While Out Hiking, You Drink Water from a Stream

Multiple Choice

While out hiking, you drink water from a stream.Several days later you feel sick with diarrhea and intestinal bloating.Your doctor collects a stool sample and finds unicellular organisms that lack mitochondria and have multiple flagella.You are most likely infected with

A) slime molds.
B) the diplomonad Giardia.
C) kinetoplastid trypanosomes.
D) the ciliate Paramecium.
E) testate amoebozoans.