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.

Question

Quizplus · Accepted Answer

The symptoms described are consistent with a Giardia infection, which is caused by the diplomonad Giardia intestinalis. Giardia lack mitochondria and have multiple flagella, as described in the question. The other options listed do not fit the described symptoms or characteristics.

While Out Hiking, You Drink Water from a Stream