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Major groups of bacteria


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  • 4 weeks later...

Hi,

 

This is a very general question.

 

There are many important bacterial genera - Neisseria; Yersinia; Escherichia; Klebsiella; Streptococcus; Staphylococcus; Salmonella; Shigella; Proteus; Chlamydia; Treponema; Leptospira; Clostridium; Bacillus; Brucella to name but a few.

 

Bacteria are often divided into two groups: Gram-positive and Gram-negative. These are 2 major groups.

 

Also, bacteria can also be named according to their shape:

- Streptococci are cocci arranged into chains

- Staphylococci are cocci arranged into grape-like clusters

 

Bacteria can also be subdivided as follows:

- obligate aerobes = if they use oxygen

- obligate anaerobes = if oxygen is toxic

- facultative anaerobes = if they use oxygen but can also survive without it

 

Hope this helps

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