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Summary Microbes: Intro to Microbiology

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Comprehensive review and outline of unit 1 information from in-class lectures.

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January 16, 2025
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Written in
2024/2025
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Intro to Microbiology
Y microbe - cellular microorganisms (bacteria, archaea, fungi, protists, helminths) and noncellular entities (viruses
and prions)

> germ theory - microbes cause infectious diseases
• spontaneous generation - life generates from non-living items
• biogenesis - life generates from life

& Ignaz Semmelweis - infection control for delivering mothers
• physicians and med students transmitting puerperal fever
- work on corpses, no hand hygiene
> Koch's postulates
1 organism present in every case of disease, not in healthy individuals
2 organism isolated from diseased host and grown
3 isolate organism should cause disease in susceptible host
4 re-isolated from diseased animal

>
-

human microbiome - some are transient
• GI microbes
- help prevent infections
- aid in food breakdown
- provide essential nutrients and vitamins


> microcsopy - uses radiation source to magnify objects
• smaller the wavelength, higher the resolution - organism must be smaller than wavelength to be seen
• contrast - increased by staining organism and background
R138,06
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