You and your oral flora

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You and your oral microflora

A module in seven parts…

Overall learning objectives

-why are we doing this?

At the end of this module, you will be able to do the following: describe (some of) the microbes that live in and on the human body.

explain the roles that microbes play in both human and health and disease, in particular the role that microbes play in immunity differentiate between DNA replication as it occurs within a cell and as it occurs inside of a test tube.

navigate sources of information about microorganisms and be able to discriminate between accurate and inaccurate sources.

Learning objectives for today…

You will be able to describe (some of) the microbes that lie in and on the human body

Just to become comfortable working and thinking about microbes

Find a background image of bacteria adhering to a surface for this slide; good source: Science Photo Library or the ASM Microbe Library

What Are Microbes?

Types of microbes

Find a good Electron micrograph image of each category here…

Could also use this opportunity to get student responses for examples of each

Prokaryotes

Bacteria

Archaea

Eukaryotes

Fungi

Protists

Green Algae

Viruses

There are LOTS of microorganisms

Insert fun cartoon

of bacteria here

(e.g. search for

“The fantastic

world of

Microbiology”)

Number of galaxies: ~ 350 billion

Stars in the Milky Way: 200-400 billion

US National Debt: 15.9 trillion (as of

8/2012)

Cells in the human body: 50-75 trillion

Number of visible stars: 10

22

Number of Microorganisms: 10

31

99% of microorganisms are uncharacterized!

Yes, microbes cause disease…

Insert pie chart of

Infectious Disease

Deaths

Worldwide…good sources include CDC or

WHO, but others also useful

http://www.who.int/mediacentre/fac tsheets/fs310/en/

http://www.childinfo.org/mortality_u nderfive.php

Second leading cause of death worldwide

Dental plaque is the most widespread

Tuberculosis affects 1/3 of world

A child dies of malaria every minute!

(some estimate 1 every

30 seconds)

…but most microbes are BENEFICIAL!

Help their hosts

Insert image of intestines here

Maintain ecosystems

Insert lovely landscape

Alter climate

Insert storm image here

Aid digestion

Make vitamins

Detoxify chemicals

Develop the immune system

Fight off invaders

Cycle nutrients

Cycle metals

Decompose

Fix O

2

, CO

2

N

2 and

Food source

Bioremediation

Seed clouds

Nucleate ice crystals

Produce O

2

Sequester CO

2

To the module!

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