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37 Cards in this Set

  • Front
  • Back
Is Cryptosporidium zoonotic?
Yes
What species of Crypto is zoontic?
C. parvum from cattle
Main clinical sign of Crypto in mammals?
Watery diarrhea
Oocysts of Crypto are excreted in what form?
Sporulated
Treatment options?
No treatment
Best flotation solution for finding oocysts of Crypto is ________
Sugar flotation
Which humans are most at risk?
Immunocompromised
Is T. gondii zoonotic?
Yes
What is the definitive host of T. gondii?
Cats
Life stages of T. gondii and location
Sporozoites--oocysts for intermediate host
Bradyzoites--in tissue cysts
Tachyzoites--rarely happens usually by blood transfusion
Life cycle of T. gondii
Sporozoites from environment-->tissue cysts with bradyzoites in raw and under meat-->tachyzoites in tissues-->EE stages only in cats
How long do cats produce oocysts?
2-3 weeks then develop strong immunity to oocyst excretion
Can be in any organ
Survive for the life of the animal
Latent and can be reactivated if host becomes IC
Tissue cysts
In tissue cysts
Latent states
Responsible for initiating meat induced infections
Bradyzoites
Which stage can give rise to EE stages in cats which produce oocysts?
Bradyzoites
Rapidly dividing stages
Cause tissue destruction and disseminate infection
Stages that cross placenta
Tachyzoites
Which stage causes tissue destruction?
Tachyzoites
What is the sequence of relapse in the IC individual?
Tissue cyst rupture-->bradyzoites to tachyzoite stage conversion
Clinical signs of toxoplasmosis
Any organ can be infected
Pneumonia
Hepatitis
Encephalitis
Ocular disease
What are the sources of Toxoplasma in humans?
Under cooked meat--tissue cysts
Pork, lamb, goat, meat from wild animals
Where can humans pick up oocysts of T. gondii?
Contaminated produce, soil, water, litter box
When is a pregnant woman most likely to infect her baby?
3rd trimester
When will the infection be most severe?
1st trimester
Is it better to know the antibody status of the cat or the pregnant woman?
Pregnant woman
T. gondii causes abortions in...
Sheep, Goats, and Pigs
What treatments are available for T. gondii?
Pyrimethamine and sulfonamides
Clindamycin (+/- pyrimethamine)
Ponazuril-experimental
Is treatment for Toxoplasma for the acute or chronic infection?
Acute
Dogs are the definitive host for what coccidia species?
Neospora caninum
What coccidia species involves the muscle?
Sarcocystis
Is sarcocystis zoonotic?
Yes--S. hominis (beef cattle) and S. suihominis (pig-pork)
Prevalent in grazing and wild animals
Grossly visible cysts can cause carcass condemnation
Sarcocystis
Affects dogs in the south
Tick vector (A. maculatum)
Hepatozoan americanum
Abortions in cattle maintained by transplacental transmission
Neospora
What is EPM?
Equine Protozoal Myeloencephalitis
What is given to treat EPM?
Pyrimethamine plus sulfonamide
Ponazuril
NTZ
What is the definitive host of the EPM protozoa?
Opossum
How is EPM diagnosed?
Western blot on CSF