BIOS 111 Study Guide - Midterm Guide: Tetanus Vaccine, Dental Caries, Clostridia

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8 Feb 2017
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BIOS 111 Unit 1 Exam Review Session Notes
Vegetative cells are just a typical growing bacteria (bacillus - think of one growing).
Once they stop growing, they convert to a different type of cell (differentiation)
When cells stop growing, they convert to a spore (survival structure)
Spores are the most resistant form of life known
Bacilli and Clostridia are spore-forming
Sporulation: formation of a spore
The spore doesn’t do anything; it’s a survival structure
Sporulation takes 6-8 hours
Spores can survive in high temperatures, high pressures,
radiation, etc.
They can only be killed by autoclaves
Autoclave: 121 degrees Celsius and high
pressure for 15 minutes
Germination occurs after years and takes 1-2 hours
There are 16 carbons and 18 carbons in fatty acid chains in bacteria
Site of the wound is where phenol goes (there are better options for surgery now, though)
A spore is viable if it can initiate growth or continue growing
As soon as they’re unable to reproduce, they are dead
Spores are alive and initiate germination and then growth
Spores are just survival structures; no metabolism (lowest in any living thing), so it
doesn’t carry out synthesis.
This means it can’t produce a toxin itself, but can germinate.
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