Microbiology With Diseases By Taxonomy (6th Edition)
Microbiology With Diseases By Taxonomy (6th Edition)
6th Edition
ISBN: 9780134832302
Author: Robert W. Bauman Ph.D.
Publisher: PEARSON
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Chapter 21, Problem 4CT
Summary Introduction

To explain:

The reason behind the development of ulcers by a mutant strain of Helicobacter pylori, which is urease negative only in patients who either consume antacids in larger amounts or those taking drugs to block acid production.

Introduction:

Scientists have discovered a mutant strain of Helicobacter pylori, which is urease negative. The bacteria of this strain are able to cause infection only in patients who either consume antacids in huge amounts or produce less acid.

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All of the following are true about Clostridium tetani, thecausative agent of tetanus, EXCEPT:(a) They are spore-forming rods.(b) They are part of the normal bowel microflora of horses,cattle, and humans.(c) They produce a powerful exotoxin that mediates thedisease.(d) Their toxin elicits muscle stiffness, spasms, and paralysisin the victim.(e) They require oxygen to survive.
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