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Equine Ectoparasites

Equine external parasites - scientific names, key points

Horse/deer fly Tabanus spp. vicious biters, only females bite, strong fliers, daytime feeders dmg = anticoagulant into wound → blood to ooze up to 8 hr (2nd invasion) EIA Life cycle varies 70 d - 2 yr Do not enter dark buildings
Stable fly/house biting fly Stomoxys calcitrans Both sexes vicious biters, daytime Adults can fly up to 90 mi from site Only visit animal to feed, 80% time off animal Requires several blood meals before eggs can be laid (3 min) Prefers legs, fly near ground from wind HABRONEMA
No-see-ums Biting midges Only females feed on blood Phlebotomus flies Dmg = allergic dermatitis w/possible lesion formation. blue tongue virus or african horse sickness
Horn fly Haematobia irritans attack horse pastured near cattle only develop in cow manure mating takes place on host Ivomec kills larvae in manure
House fly Musca domestica do not bite/feed off blood found inside stables, breed in manure Dmg = mechanical vectors, annoyance, HABRONEMA, PINK EYE, BOVINE MASTITIS Manure removed more often in summer
Blow fly/screw worms Cochliomyia hominivorax Larvae develop feeding on dead/living tissue sterilized male flies
Biting louse Bovicola equi
Sucking louse Haenatppinus asini only live 2-3 d off of host
Tail and Hock mange Chorioptes equi patchy areas of rough skin, scabby at edges feet and lower hind legs. Live on host entire life, feed of skin, do not burrow. high temps kill mites
Scale and wet mange Psoroptes equi Rare. suck lymph fluid, found on edge of ooze, can survive off hose 2-3 wk, prefer thick hair during winter horses will scratch Tmt = organophosphate
Dry mange or itch mange Sarcoptes scabiei ZOONOTIC burrow female dies after mating, males die after mating secrete irritating toxin rub and scratch
Created by: 1382306439