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Bacteria (/bækˈtɪəriə/ ; sg.: bacterium) are ubiquitous,
mostly free-living
organisms often consisting of one
biological cell. They
constitute a large...
- Gram-negative
bacteria are
bacteria that,
unlike gram-positive
bacteria, do not
retain the
crystal violet stain used in the Gram
staining method of bacterial...
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Coliform bacteria are
defined as
either motile or non-motile Gram-negative non-spore
forming bacilli that
possess β-galactosidase to
produce acids and...
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Pathogenic bacteria are
bacteria that can
cause disease. This
article focuses on the
bacteria that are
pathogenic to humans. Most
species of
bacteria are harmless...
- Gram-positive
bacteria are
bacteria that give a
positive result in the Gram
stain test,
which is
traditionally used to
quickly classify bacteria into two broad...
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Denitrifying bacteria are a
diverse group of
bacteria that encomp**** many
different phyla. This
group of
bacteria,
together with
denitrifying fungi and...
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Purple bacteria or
purple photosynthetic bacteria are Gram-negative
proteobacteria that are phototrophic,
capable of
producing their own food via photosynthesis...
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Nitrifying bacteria are
chemolithotrophic organisms that
include species of
genera such as Nitrosomonas, Nitrosococcus, Nitrobacter, Nitrospina, Nitrospira...
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Bioluminescent bacteria are light-producing
bacteria that are
predominantly present in sea water,
marine sediments, the
surface of
decomposing fish and...
- infections. This
resistance affects all
classes of microbes,
including bacteria (antibiotic resistance),
viruses (antiviral resistance),
parasites (antiparasitic...
