The Gram stain procedure uses ______ as the counterstain.

A halophile ____.

An important waterborne pathogen may include Giardia sp. which may cause diarrhea. 

Differential media may allow for visual differentiation of organism colonies.

Thermal death time is the longest length of time required to kill all test microbes at a specified temperature.

Microorganisms are unimportant when considering bodies of water.

A vector may be biological or mechanical.

A ____ may be secreted by a bacteria.

In positive staining, the dye is repelled from the microbe.

A disease that is sporadic is ___.