Thiospira spp. are microaerophilic and vigorously chemotactic with respect to oxygen and possibly H2S.
They are found in sulfurous marine and freshwater environ- ments, including wastewater treatment systems.
The validity of the genus Thiospira has, in recent years, been called into question. The primary diagnostic feature of the genus was the accumulation of sulfur within spiral cells, and the separation of the two species was primarily morphological. Now that some strains have been grown in axenic cultures, it seems likely