BIOLOGY
12th Edition
ISBN: 9781260169614
Author: Raven
Publisher: RENT MCG
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Chapter 27, Problem 1S
Summary Introduction
To provide: The way through which H. pylori be diagnosed using the knowledge that urease enzyme it produces in the stomach converts urea into ammonia and carbon dioxide.
Introduction: Any bacterium that can cause disease is known as bacterial pathogen. Many of the human diseases are caused due to bacterial infections. This includes tuberculosis, staphylococcal and streptococcal infections, and sexually transmitted diseases.
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If there is a causal relationship between the presence of H. pylori and ulcers, how might you explain that 50% of the patients with a normal endoscopic examination were infected with the bacteria?
Mutant strains of Helicobacter pylori that lack the ability to produce urease fail to cause infection when they are swallowed. Infection occurs, however, if a tube is used to introduce them directly into the layer of mucus that overlies the stomach epithelium. What does this imply about the role of urease in the bacterium’s pathogenicity?
How can we prove the pathological and clinical effects of cholera are caused by the production of enterotoxin?
Chapter 27 Solutions
BIOLOGY
Ch. 27.1 - Prob. 1LOCh. 27.1 - Prob. 2LOCh. 27.1 - Describe classification systems for prokaryotes.Ch. 27.2 - Prob. 1LOCh. 27.2 - Prob. 2LOCh. 27.2 - Prob. 3LOCh. 27.3 - Prob. 1LOCh. 27.3 - Prob. 2LOCh. 27.3 - Prob. 3LOCh. 27.4 - Describe the metabolic strategies employed by...
Ch. 27.4 - Compare and contrast the ways prokaryotes can...Ch. 27.5 - Describe the role of prokaryotes in biogeochemical...Ch. 27.5 - Prob. 2LOCh. 27.5 - Prob. 3LOCh. 27.6 - Prob. 1LOCh. 27.6 - Prob. 2LOCh. 27.6 - Prob. 3LOCh. 27 - Data analysis If the excision of an F plasmid Is...Ch. 27 - Prob. 1IQCh. 27 - Prob. 1UCh. 27 - A bacteria that obtains carbon from the atmosphere...Ch. 27 - Prob. 3UCh. 27 - Bacteria and archaebacteria may be distinguished...Ch. 27 - Prob. 5UCh. 27 - Prob. 6UCh. 27 - Prob. 7UCh. 27 - Prob. 1ACh. 27 - Prob. 2ACh. 27 - Prob. 3ACh. 27 - Prob. 4ACh. 27 - Prob. 5ACh. 27 - Some bacteria are capable of forming NH4+ from...Ch. 27 - Prob. 7ACh. 27 - Prob. 1SCh. 27 - Prob. 2SCh. 27 - Use of multiple antibiotics is not a bad idea if...Ch. 27 - Soil-based nitrogen-fixing bacteria appear to be...
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- How can we prove the pathologic or clinical effects of V. cholerae are due only to the production of the enterotoxin by the pathogen? (hint: exclude endotoxin LPS)arrow_forwardWhy is Salmonella typhi a gram negative bacilli? Explain.arrow_forwardWhy mightproteorhodopsin make a bacterium such as Pelagibacter morecompetitive in its habitat?arrow_forward
- Raw poultry can carry Salmonella or Campylobacter bacteria, both of which produce toxins that can cause serious diarrhea, among other symptoms. Aside from the discomfort, why does such an infection require immediate medical attention?arrow_forwardWhat diseases are caused by enterobacter aerogenes? Is Enterobacter aerogenes Gram negative or positive?arrow_forwardWhat part of the Escherichia coli cell contains endotoxin?arrow_forward
- How does urease allow H. pylori to live in the stomach?arrow_forwardWrite a paragraph describing the colonies of: A) Clostridium perfringes B) Clostridium tetani C) Clostridium botulinumarrow_forwardConsider a gram-negative pathogen isolated from marine mammals. This pathogen is subjected to a series of tests and found to have the following characteristics: oxidase-positive, does not hydrolyze urea, produces indole, does not produce acetoin. Which of the following could it be? O Pasteurella mulocida O Klebsiella pneumoniae O Yersinia enterocolitical O Mannheimia haemolyticaarrow_forward
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