Environmental Microbiology

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created 3 years ago by Whitneyn17
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1

Winogradsky

  • First person to isolate nitrogen-fixing bacteria
    • Microbiologia de
2

Beijerinck

  • Began studying microbes on plants
  • Root nodules contain nitrogen-fixing bacteria (symbiotic relationship)
  • Established field of microbial biology
3

E. coli

Escherichia coli

4

Koch's Pustulates

1. Organism must be found in all

2. Isolate organism from individual in pure culture

3. Infect healthy individual and produces the same symptoms of disease

4. Reisolate organisms

5

Cell wall

(Animals, plants/algae, bacteria?)

Protection (from lysis)

Animals: NONE

Plants/Algae: Cellulose

Fungi: Chitin

Bacteria: Peptidoglycan

6

Cell membrane

Transport

7

Mycoplasma

Present in all prokaryotes

8

Peptidoglycan

  • N-acetylglucosamine (G)
  • N-acetylmuramic acid (M)
  • Peptide bridge
9
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Gram + Organisms

  • Up to 90% of wall is peptidoglycan
  • Up to 50% is teichoic acid
10

Teichoic Acid

  • Carbon backbone (D-Alanine)
  • 2 - phosphates
11
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Identify structure and function of each

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Gram +

12

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