Exam 8: Use of Colony Morphology for the Presumptive Identification of Microorganisms

Alph ( $\beta$ )-hemolysis is

A microbiologist is reading stool culture plates. She sees an organism that has a large, mucoid pink colony on MAC. What is a good presumptive identification of this organism?

The colonies growing on the SBA have produced a wide, deep, clear zone around and under the colonies. This is consistent with which type of hemolysis?

Plate reading is

The relative concentration of bacteria on culture plates is directly proportional to

Colonies growing on the SBA have discolored the media to a green color around and under the colonies. This is consistent with which type of hemolysis?

Generally, microbiologists observe the colonial morphology of organisms on primary culture after how many hours of incubation?

All the following colors are commonly used to describe bacteria, except

When microbiologists set up a biochemical identification using a commercial system on a suspected pathogen from a culture, they must

Swarming is

Gamma ( $\gamma$ )-hemolysis is

Colonies of Bacillus anthracis are described as

Which of the following descriptions will directly facilitate identification of bacteria?

Beta ( $\beta$ )-hemolysis is

The density of the bacterial colony can be described by all the following, except

When differentiating colony size on the culture plates, what organisms generally have the larger colonies by comparison?

A term used to describe colonies that resemble coins is

A microbiologist is reading a vaginal culture. She sees the very white colonies that are non -hemolytic on a BAP but appear to have feet. What organism could this possibly be?

When looking at a tube of thioglycollate broth, streamers or vines and puffballs are visible. What organism grows like this in thioglycollate?

The term used to describe colonies that are solid in color and that do not allow any light to pass through is