In Which of the Following Scenarios Would Selective Media Most

question 30

Multiple Choice

In which of the following scenarios would selective media most likely be used to DECREASE the number of normal microbiota?

• A) A nasopharyngeal swab is used to collect a sample from a young woman with inflamed tonsils.
• B) A midstream clean catch is used to collect urine in a young woman with a suspected urinary tract infection.
• C) Venipuncture is used to collect blood from an elderly man with a possible blood infection.
• D) A lumbar puncture is used to collect cerebrospinal fluid from a toddler exhibiting signs of meningitis.

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Definitions:

Critical Value

A point on a statistical distribution that represents a threshold beyond which observations are considered to be statistically significant.

Two-Tailed Tests

Statistical hypothesis tests that consider the possibility of both positive and negative deviations from the null hypothesis.

Critical Values

Specific points on the scale of a statistical distribution that are compared with test statistics to determine whether to reject the null hypothesis.

Upper

Often pertaining to the higher part or section of something; or can refer to a level or boundary that is more than what is typical or usual.