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I.緒言
Mycoplasma pneumoniaeは上気道炎,気管炎,気管支炎,また異型肺炎等,種々のヒト呼吸器疾患の原因となっている。
耳鼻科領域において,M. pneumoniaeは鼓膜炎,急性中耳炎3)や急性咽頭炎4)等から分離されることがある。また風邪症候の原因菌の数パーセントにM. pneumoniaeがあるといわれている4)。急性副鼻腔炎あるいは慢性副鼻腔炎急性増悪患者ではM. pneumoniaeの分離例はないが,われわれ耳鼻科診療上,風邪罹患患者においてしばしば急性副鼻腔炎や慢性副鼻腔炎急性増悪例を経験する。これらのことは急性副鼻腔炎あるいは慢性副鼻腔炎急性増悪の原因にM. pneumoniaeが関与する症例がありうることを示唆している。
M. pneumoniae organisms were infected into hamster by inhalation of aerosol in oder to observe colonization of the organisms in the nasal cavity, oral cavity, nasal septum, trachea and lungs, and also to observe histopathological changes in the nasal septum, trachea and lungs. M. pneumoniae was recovered 60% from the nasal cavity, especially 80% from the nasal septum at 2 weeks after infection. At the same time, the pathological changes were recognized in 20% of the nasal septum samples. Histopathologic changes were not found in any of control tissue samples obtained from non-infected hamsters. The findings that M. pneumoniae attached to nasal mucosa and produced pathological changes suggest that the organisms might contribute to the formation of sinusitis and exacerbation of chronic sinusitis in human.
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