Definition: A genus of motile, peritrichous, aerobic to facultatively anaerobic bacteria (family Enterobacteriaceae) that contains small, gram-negative rods. Some strains are encapsulated. Many strains produce a pink, red, or magenta pigment; their metabolism is fermentative and they are saprophytic on decaying plant and animal materials. The type species is Serratia marcescens.
[Serafino Serrati, 18th-century Italian physicist]
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Examples: glitazone, GI cocktail, etc.