Card Set Information
What are the four classes in the phylum protozoa?
Which class in the protozoan phylum does the Coccidia species belong to?
Which class in the protozoan phylum does Toxoplasma belong to?
Which class in the protozoan phylum does Giardia belong to?
Which class in the protozoan phylum does Sarcoocystis neurona belong to?
What are the two methods of protozoan reproduction?
fission- asexual; dividing
How is a trophozoite different than an oocyst or a cyst?
: capable of feeding and movement
: ova form, usually passed in feces, resistant.
What animals harbor Eimeria type coccidia?
Ruminants, rabbits, birds, poultry
What animals harbor Isospora type coccidia?
Dogs, cats, pigs, primates
How long does it take for an oocyst to sporulate?
1 day- several days
How does coccidia do harm to the host?
Damages small intestine. Cause bloody and muciod diarrhea.
As few as _______ oocysts can cause death in the host in coccidia.
Life cycle of coccidia:
oocysts passed in feces
enter GI tract
trophozoite stage invade columnar epithelial cells in small intestine
transform into gametes
form oocysts, pass in feces
What does "self limiting" refer to in coccidia?
Animal rids itself of infection when all gametes form and make oocysts and are shed from the body.
What is the TX for Coccidia?
: Albon oral susp. Daily up to 21 days, most active against sexual stages.
: Corid oral susp. Daily 7-12 days, effective on both stages.
: Marquis, oral paste. Single dose, repeat 10-14 days, effective on both stages.
What is the causitive agent of toxoplasmosis?
What is the most common way of ingestion of sporulated oocysts of
Life Cycle of
Oral ingestion of sporulated oocyst
infection in small intestine
: 20 days
shed unsporulated oocysts for 2-3 weeks
spoulate in 1-5 days
True/ False: Clinical signs in cats with toxoplasmosis are typically minimal to none.
List ways humans can obtain toxoplasmosis.
ingestion of undercooked meat
ingestion of infected oocysts in soil (gardening, not washing veggies)
ingestion of infective oocysts in cat feces (litterbox)
blood transfusions, organ transplants
raw goat milk
What are the clinical signs of toxoplasmosis in the human fetus?
can develop issues later (blindness, epilepsy, mental retardation)
An increase in Toxoplasma gondii antibodies 2-3 weeks apart may indicate what in cats?
An active infection with Toxoplasmosis.
TX for Toxoplasmosis
Pyrimethamine (inhibit activity until AB levels build up)
List ways to prevent Toxoplasmosis infection in humans:
wash hands after handling meat
thouroughly cook meat
change litter box daily
dont handle litter; wear gloves
wear gloves while gardening
thouroughly wash veggies
What equine disease is associated with
EPM (Equine Protozoal Myoencephalitis)
What is the definative host for
What three factors influence progression of EPM?
number of organisms ingested
period of infection before tx
point on CNS localized and damaged
True/ False: The horse is a paratenic host of
What are some ways to prevent EPM?
cover anything that could attract opossums
clean water supply
processed grain to kill oocytes
max health through proper managment
What lab tests can be used to diagnose EPM?
: detects AB, uses CSF or serum, indicates exposure
PCR (polymerase chain rxn)
: detects antigen, CSF/serum, indicates presence BETTER
TX for EPM
SMZ-TMP + Daraprim
: daily for 6 months
: daily for 28 days
TX does not repair CNS damage
What percentage of dogs and cats harbor Giardia?
Where does Giardia reside in the host?
What are the clincal signs of a Giardia infection?
cyclic, explosive diarrhea w/ mucus and blood, malodorus
steatorrhea (fat in feces)
How is Giardia diagnosed?
direct fecal exam
: observe motility, stain to ID
ZnSO4 centrifuged float
antigen test- in house
How is Giardia treated?
not used in pregnant animals