Microbiology: An Introduction (13th Edition)
13th Edition
ISBN: 9780134605180
Author: Gerard J. Tortora, Berdell R. Funke, Christine L. Case, Derek Weber, Warner Bair
Publisher: PEARSON
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Textbook Question
Chapter 22, Problem 1R
If Clostridium tetani is relatively sensitive to penicillin, why doesn’t penicillin cure tetanus?
Expert Solution & Answer
Summary Introduction
To review:
Why penicillin does not cure tetanus.
Introduction:
Tetanus is an infectious disease caused by the bacteria named Clostridium tetani. It is a rod-shaped (bacillus), gram-positive, anaerobic, spore-forming bacteria.
Explanation of Solution
The anaerobic bacteria Clostridium tetani is sensitive to penicillin. However, adequate blood flow to the site of infection is necessary for penicillin to attain an optimum concentration at the site and to show maximum effectiveness. The causative pathogen is an obligate anaerobe and the wound by which it enters the body provide them an optimum anaerobic growth condition. Thus, due to the absence of enough blood flow, penicillin does not cure tetanus.
Conclusion
Tetanus infections commonly occur following a puncture wound exposed to the C. tetani bacteria. Contamination of the wound often involves contact with soil, fecal matter, or rusty metal containing the causative pathogen.
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After you feel comfortable with your counting method and identifying cells in the various stages of mitosis, use the four images below of whitefish blastula to count the cells in each stage until you reach 100 total cells, recording your data below in Data Table 1. (You may not need to use all four images. Stop counting when you reach 100 total cells.)
After totaling the cells in each stage, calculate the percent of cells in each stage. (Divide total of stage by overall total of 100 and then multiply by 100 to obtain percentage.)
Data Table 1Stage Totals PercentInterphase Mitosis: Prophase Metaphase Anaphase Telophase Cytokinesis Totals 100 100%
To find the length of time whitefish blastula cells spend in each stage, multiply the percent (recorded as a decimal, in other words take the percent number and divide by 100) by 24 hours. (Example: If percent is 20%, then Time in Hours = .2 * 24 = 4.8) Record your data in Data…
Chapter 22 Solutions
Microbiology: An Introduction (13th Edition)
Ch. 22 - If Clostridium tetani is relatively sensitive to...Ch. 22 - Prob. 2RCh. 22 - Prob. 3RCh. 22 - Prob. 4RCh. 22 - Prob. 5RCh. 22 - Prob. 6RCh. 22 - Prob. 7RCh. 22 - Prob. 8RCh. 22 - Provide evidence that Creutzfeldt-Jakob disease is...Ch. 22 - NAME IT This organism causes meningitis and is...
Ch. 22 - Prob. 1MCQCh. 22 - Prob. 2MCQCh. 22 - Prob. 3MCQCh. 22 - Prob. 4MCQCh. 22 - Prob. 5MCQCh. 22 - Prob. 6MCQCh. 22 - Prob. 7MCQCh. 22 - Prob. 8MCQCh. 22 - Microscopic examination of cerebrospinal fluid...Ch. 22 - Prob. 10MCQCh. 22 - Prob. 1ACh. 22 - Prob. 2ACh. 22 - Prob. 1CAECh. 22 - Prob. 2CAECh. 22 - Prob. 3CAE
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