Infraspecific bacteria taxa

GFAJ-1 is a strain of rod-shaped bacteria in the family Halomonadaceae. It is an extremophile that was isolated from the hypersaline and alkaline Mono Lake in eastern California by geobiologist Felisa Wolfe-Simon, a NASA research fellow in residence at the US Geological Survey. In a 2010 Science journal publication, the authors claimed that the microbe, when starved of phosphorus, is capable of substituting arsenic for a small percentage of its phosphorus to sustain its growth. Immediately after publication, other microbiologists and biochemists expressed doubt about this claim, which was robu

genetic variant, a subtype or a culture within a biological species

thumb|right|300px|Two serotypes 1a and 1b with antigens 2a and 2b on surface, which are recognized by two distinct [[antibodies, 3a and 3b, respectively]]

Serotype of the bacteria Escherichia coli

strains of the bacterium Escherichia coli

subtype of a microorganism. An organism with one or more new mutations is referred to as a “variant” of the original organism if not sufficiently different to be termed a distinct strain

thumb|Aeromonas veronii biovar sobria|Aeromonas veronii biovar sobria [[Gram stain on microscope slide]] A biovar is a variant prokaryotic strain that differs physiologically or biochemically from other strains in a particular species. Morphovars (or morphotypes) are those strains that differ morphologically. Serovars (or serotypes) are those strains that have antigenic properties that differ from other strains. __FORCETOC__

species of bacterium

tuberculosis that is resistant to standard drugs

strains of E. coli that can cause disease

species of bacterium