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BACTERIOLOGY INFO

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					                                  MICROBIOLOGY
                                      (SECONDARY)

                           ESSENTIAL OUTCOME 4(E04)

              (IDENTIFYING CHARACTERISTICS OF BACTERIA)

KINGDOM MONERA, PHYLUM SCHIZOPHYTA

CLASS

Eubacteria    Rickettsia     Actinomycota     Spirochetae

three forms   indefinite     'ray-fungus'   helical

facultative obligate        facultative   facultative
parasitic   parasitic      parasitic    parasitic

some motile    nonmotile       nonmotile      motile


Eubacteria are the largest group in the Bergey classification comprising 29 of the 33
sections. This includes the smallest bactreria, the mycoplasmas, and the enterics,
which are intestinal bacteria. The three forms are spirillum, bacillus and coccus. The
metabolic range from anaerobe to aerobe is complete. These are the most common
bacteria.

Rickettsia are small, parasitic bacteria which are very similar to viruses except that
they have cell walls and their own DNA and RNA. They lack enzymes which they
must obtain from host cells. (section 9 of Bergey)

Actinomycota are fungal shapes bacteria which have branched filaments. They are
often soil bacteria which oxidize molecular nitrogen for plants. Some are found in
tooth cavities but they are largely nonparasitic. (sections 15 and 27 of Bergey)

Spirochetae are spiral, helical shaped bacteria which often have axial filaments
running their entire lengths intrnally. They also have a sheath or coating over the
exterior surface. (section 1 of Bergey)

				
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