Protozoa Morphology

Giardia morphology

trophozoites, cysts

Whats the infective stage of Giardia

cysts

What causes the damage from Giardia to hosts

trophozoite

Giardia dies ? outside of the body

quickly

Giardia - immature cysts have ? nuclei

2

Giardia - mature cysts have ? nuclei

4

Giardia - cysts are ? to the environment

resistant

Giardia - cysts are ? infective once passed in the stool

immediately

Tritrichomonas morphology

trophozoite form only

Balantidium morphology

trophozoite, cysts

The trophozoites of Balantidium are ? (big or small)

big

Entamoeba morphology

trophozoites, cysts

Motile form that moves within the body

Trophozoites

Coccidia morphology

oocysts sporulated and unsporulated

Coccidia is infective at the ? stage

sporocyst

Oocysts can live in the environment for a ? time

long

The oocysts of Coccidia ? always infective immediately (are, are not)

are not

The oocysts of Cryptosporidium ? always infective immediately (are, are not)

are

Cryptosporidium is ? (big, small)

small

Toxoplasma morphology

oocysts, tachyzoites, bradyzoites

Once Toxo sporozoites invade tissue, they develop into

bradyzoites

Masses of Toxo bradyzoites become

pseudocysts

Toxo - The IH ingests the ? , the DH ingests the ? (usually)

oocysts, pseudocysts

Toxo - cats can also become infected by ingesting soil, water, or plants contaminated with ?

oocysts

Toxo - cysts remain throughout the life of the host and can become reactivated by

immunosuppression

Neospora morphology

oocysts, sporulated oocysts

The oocysts/sporulated oocysts of Neospora are indistinguishable from

Toxoplasma

Sarcocystis - The IH eats the ? then the DH eats the ?

oocysts, IH