Acanthamoeba is a genus of free-living _______________________ that are common in soils and unchlorinated bodies of fresh water.

Which of the following bacteria are known to causes necrotizing ulcerative gingivitis or trench mouth? (Check all that apply)

Syphilis is spread through direct physical (generally sexual) contact, and is caused by the gram-negative spirochete ________________________________.

Enterotoxigenic E. coli (ETEC), is usually a relatively mild, watery diarrhea, known as…

The protozoan parasite ___________________________causes amoebiasis.

What is is a rare respiratory infection caused by a strain of Chlamydia that is sometimes transmitted to humans from domestic birds? 

For which of the following reactions is ΔS° > 0 at 25°C?

The environment in the stomach is which of the following?

Match the following term with its proper definition.

Plaque on teeth is an example of which of the following? (Choose the BEST answer)