Spirillaceae

A family of usually motile, aerobic to facultatively anaerobic bacteria (order Pseudomonadales) containing Gram-negative, rod-shaped cells which are curved or spirally twisted. Motile cells contain a single polar flagellum or a tuft of polar flagella. These organisms are primarily water forms, although some are parasitic or pathogenic on humans and other higher animals. The type genus is Spirillum. See Spirillum.

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Spi·ril·la·ce·ae .spī-rə-'lā-sē-.ē n pl in former classifications a family of phylogenetically heterogeneous bacteria including Spirillum, Campylobacter, Bdellovibrio, and associated genera, and comprising rigid more or less spirally curved elongate forms

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Spi·ril·la·ceae (spi″ril-aґse-e) a family of gram-negative, microaerophilic, motile, helical bacteria of the order Nitrosomonadales, occurring in stagnant freshwater environments. It contains a single genus, Spirillum.