A rare pathogen causing pulmonary infection and liver dysfunction in a 46-day-old infant: Rhizobium radiobacter.

Rhizobium radiobacter is an aerobic, motile, oxidase-positive, non-spore-forming Gram-negative tumorigenic plant pathogen which rarely infects humans. A 46-day-old girl was admitted to hospital with a 10-day history of fever and cough. She had pneumonia and liver dysfunction owing to infection by R. radiobacter. After 3 days of treatment with ceftriaxone, (compound glycyrrhizin and ambroxol), her body temperature returned to normal and the pneumonia improved, but liver enzyme levels continued to rise. After treatment with meropenem (glycyrrhizin and reduced glutathione), her condition stabilised and she recovered with no liver damage, and was discharged after 15 days. R. radiobacter has low virulence and antibiotics are highly sensitive, but, rarely, severe organ dysfunction can occur and result in multi-system damage in vulnerable children.