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33 Cards in this Set

  • Front
  • Back
whipworm genus?
Trichuris spp. = whipworms

(don't confuse with Trichinella spiralis)
whipworm of dogs & foxes?
Trichuris vulpis
whipworm of cats?
Trichuris campanula
Not serious infection; usually asymptomatic, only a few worms
~not zoonotic
Whipworms have direct or indirect life cycle?
Direct Life Cycle
Whipworm most common means of transmission?
ingestion of L1 embryonated eggs = direct development/ migration
Of the whipworms, which is most avid blood feeder?
Aside from low PCV what other blood cells might be affected?
Trichuris vulpis: avid blood feeders
~causes anemia and eosinophilia
Name species of worm:
Direct life cycle, diverse host range, req. intermed. host but can be same species as!
• larvae found in skeletal muscle
Trichinella spiralis
Trichina worm
• both adults & larval stage found in same host
• definitive host may also serve as intermediate host via cannabilism
Identify species of umembryonated egg.
Greenish tinge with a striated shell.
Assymetrical bipolar plugs
Capillarie (Eucoleus) aerophilia
Assymetrical bipolar plugs
Trichinella spiralis hosts?
hosts: PIGS, rats, bears, cougars, cats, dogs, humans (zoonotic)

-people get if eat raw pork
Identify owner of this egg shed from horse.
Oxyuris equi (horse pinworm)
Identify genis of this egg
Identify species found in urinary bladder of Dog
Capillaria plica - a nematode (roundworm), larvae migrate to bladder where eggs passed out in urine

CPU D(ell)
• blood red color when fresh
• one of largest species of nematodes -> females can grow up to 3 feet in length
• DH = carnivorous mammals e.g. dogs, coyotes, weasles
Dioctophyma renale (Giant Kidney worm)
Capillarie (Eucoleus) aerophilia hosts?
intermediate host?
paratenic host?
Direct lifecycle: dogs, cats, foxes, coyotes
Zoonotic, but very rare (only 11 human cases ever reported)

~can use earthworm as paratenic host
Causes urinary capillariasis?
What must occur for egg to hatch?
Capillaria plica (dog) / feliscati (cat)
~L1 must be ingested by earthworm
What capillaria sp. found in fox and dogs only and causes NASAL capillariasis (sinus mucosa, etc.)?
Capillaria boehmi = Nasal capillariasis

"B" for boogers!
Giant "kidney worm" found in mink?
Is it zoonotic?
Dioctophyma renale
Giant Kidney worm in mink!
Also zoonotic...
Symptoms of Trichinella spiralis in pigs?

In humans?
In pigs, relatively assymptomatic

In humans, TS can be fatal, intestinal forms = enteritis, also can cause paralysis of resp.muscles (e.g. diaphram)
Larviparous (produces larvae)
Trichinella spiralis - no eggs
Diagnosis of Trichinella spiralis ?
serological test e.g. ELISA, EIA, also hemagglutination, PCR, etc.
Describe “Trichina worm” :
“Trichina worm” - small, no spicules on males

Trichinella spiralis shown in picture
Clinical Signs:
• uremia
• worms in urine
• calcification of renal parenchyma
• migration of worms (esp. males) into abdominal cavity (causing peritonitis with adhesions)
Dioctophyma renale
• adults found in kidneys (Right is most common) of host
What is IH for Dioctophyma renale?

Name 4 paratenic hosts?
Infective stages?
Dioctophyma renale
• Intermediate hosts – earthworm (L1 infective)
• Paratenic hosts – fish, frogs, crayfish (inf. stage is L3 same as for DH)
idenitfy species of worm shown:
Oxyuris equi (horse pinworm)
What 2 species that we have to know for this quiz have IH?
1. Trichinella spiralis (DH usually pig also can act as IH; due to cannibalism)
2. Dioctophyma renale (IH earthworm)

note: earthworm is paratenic host for Capillaria (Pearsonema) plica (dogs) & C. (P.) feliscati (cats)
Zoonotic worm causes "larva curens" -> pruitic skin eruptions, auto-infection can occur in immuno-compromised individual.
Strongyloides stercoralis
Name 5 zoonotic species we have to know for quiz:
Trichuris vulpis, Capillarie aerophilia, Dioctophyma renale, Trichinella spiralis, Strongyloides stercoralis
Only female is parasidic, male free-living, very small worm, embryonates (ovoviviparous)?
Strongyloides spp.
Give 3 unique features of Strongyloides spp.

hint: physical char. of infective stage larva
hint2: where found adult parasite found in host?
1. Parasidic males do not occur, only male free living
2. female infectious (3rd) stage has "fiariform esophagus" which extends 1/3 length of body
3. female found in mucosa of S.I.
Primary means of transmission for Strongyloides spp.?
transcolostral, transmammary in dogs, horse, pig, ruminant
(in cat oral more common but later transmammary)
What species produces tumor-like nodules (adenomatous metaplasia of glandular epithelium of intestinal crypts) in S.I.?
What found in nodule?
Strongyloid felis, S. tumefaciens:
Female worm may be found in nodule. Focal granulomas and vasculitis is assoc. with migration of larval stages thr. lungs of experimentally infected cats.
T or F: All Strongyloide female produce EGGS in feces:
False: All DO, except Strongyloides stercoralis. Her eggs hatch in intestine and 1st stage LARVAE come out in feces.
In Strongyloides spp. what are rhabditiform vs. filariform ?
Not sure, think has to do with esophagus type; rhabditiform is homogonic and filariform is infective 3rd stage (later happens after 3 molts)