Psychrobacter cryohalolentis is a Gram-negative, nonmotile species of bacteria. It was first isolated from Siberian permafrost. Its type strain is K5<sup>T</sup> (=DSM 17306<sup>T</sup> =VKM B-2378<sup>T</sup>).
Hypoacylated lipopolysaccharide (LPS) from P. cryohalolentis induces moderate TLR4-mediated inflammatory response in macrophages and such LPS bioactivity may potentially result in the failure of local and systemic bacterial clearance in patients.