1. The globe
    a. Atmosphere
    b. Terrestrial
    c. Aquatic

2. The normal flora of the human body
    a. Oral cavity
    b. Gastrointestinal tract
    c.  Skin

3. The normal flora of the rumen

Earth is an exceptionally complex ecosystem with 3 major recogonisable habitats:
    1. Atmosphere (air) - aeromicrobiology
    2. Terrestrial (land) - soil microbiologist
    3. Aquatic (water)   - water (wastewater) microbiology

a. Atmosphere as a habitat

b. Terrestrial habitat  
Chestnut Soil (Temperature climate) 
 Podzolic Soil (Timberland climate)
 High organic content  Low organic content
 Neutral pH  Highly Acidic pH
 High microbial numbers  Low microbial numbers
 Numerous bacteria  Fungi numerous 
  c. Aquatic habitats
a. The flora of the oral cavity b. Gastrointestinal Microbes
GI consists of three parts, namely Stomach, Small intestine (duodenum, jejunum, ileum) and large intestine.

(i) Stomach

Helicobacter pylori causes gastric and duodenal ulcers:                         C=0(NH2)2 + H+ +2H2--urease--> HCO3- + 2(NH4) If you want more details than there are two very useful sites on the web.
Click here to go to Helicobacter foundation which deals with the disease or click here to go to Microbial Genomes. A full description of the genome organization has been published by Tomb et.al., in Nature 388: 539-547, 1997

Suggestions and Comments to: Professor Bharat Patel b.patel@griffith.edu.au

[Created: 17 Aug 1997]
[Modified: 13 March 2006]