Urea Agar Is Set Up for Quality Control Purposes Using

question 4

Multiple Choice

Urea agar is set up for quality control purposes using two Trichophyton spp.-T.mentagrophytes and T.rubrum.After the appropriate amount of incubation,both organisms are negative.Which one of the following statements explains this discrepancy?

• A)The medium is most likely expired.
• B)These two Trichophyton spp.are poor choices for quality control.
• C)The phenol red indicator is not working because both organisms are positive for urea.
• D)No discrepancy is present;both organisms are negative for urease activity.

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Definitions:

Variance

A statistical measure that represents the dispersion or spread of a set of data points or values around their mean.

Time-Cost Tradeoffs

In project management, the relationship between the time to complete a task and the cost associated with it, illustrating how increasing speed can lead to higher costs.

CPM Networks

CPM Networks, standing for Critical Path Method Networks, are project management tools used to schedule, organize, and coordinate tasks within a project.

Project Crashing

A project management technique used to reduce the project duration without altering the scope of the project, by adding resources to critical path tasks.