 |  Microbiology, 5/e Lansing M Prescott,
Augustana College
Donald A Klein,
Colorado State University
John P Harley,
Eastern Kentucky University
Pathogenicity of Microorganisms
Web Exercise
1. It has become very
evident that some bacteria have evolved to have the capacity to "turn on"
specific genes during times of growth inside a host. These genes have been referred
to as pathogenicity islands. Use the medical database MedLine http://www.ncbi.nlm.nih.gov/PubMed/
to identify the pathogenicity islands of three Gram-negative rods. What do they
have in common? Are they exchanged between species? Defend your answer.
2. This chapter emphasizes only bacterial toxins and pathogenesis. Many other
organisms, including plants, produce a variety of toxins. Type the word toxin
into your search engine and read about at least twenty different toxins from
organisms other than bacteria - be sure to include inanimate sources. 3. Dr. Kent Getfunding's web site at the Univeristy of Rochester Medical College
has an excellent home paged called "Bacterial Toxins". You can use
this site to examine the history of toxin discovery, toxin function, look at
specific bacterial toxins and test your understanding of the subject.
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2002 McGraw-Hill Higher Education