Genus I Acidithiobacillus Kelly and Wood 2000 513VP

Donovan P. Kelly and Ann P Wood'lus. L. adj. acidus sour; Gr. n. thios sulfur; L. n. bacillus a small rod; M.L. masc. n. Thiobacillus small acid-loving sulfur rod.

Obligately acidophilic, aerobic, Gram-negative rods, 0.4 X 2.0 |im, motile by one or more flagella. Optimum growth below pH 4.0, using reduced sulfur compounds to support autotrophic growth. Some species oxidize ferrous iron or use natural and synthetic metal sulfides for energy generation; some species oxidize hydrogen. Optimum temperature 30-35°C for mesophilic species and 45°C for moderately thermophilic species. Contain ubiquinone Q-8. Member of the Gammaproteobacteria.

Type species: Acidithiobacillus thiooxidans (Waksman and Joffe 1922) Kelly and Wood 2000, 513 (Thiobacillus thiooxidans Waksman and Joffe 1922, 239.)

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