Tatumella

Abstract

Ta.tum.el' la . M.L. dim. neut. ‐ ella ending; M.L. fem. n. Tatumella named to honor Harvey Tatum, an American bacteriologist who made many contributions to our understanding of the classification and identification of fermentative and nonfermentative bacteria of medical importance. Proteobacteria / Gammaproteobacteria / Enterobacteriales / Enterobacteriaceae / Tatumella Small rod‐shaped cells 0.6–0.8 × 0.9–3 μm , conforming to the general definition of the family Enterobacteriaceae . Contains the enterobacterial common antigen. Gram negative. Nonmotile at 36°C; over half the strains are motile by means of polar, subpolar, or lateral flagella when grown at 25°C . Facultatively anaerobic. Catalase positive (weak and slow). Oxidase negative. Nonpigmented. Stock cultures often die within a few weeks on laboratory media. Biochemically more active at 25°C than at 36°C . Ferment, rather than oxidize, D ‐glucose; without the formation of visible gas. Reduce nitrate to nitrite. Very inactive biochemically; positive tests only for Voges—Proskauer ( Coblentz method ), phenylalanine deaminase, and fermentation of sucrose, trehalose, and D ‐mannose. Negative for most tests : indole production, methyl red, Voges—Proskauer (O'Meara method), citrate utilization (Simmons), H 2 S production (TSI), urea hydrolysis, lysine decarboxylase, arginine dihydrolase, ornithine decarboxylase, growth in the presence of cyanide (KCN test), malonate utilization, esculin hydrolysis, ONPG, gelatin hydrolysis (22°C), lipase (corn oil), DNase, gas production during fermentation, and the fermentation of lactose, D ‐mannitol, dulcitol, adonitol, myo ‐inositol, D ‐sorbitol, L ‐arabinose, raffinose, L ‐rhamnose, maltose, D ‐xylose, cellobiose, α‐methyl‐ D ‐glucoside, erythritol, D ‐arabitol, glycerol, and mucate. Have very large zones of inhibition around antibiotics; susceptible to colistin, nalidixic acid, sulfadiazine, gentamicin, streptomycin, kanamycin, tetracycline, chloramphenicol, carbenicillin, ampicillin, and cephalothin (disk diffusion method on Mueller–Hinton agar). Large zone of inhibition around a penicillin G (10 U) disk, in contrast to most other Enterobacteriaceae . The mol % G + C of the DNA is : 53–54. Type species : Tatumella ptyseos Hollis, Hickman and Fanning 1982, 267 (Effective publication: Hollis, Hickman, Fanning, Farmer, Weaver and Brenner 1981, 86.)