Rahnella

Abstract

Abstract Rah'nel.la. L. fem. dim. n. suff. ‐ella , diminutive ending; N.L. fem. dim. n. Rahnella , named after Otto Rahn, the German‐American microbiologist who proposed the name Enterobacteriaceae in 1937. Pseudomonadota / Gammaproteobacteria / Enterobacteriales / Enterobacteriaceae / Rahnella Rahnella species are ubiquitous in the environment, regularly isolated from water, soil, and woody tree hosts as well as occasionally from human clinical samples. Cells are Gram stain negative, facultatively anaerobic, and motile rods. Species are psychrotolerant, able to grow at 4°C, and favor growth temperatures of 25–30°C. Carbon sources such as d ‐maltose, N ‐acetyl‐ d ‐glucosamine, α‐ d ‐glucose, and d ‐mannose are readily assimilated. Species form a monophyletic clade when phylogenetic analysis is based on multilocus sequence analysis (MLSA) or whole‐genome sequences. The major fatty acids are C 16:0 and C 17:0 cyclo; the percentage of C 18:1 ω7 c , summed feature 2 (iso‐C 16:1 and/or C 14:0 3‐OH), and summed feature 3 (C 16:1 ω7 c and/or iso‐C 15:0 2‐OH) is variable, with some species exhibiting these fatty acids in larger amounts. DNA G + C content (mol%) : 51.3–53.7 (genome analysis). Type species : Rahnella aquatilis Izard et al. 1979, VL7.