Parasites Flashcards
bloodworm, redworm, or sclerostomes
Large strongyle
How many species of small strongyles are there and how many are prevalent?
40 species: 10 prevalent
what is the clinical sign of a horse infested with strongyles?
anemia
What are small strongyles referred to as?
cyathostomins
prepatent period for Large Strongyle
6-11 months
What is the treatment of choice for strongyles?
Anthelmintics: fights against parasitic worms
what drugs of anthelmintics
benzimidazoles, pyrantel, and ivermectin
what are the 3 species of large strongyles and explain them
S. vulgaris: in the mesentric artery, treated with ivermectin and moxidectin. also Fendbendazole and oxfendazole
S. Edentatus: damage intestinal serosa, burrow into sumucosa and molt into 4th larva stage
S. Equinus: penetrate intestine and move to liver
small strongyles don’t migrate outside of intestines.
True
What type of family are small strongyles?
Strongylidae
treatment for small strongyles
adults removed from gut lumen. High concentrations of ivermectin work to treat the larvae
a syndrome of sudden weight loss. It is associated with a mass from intestinal wall
larval cyathostominosis
what are roundworms known as
Ascarids
prepatent period of a roundworm
10-12 weeks
source of infection of roundworms
pastures, paddocks, or stalls
signs of migrating roundworm larvae produce with heavy infestations cause
respiratory signs
Gastrophilus spp
bots
what are the 3 major species of bots and describe
Gastrophilus intestinalis: common bot, the eggs are laid on the legs of the horse
Gastrophilus hemorrhoidal: nose or lip bot. eggs are laid on the lips of the horse
Gastrophilus nasalis: eggs are laid on the hair of the submaxillary region
Treatment for bots
remove with pumice stone or bot knife. deworm with ivermectin or moxidectin
Species: oxyuris equi is what?
pinworm
where does irritation start with pinworms?
around the anus
3 species of tapeworms
anoplocephala magna, A. perfoliate, and Paranoplocephala mamillana
symptoms of tapeworms
GI disturbances, ulceration in mucosa, sometimes no symptoms if there is a light infection
Treatment for pinworms
pyrantel, praziquantel, mixtures of ivermectin and moxidectin with praziquantel
Species Strongyloides westeri
Threadworm
Where are threadworms found?
small intestine
how can you prevent threadworms
deworming a mare within 24 hours of foaling
How are threadworms transmitted
transmammary
3 species of stomach worms and locations
Habronema muscae: freely on mucosa
H. microstoma: freely on mucosa
Drashcia megastoma: tumor like swelling in stomach wall
what are the intermediate hosts of stomach worms?
stable flies
how do you treat stomach worms?
ivermectin and moxidectin
species Trichostrongylus axei
Hairworm
when are hairworms a issue?
when horses get combined with ruminants
clinical signs of hairworms
wt loss
treatment for hairworms
Benzimidazoles and ivermectin
