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The Journal of the Japanese Society for Clinical Microbiology |
Biblioraphy Information
| ArticleTitle |
A case of aspiration pneumonia suspected of involvement of Corynebacterium belfantii (formerly Corynebacterium diphtheriae biovar belfanti) |
| Language |
J |
| AuthorList |
Takeshi Shimomura1), Tomoko Matsunaga1), Yuichiro Uemura1), Kaede Uchida1), Noriko Iwasaki2) |
| Affiliation |
1) Department of Laboratory, Saiseikai Fukuoka General Hospital
2) Department of Internal Medicine, Saiseikai Fukuoka General Hospital |
| Publication |
J.J.C.M.: 33 (1), 52-57, 2022 |
| Received |
October 16, 2021 |
| Accepted |
July 26, 2022 |
| Abstract |
We experienced a case of suspected involvement of nontoxigenic Corynebacterium diphtheriae from sputum during treatment for aspiration pneumonia.
Even if a bacterium belonging to the genus Corynebacterium is detected in the sputum culture, it is treated as an indigenous bacterium in the oral cavity. But this time C. diphtheriae was detected significantly more than other indigenous bacteria in the oral cavity. If gram-positive rods of coryneform phagocytosed by leukocytes are significantly observed by smear microscopic examination of sputum and pharyngeal mucus, and characteristic colonies are detected in culture, the possibility of C. diphtheriae should be considered and an identification test should be performed.
The nitrate reduction ability was able to distinguish between biovar mitis and belfanti of C. diphtheriae, and the nitrate reduction test was negative, suggesting that it is highly possible that the C. diphtheriae biovar belfanti. In addition, since the C. diphtheriae biovar belfanti was proposed to be an independent species in 2018 and accepted as the official scientific name, the bacteria detected this time should have been expressed as C. belfantii instead of the C. diphtheriae biovar belfanti. |
| Keywords |
Corynebacterium diphtheriae, Corynebacterium belfantii |
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