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The Journal of the Japanese Society for Clinical Microbiology |
Biblioraphy Information
| ArticleTitle |
A Case of Nonhemolytic Streptococcus pyogenes Isolated from a Patient with Cholesteatoma |
| Language |
J |
| AuthorList |
Miki Takahashi, Sachie Yomoda, Masami Murakami |
| Affiliation |
Department of Clinical Laboratory Center, Gunma University Hospital,
3-39-15 Showa-machi, Maebashi, Gunma 371-8511, Japan |
| Publication |
J.J.C.M.: 21 (1), 40-44, 2011 |
| Received |
December 28, 2009 |
| Accepted |
December 22, 2010 |
| Abstract |
The case is an eleven year old Japanese boy. He visited a doctor for the hearing disturbance and the effusion of the left ear. He was diagnosed to have a chronic otitis media with the cholesteatoma and refered to the department of otolaryngology of Gunma University Hospital. Streptococcus pyogenes and methicillin-resistant Staphylococcus aureus (MRSA) were isolated from the effusion of the ear. The colony of S. pyogenes showed beta hemolysis as the typical findings of the bacteria. At the hospitalization, non-hemolytic S. pyogenes was isolated from the effusion of the tympanum as well as the bacteria that belong to the same strains isolated before. A colony of nonhemolytic Streptococcus pyogenes appeared white, and looked like a big Enterococcus-like colony in a mucoid state in the blood agar. Autolysis was evident and looked like a Streptococcus pneumoniae colony in a mucoid state in the chocolate agar. In this case, we could identify nonhemolytic S. pyogenes from aseptic part of middle ear. It is necessary to pay attention to the possibility of nonhemolytic S. pyogenes in performing routine laboratory examinations. |
| Keywords |
Streptococcus pyogenes, nonhemolytic, otitis media |
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