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30 Cards in this Set
- Front
- Back
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Why are lungworms called lungworms?
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If you have to ask, you'll never know. DUH! Because the adults infect the LUNGS!
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T or F:Lungworms are a superfamily of order Strongylida.
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True
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What is the major lungworm of cattle? Which larval form is ingested?
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Dictyocaulus viviparus; L3 is ingested
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How are Dictyocaulus larvae spread?
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Via pilobolus fungi
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T or F:Cattle lungworm infection is diagnosed by identification of eggs in feces.
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False!Larvae (L1) are found in the feces; need to use Baermann funnel test
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How is Dictyocaulus treated?
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Most antihelmenthics work well
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How does the life cycle of the sheep lungworm Muellerius capillaries differ from dictyocaulus?
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Uses slugs/snails as intermediate host
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How does the life cycle of the swine lungworm Metastrongylus differ from dictyocaulus?
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Uses earthworms as intermediate host
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T or F:Cats commonly contract lungworms by eating the intermediate hosts of Aelurostrongylus abstrusus.
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False!Slugs/snails are the intermediate hosts and mice/voles are the PARATENIC hosts
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What is unique about the life cycle the dog lungworm, Filaroides?
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L1 larvae are INFECTIVE
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What are the hosts of Oesophagostomum spp? (circle the letter of your choice)A .Cattle and sheepB. Cattle, sheep, pigsC. Cattle onlyD. Sheep only
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B. Cattle, sheep, pigs (also goats)
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What stage/s are parasitic in Strongyloides spp. infections? i.e., what stages would you find inside/infecting the host?
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All stages except that adult is only female
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What is the cause of cutaneous larval migrans in humans?
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Hookworm
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What is premonition?
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When an acutely parasitized organism develops a degree of resistance after the parasitism becomes chronic
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What is the diagnostic stage of lung worms and where would you find this stage?
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Baermann technique, fecal float, tracheal wash/sputumhas eggs or L1
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What are some morphological characteristics of Ascaridae?
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3 lipslarge and white roundwormsno bursa on malesthey make your butt look ugly
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T or F:Ascarids have infectious eggs.
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True! They hatch as L2 or L3 after egg is ingested.
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Why are ascarids tough to get rid of?
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Sticky eggsEggs are tough to kill (thick shell)Larvae develop to L2 or L3 in eggs
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T or F:Ascarids undergo tracheal migration.
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True! Even though they don't penetrate the skin (a la Rhabditids or Ancylostomids), they undergo tracheal migration after penetrating the intestinal mucosa
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What lesions are caused by Ascirus suum that will condemn pig livers? How are these lesions formed?
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Milk spot liver from ascarid larval migrans
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T or F:Normal ascarid infection does not manifest with anemia.
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True! Ascarids eat the host food, not the host!
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What is the ascarid that infects humans? Horses?
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Ascaris lumbroidesA. equorum
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T or F:Older horses are immune to Ascaris infection.
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True! Once they are >2yo, they have immunity.
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What are some management strategies that can prevent ascarid infection in foals?
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pick up manurefeed off the grounduse ivermectin/pyrantel for adult roundwormsdeworm all horses stabled together at once (???)
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Ascarid infection of which domestic animal may have acetone (fruity) breath as a sign?
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Cattle infected by Toxocara vitulorum
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Which ascarid is a zoonotic agent? How is it most likely transmitted?
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Bayliascaris procyon (raccoon ascarid) transmitted via direct infection of dogs
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T or F:Toxascaris leonina exhibits no tracheal migration in either dogs or cats.
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True!Larvae are eaten either directly or within paratenic host (rodent), undergo period of histotrophy, then enter intestinal lumen.
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Yuk! Your damn cat puked a worm on my shoes! What kind of worm is it likely to be?
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Toxocara catiFrequently vomited; have arrowhead cephalic region
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These ascarids are parasites of marine mammals and birds... |
Survey says....ANISAKIDAE
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What are the intermediate hosts of anisakids? What is the definitive host? What is a dead-end host?
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Intermediate - crustaceans and fishDefinitive - sea mammals and birdsDead-end - Humans
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