Cestodes and Nematodes in Small Animals Flashcards
What is the definitive host of Dipylidium caninum?
Dogs and cats
Where in the dog/cat does D. caninum live?
Small intestine
What clinical signs does D. caninum cause?
Sometimes none, scooting d/t perianal irritation, non-specific GI signs
How is D. caninum transmitted?
Ingestion of fleas/lice (intermediate host)
How does D. caninum spread from the dog/cat?
Gravid proglottids passed in feces
How do you dx D. caninum?
Break open proglottid to visualize egg w/saline
Why is ID of D. caninum difficult on fecal float?
Eggs don’t consistently float, proglottids don’t uniformly distribute in feces
How do you prevent D. caninum infestation?
Good flea and lice control
Is D. caninum zoonotic?
Yes
How do you treat D. caninum?
Praziquantel
What is the most common Taenia spp to affect dogs?
T. pisiformis
What Taenia spp affects cats?
T. taeniaeformis
What are clinical signs of Taenia infection?
Sometimes none, scooting, GI impaction
How is T. pisiformis transmitted to dogs?
Ingestion of rabbit (int. host) tissue that contain cystercerci
How is T. taeniaeformis transmitted to cats?
Ingestion of rodent (int. host) tissue that contain strobilocerci
How do you dx Taenia?
Proglottids in feces, high specific gravity fecal float
What other organism do Taenia eggs look like under the microscope?
Echinococcus eggs
How do you prevent Taenia infection?
Elimination of predatory activities
How do you treat Taenia in dogs and cats?
Praziquantel, fenbendazole
What are clinical signs of Echinococcus?
Sometimes none, alveolar = resp signs
What is the definitive host of Echinococcus granulosus?
Dogs
Where do E. granulosus live in the host?
Small intestine
What is the intermediate host of E.granulosus?
Ungulates
How is E. granulosus transmitted to dogs?
Ingestion of int. host tissue containing hydatid cysts
How do you dx E. granulosus?
High sp. gravity fecal float
What is the intermediate host of E. multilocularis (dogs) and E. multiloculari (cats)?
Rodents
How do dogs and cats become infected with E. multiloculari/multilocularis?
Ingestion of int host containing multilocular cysts
How do you dx E. multilocularis/loculari?
CELISA or PCR
How do you treat Echinococcus spp?
Praziquantel
What are clinical signs of Toxocara spp?
Sometimes none, V+/D+, difficulty gaining weight, unthriftiness, pot-bellied puppies/kittens
What age group is more severely affected by a high Toxocara or Ancylostoma burden?
Puppies and kittens - can be life threatening
Where do Toxocara spp live in the host?
Small intestines
How do Toxocara spp. get to the small intestine of the host?
Migrate through liver/lungs, coughed up and swallowed
Is Toxocara or Ancylostoma assoc. w/visceral larval migrans in humans?
Toxocara canis
What does Ancylostoma caninum cause in humans?
Cutaneous larval migrans
What is the most common transmission route of T. canis?
Transplacental/transuterine
How do you dx Toxocara spp?
Fecal float
How is T. cati transmitted?
Ingestion of eggs w/L2 larvae, ingestion of paratenic host, transmammary
How is Toxocara leonina different from other Toxocara spp?
Migration outside GIT does not occur
How do you treat Toxocara?
Fenbendazole, Moxidectin, Pyrantel, Milbemycin
What are clinical signs of Ancylostoma spp?
Sometimes none, D+, anemia, lethargy, melena, wt loss
What is the most important route of transmission for Ancylostoma caninum?
Transmammary
How do you dx Ancylostoma spp?
Fecal float
How is A. tubaeforme transmitted to cats?
Ingestion of L3, skin penetration
Does A. tubaeforme have transplacental or transmammary transmission?
No
Which species does A. tubaeforme affect?
Cats
Which species does A. caninum affect?
Dogs
Which species does A. braziliense affect?
Dogs and cats
How do you treat adult A. caninum?
Fenbendazole, Milbemycin, Moxidectin, Pyrantel
How do you treat L4 A. caninum?
Moxidectin
How do you treat A. tubaeforme?
Emodepside, Ivermectin, Pyrantel, Milbemycin, Moxidectin
How do you treat L4 A. tubaeforme in intestines?
Emodepside, Moxidectin
How do you treat A. braziliense in dogs?
Pyrantel
What is the most common route of infection of U. stenocephala in dogs?
Oral
How do you dx. U. stenocephala?
Fecal float
How do you treat U. stenocephala?
Pyrantel, fenbendazole, Moxidectin
What are clinical signs of Trichuris?
Sometimes none, D+/hemorrhagic feces/tenesmus
Which nematode infection can cause “pseudo-Addison’s”?
Trichuris spp.
Which nematode has very resistant eggs that can persist for years in the environment?
Trichurs spp.
What are more severe clinical signs of Trichuris?
Wt loss, anemia, lethargy, V+
What is the definitive host of T. vulpis?
Dogs
Where in the host does T. vulpis live?
Mainly cecum
How is T. vulpis transmitted to dogs?
Ingestion of L2 stage eggs
How do you dx T. vulpis?
Fecal float w/centrifugation and high sp. gravity
Why are T. vulpis difficult to dx of fecal foat?
Intermittent shedding, small # of eggs
How do you treat T. vulpis?
Febantel + Pyrantel, Drontal Plus, Fenbendazole for 3d
What medication does NOT treat A. caninum?
Praziquantel
What does an A. caninum egg look like?
Thin wall w/2-8 cells
If you have a cough in a young puppy, what parasite might you suspect?
Toxocara canis
Which canine parasite causes visceral and ocular larval migrans in humans?
T. canis (roundworm)
Which canine parasite causes cutaneous larval migrans in humans?
A. caninum (hookworm)
What tapeworm is fatally pathogenic in humans and what does it cause?
Echinococcus granulosis causes hydatid cyst disease
How do you treat E. granulosus?
Praziquantel
What do Dipylidium caninum proglottids look like in feces?
White rice
What is the intermediate host of D. caninum?
Fleas
How many sporocysts do Eimeria eggs have?
4
How do you treat Eimeria infection in birds?
Fluconazole