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Chapter 11
Domains Bacteria and Archaea
9
Microbiology
Undergraduate 1
02/28/2011

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Term
alphaproteobacteria
Definition
obligate pathogens, several soil bacteria, plant pathogesn, nitrifying (use ammonia to get N2) nd nitrogen fixers and insect symbionts; have prosthecae (appendage coming off) and bacteria with cycles similar to eukaryotes
Term
betaproteobacteria
Definition
important human and animal pathogens, important soil and water microbes
Term
gammaproteobacteria
Definition
important human pathogens, vibrionales (found in coastal water) and enterbacteriales (facultatively anaerobic)
Term
deltaproteobacteria
Definition
prey on other bacteria
Term
epsilonproteobacteria
Definition
include helicobacters (most important multiple flagella and cause peptic ulcers) other human pathogens
Term
proteobacteria
Definition
gram-negative and include alpha beta gamma delta and epsilon
Term
fermicutes
Definition
low G + C content; several human pathogens; spore forming; Ex Clostridium are endospore-producing obligate aerobes; gernally aerotolerant anaerobes; lack an electron-transport chain)
Term
actinobacteria
Definition
high G + C content; include mycobacteria (human pathogen) and cornybacteria (diptheria causeing pathogen)
Term
archaea
Definition
extreme halophiles, thermophiles and methanogens are included
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