The Algorithm Shown Indicates Bacitracin Sensitivity for Only One Group

question 5

Multiple Choice

The algorithm shown indicates bacitracin sensitivity for only one group of Gram-positive cocci.Why is bacitracin sensitivity NOT tested in all of the cases shown?

• A) Testing antibiotic sensitivity in nonhemolytic streptococci is too time-consuming.
• B) All group A beta-hemolytic streptococci are bacitracin sensitive.
• C) Only beta-hemolytic streptococci possess characteristics that make them sensitive to bacitracin.
• D) Nonhemolytic and alpha-hemolytic bacteria are only susceptible to optochin.

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Definitions:

Cohort Study

A research approach involving a group of people observed over a period to determine how certain exposures affect outcomes.

Experimental

Pertaining to a scientific approach involving controlled trials and studies to test hypotheses, investigate cause-and-effect relationships, or demonstrate specific effects.

Observational

Pertaining to research methods that involve watching and recording behaviors or outcomes in their natural setting without manipulation.

Nested Case-Control

A study design used within a cohort study, where a subset of participants with a specific outcome is compared to a subset without the outcome from the same cohort.