Phylum Proteobacteria, Class Gammaproteobacteria, Order Enterobacteriales, Family Morganellaceae, Genus Xenorhabdus,
Xenorhabdus innexi Lengyel et al. 2005.
Species description is based on a single isolate.
Gram-negative rods, 3.0-3.1 x 0.75 µm.
Colonies on nutrient agar are circular, convex, undulate, granular, and yellowish,
3.0-3.5 mm in diameter; on NBTA colonies are red. Maximum growth temperature: 36
ºC in NB and 41 ºC in TSB.
Isolated from Steinernema scapterisci, Uruguay.
- Lengyel K, Lang E, Fodor A, Szallas E, Schumann P, Stackebrandt E. Description of four novel species of Xenorhabdus, family
Enterobacteriaceae: Xenorhabdus budapestensis sp. nov., Xenorhabdus ehlersii sp. nov., Xenorhabdus innexi sp. nov., and
Xenorhabdus szentirmaii sp. nov. Syst Appl Microbiol 2005; 28:115-122.
- Tailliez P, Pages S, Ginibre N, Boemare N. New insight into diversity in the genus Xenorhabdus, including the description of ten
novel species. Int J Syst Evol Microbiol 2006; 56:2805-2818.
Positive results for DNAse, esculin hydrolysis, gelatin hydrolysis, indole production, lecithinase and Tween 20, 40, 60 and 80
hydrolysis, acid production from fructose, glucose, gluconate, glycerol, mannose, N-acetylglucosamine, and ribose.
Can utilize (API 20 NE) glycerol, glucose, mannose, N-acetylglucosamine, maltose, ribose, fructose, trehalose, gluconate, esculin,
malate, and citrate. No utilization of inositol.
Can utilize (Biolog GN) Tween 80, N-acetyl-D-glucosamine, D-fructose, D-mannose, psicose, mono-methyl succinate, D-gluconic
acid, D,L lactic acid, bromo-succinic acid, alanin-amide, L-alanyl-glycine, L-alanine, glycyl-L-aspartic acid, glycyl-L-glutamic acid, L-
histidine, L-proline, D-serine, uridine, thymidine, glucose-1-phosphate, dextrin, alpha-D-glucose, D-trehalose, methyl-pyruvate,
succinic acid, L-aspartic acid, L-asparagine, L-glutamic acid, L-serine, glycerol, DL-alpha-glycerol phosphate, inosine and glucose-6-
phosphate. All the other Biolog GN tests are negative.
Negative results for nitrate reduction, starch hydrolysis, phenylalanine deaminase, phosphatase, acid production from esculin,
inositol and maltose. According to the API 50CH kit the majority of fermentation tests were negative and they were therefore not
shown in the original paper.
Variable results for citrate utilization, acid production from inositol, 5-ketogluconate and trehalose.
Variable assimilation of ribose, cis-aconitate, citrate, histidine, and D-glucosamine.
(c) Costin Stoica