quizzes Flashcards
The infective stage for a trematode is usually
Metacercaria
What is characteristic of all cyclophyllidean tape eggs
hexacanth embryo
Cysticercoid develops into how many adults?
one
Trichostrongyle egg contains multi-celled morula so these parasites are
Oviparous
Ovoviparous
Egg is larvated
Acanthocephalan life cycle
Indirect
Acanthocephalans found in what part of vertebrate DH
Small intestines
These parasites have a thorny proboscis
acanthocephalans
Lappets are characteristic of
Anoplocephala perfoliata
Intermediate host of Habronema muscae?
Coprophagous fly
Adults or L1 larvae of this nematode found in lacrymal duct of horses
Thelazia lacrimalis
Best way to dx oxyuris equi
scotch tape test
Patent infections of dictyocaulus arnfieldi are more likely found in what host?
Donkey
ID of strongyles can be done in what life stage (two)
L3 larvae
Adult
L4 larva of strongylus vulgaris form thrombi in the
cranial mesenteric artery, dev. to L5
Synchronous emergence of encysted L4 stages of small strongyles from tissue is
larval cyathostomiasis
Dicroceolium dendriticum uses what intermediate hosts?
terrestrial snail and ant
Best diagnostic method to ID Fasciola hepatica eggs in feces
Sedimentation
Intermediate host of Taenia ovis
Sheep
Intermediate host of Taenia hydatigena
Sheep
Intermediate host of Echinococcus granulosus
Human
Cow
Intermediate host of Taenia saginata
Cow
Intermediate host of multiceps multiceps
sheep
HOTC complex
Haemonchus
Ostertagia
Trichostrongylus
Cooperia
Ability of nematodes to arrest development and go dormant
hypobiosis
Protostrongylus rufescens and Muellerius capillaris both found in feces of goats, whats the difference?
Protostrongylus has a pointy tail
Meullerius has a kinky tail
Intermediate host for Gonlylonema verrucosum
Dung beetle
Two ways to distinguish between trichuris and capillaria
Trichuris has darker smooth egg with polar circles at end
Caseous nodules found in intestines of cattle from
Oesophagostomum radiatum
Remember strongyloides egg is
larvated (I think)
Milk spots in young pig liver likely
Larval migration of Ascaris suum
Metastrongylus spp use what intermediate host
Earthworms
Trichinella spiralis develops sylvatic and urban cycles. Sylvatic cycle characterized by
Transmission between wild carnivores and prey
Measly pork caused by
Taenia solium
This parasite diagnosed using urine sediment
Stephanurus dentatus
Procedure to recover trichostrongyle eggs
Fecal float
Procedure to recover Fasciola hepatica eggs
Fecal sedimentation
Procedure to recover Meullerius capillaris larvae
Baermann
Procedure to recover Moniezia eggs
fecal float
Procedure to recover parascaris equorum eggs
fecal float
Life cycle of giardia
direct (zero IH)
Tritrichomonas foetus can be recovered from cows using what sample?
vaginal mucous
Turkeys become infected with Histomonas meleagridis via
Eggs of Heterakis gallinarum AND
Earthworms that have ingested eggs of Heterakis
With Eimeria spp which stage of development happens outside the host?
Sporogony
Name 1 way the lifecycle of cryptosporidium differs from Eimeria
Sporogony happens in the host