Species within the genus Stenotrophomonas are multidrug resistant opportunistic pathogens that are responsible for nosocomial infections in immunodeficient patients.
The division was in accordance with CSIs that were found specifically for all members of the emended Xanthomonadales order, providing support for the currently accepted taxonomy.
All other species were transferred to Nevskiales, which did not share CSIs with Xanthomonadales, but remain close relatives within the Gammaproteobacteria.
[10] Cardiobacteriales, Chromatiales, Methylococcales, Legionellales and Thiotrichales are also deep branching orders that are phylogenetic neighbours of Xanthomonadales and Nevskiales members.
[10][13] The order Nevskiales harbors a single family (Salinisphaeraceae) and six genera: Alkanibacter, Fontimonas, Hydrocarboniphaga, Nevskia, Solimonas and Steroidobacter.