Background
Yokenella regensburgei, was firstly identified in 1984, belongs to Enterobacteriaceae [1]. Y. regensburgei is a gram-negative, periplasmic flagellated opportunistic pathogen that is ubiquitous in natural environments such as soil and water. Y. regensburgei and Hafnia alve share similar biochemical properties and thus might be misidentified as the latter by automated bacterial identification systems [2]. It commonly affects immunocompromised patients, such as patients acquired immunodeficiency syndrome and patients undergoing treatment with corticosteroids or immunosuppressors [3-4]. Here, we described the infection of Yokenella regensburgei in an immunocompetent patient.