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how long can the toxocara canis (roundworms in dogs) ascarids get
- females-greater then 20cm
- males- around 10cm
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what is the route for tracheal migration
- dog ingest egg
- the larvae hatches
- larva migrates to the lungs
- climbs up the trachea
- dog coughs it up than swallows to the GI tract
- it matures to adult in intestine
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where would you find tracheal migration and what signs will you see
- in pups less than 3 months
- may see respiratory signs
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what is the route for somatic migration
- eggs ingested and hatched
- larvae migrates thru the tissues
- encyst in tissue
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what happens if animal is prego with somatic migration
- excyst late gestation
- get to the pups thru placenta or milk
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where will you see somatic migration
in pup older than 3 months
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habronema spp.
- eqine nematode
- stomach worm
- most provelent in moist warm climates
- intermitted host are flies
- adults develop in the gastric mucosa
- larvae in the feces and are ingested by magets who mature into flies, flies feed on horses lips and deposit the larvae that swallowed and matured
- causes summer sores in horses
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how do oxyuris equi look
- "pinworms"
- white to gray in color
- very small
- pointed tail
- male- less than 12 mm
- females- 75-150mm
-
oxyuris equi
- pinworms in horses
- lift tail head and see it-tape test or flashlight at night
- simple direct life cycle
- tail head is irrated
- females live in secum exit through the spinter, eggs drop off and land on ground or on the feed
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strongyles
- elongated thin walled ova
- contain morula-grape cluster appearance
- seen in many species
- many species are blood suckers- referred to as hookworms
- small-12mm
- large-38-47mm
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how are pinworms diagnosed
with celephane tape
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blood in stool dark vs bright
- dark is digested blood
- bright comes from further down in the intestine, its ingested
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abbert migration
- worse if it happens in a host it should be in
- unnatural
- may or may not hurt the animal
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strongyles large vs small which one is more pathogentic
large one because it has a long and wondering life cycle
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prepatent period
- the time before the inital infection and they start laying eggs or can be detected
- going to see clinical signs but they haven't started laying eggs
- ex)hookworms 12 days
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direct life cycle
- does not require another
- can reinfect that host again and again
- does not have an immediate host
-
indirect life cycle
- requires another host in order for it to complete the cycle to become infective
- involves an intermiediated host
- ex) tapeworms comes from flies
- heartworms come from mosquitos
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which is bigger roundworms tapeworms or whipe worms
roundworms
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what are considered protozoa
giardia and coccidia
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ectoparasites
- parasites living on the host
- examples) mites, ticks, fleas, myiasis producing flies
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endoparasites
- internal parasites
- parasites that live within the body and feed on the tissues or body fluids or compete directly with there food
- examples) protozoa, trematode, tapeworms, nematodes
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whats is the diagnosis for an ectoparasite
- skin scraping for mange mites
- observe where fleas like to go like the tail
- culture
- tape test
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what is the diagnosis for an endoparasite
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