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- Taiki Okumura, Keisuke Soya, Yu Hihara, Shinji Muraoka, Yoshihiro Nishimura, Katsuaki Inoue, Atsushi Maruyama, and Go Matsumoto.
- Department of Gastroenterology, Ina Central Hospital, Japan.
- Intern. Med. 2020 Jun 1; 59 (11): 1451-1455.
AbstractA 48-year-old man presented with a sustained fever. Abdominal computed tomography revealed multilocular liver abscesses. He underwent percutaneous needle aspiration, yielding straw-colored pus. Gram staining revealed Gram-negative coccobacilli. The organism grew only on chocolate II agar in a 7% carbon dioxide atmosphere. Identification of Aggregatibacter aphrophilus was confirmed using mass spectrometry and 16S rRNA gene sequencing. He was successfully treated with antibiotics. Liver abscess caused by A. aphrophilus is extremely rare. We herein report the first such case in Japan. Even fastidious organisms, such as A. aphrophilus, should be correctly identified using mass spectrometry or 16S rRNA gene sequencing for adequate treatment.
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