A case of mesenteric lymphadenitis with bacteremia caused by Salmonella Gabon and Yersinia enterocolitica

Abstract

We report here a case of mesenteric lymphadenitis with bacteremia caused by Salmonella Gabon and Yersinia enterocolitica. A 16-year-old male patient was admitted with fever and abdominal pain associated with mesenteric lymphadenitis. Fluid therapy with oral clarithromycin (CAM) was started. However, since his abdominal pain and fever persisted, oral administration of CAM was switched to that of levofloxacin (LVFX). Two types of Gram-negative bacilli were detected from culture of blood collected on admission. Biochemical analysis of the isolates demonstrated Salmonella sp. and Yersinia enterocolitica. Salmonella sp. was identified as Salmonella enterica subsp. enterica serovar Gabon (O7: l, w: 1, 2) by an immunoserological test. As it is difficult to detect Y. enterocolitica at 35°C, it is necessary to culture it at 25°C. In this case, it was possible to detect these bacteria by both adding a selective medium and changing the incubation temperature according to clinical information. When samples are subjected to a bacterial isolation test, it is important for both physicians and clinical microbiologists to share the information of patients and organisms causing the diseases.