Ectoparasites 4 Flashcards
what is myiasis?
parasitic infection of the body of a live animal by fly larvae
what species cause wool strike in sheep?
Lucilia cuprina
Lucilia sericata
what are the predisposing factors of wool strike in sheep?
soiled wool
heavy rain
high humidity, high temperature
skin folds
what families take part in myiasis?
Calliphoridae
Sarcophagidae
what are the distribution patterns in wool strike in sheep?
perineum, genitalia: urine, feces, breeding, lambing
head: butting
feet: foot rot
flanks, ventral neck, withers: fleece rot after heavy rain
how do you treat wool strike?
clip soiled wool
wound management and removal of larvae
drug depending on species
preventative measures
what are some drug options for wool strike?
dips/plunges/sprays/jetting with organophosphates
insect growth regulators
SC avermectins: less effective
when is fly strike in rabbits with moist dermatitis most prevalent?
summer in temperate climate
what are some predisposing factors for fly strike in rabbits with moist dermatitis?
husbandry
outdoor or mixed outdoor/indoor
dental diseases
obesity
diarrhea
urinary tract diseases
how is fly strike in rabbits/dogs/cats treated?
clipping, mechanical removal of larvae
wound management
supportive care
topical antibiotics
systemic antibiotics
subcutaneous avermectins
Nitenpyram (capstar)
address underlying condition
are bots and grubs species-specific?
yes
what species are cattle grubs?
Hypoderma bovis
Hypoderma lineatum
what is the veterinary relevance in economic losses of cattle grubs?
decreased milk production
weight loss
depreciation value carcass
how are cattle grubs treated?
mechanical removal
drug
pour-on avermectins or organophosphates
what causes cuterebriasis?
Cuterebra spp
what are the hosts of Cuterebra spp?
obligate: rodents and lagomorphs
accidental: dogs, cats, humans
what are the mechanisms that Cuterebra spp use?
tissue damage and secondary infections
ectopic or aberrant larva migrans
anaphylactic reactions