Self Quiz for "Bacterial Pathogenesis: Factors that Damage the Host"
2. Producing Harmful Exotoxins
b. Type II Toxins: Exotoxins that Damage Host Cell Membranes

Study the material in this section and then write out the answers to these questions.
Do not just click on the answers and write them out. This will not test your understanding of this tutorial.

1. Match the following descriptions with the exotoxin:

_____ Causes lysis of white blood cells and other immune cells by damaging their cell membrane . It is produced by various pyogenic bacteria including Staphylococcus aureus and Streptococcus pyogenes. (ans)

______ Causes the respiratory damage and violent coughing episodes seen during whooping cough. (ans)

______ Damages the membranes of intestinal mucosal cells causing hypersecretion of fluids; triggers the production of inflammatory cytokines; attracts and destroys neutrophils causing them to release their lysosomal enzymes for further tissue damage leading to hemorrhagic necrosis.

2. Usually deep puncture-type wounds are needed for the development of gas gangrene. The resulting infected tissue shows massive edema, is mushy to the touch, and the infection spreads very rapidly through the tissue. In terms of the causative organism and its products, discuss why. (ans)

3. Multiple Choice (ans)

• RETURN TO "BACTERIAL PATHOGENESIS: FACTORS THAT DAMAGE THE HOST - PRODUCING HARMFUL EXOTOXINS: TYPE II TOXINS: EXOTOXINS THAT DAMAGE HOST CELL MEMBRANES"

• RETURN TO UNIT 3 TABLE OF CONTENTS

Gary E. Kaiser, Ph.D.
Professor of Microbiology
The Community College of Baltimore County, Catonsville Campus
This work is licensed under a Creative Commons Attribution 4.0 International License.
Based on a work The Grapes of Staph at https://cwoer.ccbcmd.edu/science/microbiology/index_gos.html.