Excavate Parasites: Giardia and Trypanosomes
This video presents the same text shown beside it, spoken and on screen. It adds nothing the text does not say.
State
Giardia lamblia, a diplomonad, and Trypanosoma species, euglenozoans, are Excavata parasites causing waterborne intestinal illness and insect-transmitted sleeping sickness.
Show
Trypanosoma brucei evades the immune system by repeatedly switching its surface glycoprotein coat, letting the parasite persist despite an ongoing antibody response.
Watch for
Both parasites depend on transmission through a route— Giardia through contaminated water, Trypanosoma through an insect vector— not casual contact alone.