Which of the Following Statements Describes the Main Virulence Factor

question 85

Multiple Choice

Which of the following statements describes the main virulence factor of E.coli O157:H7?

• A)A pathogen-encoded exotoxin
• B)A bacteriophage-encoded exotoxin
• C)An endotoxin used for host attachment
• D)A coagulase for host clotting
• E)A hemolysin for red blood cell destruction

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Definitions:

Sigmoidoscopy

A medical examination of the sigmoid colon by means of a flexible tube inserted through the anus to check for cancer, polyps, and other anomalies.

Gastroscopy

A diagnostic procedure that involves using a gastroscope to visually examine the interior of the stomach.

Colonoscopy

A medical procedure using a camera to examine the interior lining of the colon and rectum.

Proctoscopy

A medical procedure where a special instrument, called a proctoscope, is used to examine the anal cavity, rectum, or sigmoid colon.