1. 16 Rat-bite fever is an acute febrile illness caused by two different organisms, Streptobacillus moniliformis and Spirillum minus.

2. Spirillum desulfuricans, now known as Desulfovibrio desulfuricans, the first known sulfate-reducing bacterium, was isolated and described by Beijerinck.

3. 28 Any of various aerobic bacteria of the genus Spirillum, having an elongated spiral form and bearing a tuft of flagella.