You Are a Volunteer for Nurses Without Borders and Are

question 53

Multiple Choice

You are a volunteer for Nurses Without Borders and are being sent on a humanitarian mission. You are somewhat concerned because you have learned from the CDC website that antibiotic-resistant Haemophilus influenzae is common in the country to which you are being sent. This encapsulated, Gram-negative bacterium can cause a variety of illnesses, including community-acquired pneumonia. You do some research on the genetics of this pathogen.
-H. influenzae has genes that it needs to make pili for attachment to host cells. These pili genes are not always expressed; sometimes the bacterium turns them off and does not produce pili. This is an example of 

• A) phase variation.
• B) antigenic sensing.
• C) two-component control.
• D) transduction.
• E) gene splicing.

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Definitions:

Run Chart

A graphical representation used in process improvement that displays observed data points in a time sequence, helping identify trends or patterns.

Sample Statistic

A numerical measure that describes some characteristic of a sample of data.

Special Causes

Unusual or non-random factors that cause variation in a process, distinguished from common causes that are inherent to the process.

Quantitative Sample Statistic

A numerical measurement that describes an attribute of a sample of a population.