Comamonas testosteroni, previously known as Pseudomonas testosteroni, is a gram-negative, aerobic, motile, pink-pigmented, oxidase-positive bacilli. It rarely infects humans and commonly lives in environments such as soil, water, plants, and animals; however, it also survives for a long time in hospital environments. C. testosteroni infections are often treated in humans, and thus, mortality is rare. To date, among 19 cases of C. testosteroni bacteremia in the literature, only four died owing to underlying diseases. Here we present a case of a 68-year-old male patient with underlying pulmonary malignancy who was positive for C. testosteroni and Staphylococcus haemolyticus in the blood culture and Acinetobacter baumannii in the tracheal aspirate culture. The patient died on the 16th day, despite appropriate treatments against etiological agents. The patient is the 20th bacteremia and fifth mortal case among 38 cases with C. testosteroni infection in the medical literature.
Corresponding Author: Yasayancan N.