Abstract
We encountered a case of bloodstream infection caused by Anaerobiospirillum succiniciproducens. The patient was an 80-year-old male who visited our hospital because of fever and inappetence. He had also experienced symptoms of sore throat and cough since he started to have his dog indoors. Upon observing an infiltrative shadow in the right inferior lobe of his lung by chest X-ray and chest computed tomography (CT), he was diagnosed as having pneumonia and admitted to the hospital. The blood culture obtained at the time of admission grew anaerobic spiral-shaped gram-negative bacillus cells, which were identified as A. succiniciproducens by 16S rRNA gene sequencing. He already had started treatment with sulbactam/ampicillin (SBT/ABPC) for bacterial pneumonia since the time of admission. Therefore, we did not change the antibiotics but extended the duration for the treatment of bloodstream infection based on the gram staining result of his blood culture. After the completion of the antibiotic treatment and the recovery of his general condition, he was discharged. Although there are only a few cases of bloodstream infection by A. succiniciproducens, it is still important to have collective knowledge on the process of pathogen identification and treatment outcomes.
