
- e.g. Cyromazine
What other steps can a farmer take to reduce fly strike?
Use of NADIS blowfly alert to identify periods of high risk & take preventative action
Shearing ewes at start of high-risk period
Control of gastroenteritis caused by roundworms in lambs to reduce diarrhoea & thus faecal contamination of fleece
Dagging fleece around tail area to reduce fleece soiling
Correct disposal of carcasses in order to minimise suitable areas for flies to lay eggs
Treat all wounds & footrot lesions promptly
Pour-on chemical formulations to prevent strike/inhibit larval growth
Trapping flies
What is this?
Ixodes ricinus
Main tick in UK
3-host tick (broad range of host mammals)
Vector of Lyme disease
What products can you use against ticks in dogs?
Pyrethroids:
- repel but slow kill
- Flumethrin (Collar, long lasting but not suitable if swimming (toxic to aquatic life & depletion of drug)
- Permethrin (Spot-on, not suitable if swimming, not in household w cats)
Isoxazolines:
- rapid kill but not repellant
- systemic so not washed off
- e.g. afoxolaner & fluralaner
With ticks should environmental or physical methods of control be employed?
Physical control methods – check daily –> manual removal of ticks
With ticks is there a wider public health or disease transmission implication?
Vectors of many diseases
Which treatments?
- anything from group 1-3 (broad spectrum) licensed in sheep
- e.g. doramectin or ivermectin
- group 4 & 5 reserved for quarantine treatments & mid-late season treatments
Who to treat:
- leave 10% of fastest growing lambs untreated to maximise refugia population
Monitoring effect:
- drench efficacy tests (take FECs 1-2 weeks post worming)
Farmer advice:
- wean lambs onto clean pasture if possible (pasture that hasn’t had sheep on that year/year before)
- FECs every 3-4 weeks over grazing season
What is the mode of action of neonicatinoids, give examples, species licensed & parasites used against
What is the mode of action of organophosphates, give examples, species licensed & parasites used against
What is the mode of action of phenylpyrrazoles, give examples, species licensed & parasites used against
What is the mode of action of Isoxazolines & Bispyrazone, give examples, species licensed & parasites used against
What is the mode of action of Macrocyclic lactones , give examples, species licensed & parasites used against
What is the mode of action of Pyrethroids, give examples, species licensed & parasites used against
What is the mode of action of insect growth regulators, give examples, species licensed & parasites used against
What is the mode of action of Benzimidazoles, give examples, species licensed & parasites used against
give examples, species licensed & parasites used against for Salicylanilides
give examples, species licensed & parasites used against for Pyrazinoisoquinolones
What is the mode of action of Tetrahydropyrimidines/ imidazothiazoles, give examples, species licensed & parasites used against
What is the mode of action of Hexahydropyrazine, give examples, species licensed & parasites used against
What is the mode of action of Cyclic octadepsipeptide, give examples, species licensed & parasites used against
What is the mode of action of Aminoacetonitrile derivatives & Spiroindole, give examples, species licensed & parasites used against
give examples, species licensed & parasites used against for Benzenesulphonamide
