A bacterium of the genus Pseudomonas in the family Pseudomonadaceae. Its name comes from the fact that green pus comes out when this bacterium causes a suppurative disease. It is a gram-negative rod-shaped bacterium, measuring 0.5-1.0 x 1.5-5.0 micrometers (1 micrometer is one millionth of a meter), and forms one or several flagella at one end. It does not form spores, is aerobic, and is oxidase positive. It grows well on nutrient agar (a general culture medium for bacteria) at 37°C. Pseudomonas aeruginosa produces water-soluble pigments, which color the medium. The colors vary from blue-green, reddish purple, brown, and fluorescent. Some bacteria do not produce pigments. Pseudomonas aeruginosa is a bacterium that is widely found in nature, but because it has low pathogenicity, it does not cause primary infections in healthy humans. However, once infection with this bacterium occurs, the condition can become serious because there are few effective treatments. [Masami Soneda] "Mitsuhashi Susumu et al., eds., "Basics and Clinical Practice of Pseudomonas aeruginosa Infections: The 3rd Toyama Symposium of the Infectious Diseases Research Society" (1993, Life Science Medica)" ▽ "Saito Atsushi and Yamaguchi Keizo, eds., "The Modern Significance of Pseudomonas aeruginosa: Its Tough Vitality and Pathogenicity" (1996, Medical Journal Co., Ltd.)" Source: Shogakukan Encyclopedia Nipponica About Encyclopedia Nipponica Information | Legend |
プセウドモナス(シュードモナス)科プセウドモナス属の細菌。名の由来は、本菌によって化膿(かのう)性疾患がおこった場合、緑色の膿汁が出ることによる。グラム陰性の桿菌(かんきん)で、大きさは0.5~1.0×1.5~5.0マイクロメートル(1マイクロメートルは100万分の1メートル)、一端に1本または数本の鞭毛(べんもう)を形成する。胞子は形成せず、好気性、オキシダーゼ陽性。培養の際は、普通寒天(一般細菌用培養基)37℃でよく発育する。緑膿菌は水溶性色素を生産するため、培地が着色する。色は青緑色、赤紫色、褐色、蛍光色などさまざまである。なかには色素を生産しないものもある。緑膿菌は自然界に広く存在する細菌であるが、病原性が弱いので、健康なヒトには原発性の感染をおこすことはない。しかし、一度本菌で感染がおきた場合は特効的治療剤が少ないため、重篤となることがある。 [曽根田正己] 『三橋進他編『緑膿菌感染症の基礎と臨床 感染症研究会「第3回富山シンポジウム」』(1993・ライフサイエンス・メディカ)』▽『斎藤厚・山口恵三編『緑膿菌の今日的意味――したたかな生命力とその病原性』(1996・医薬ジャーナル社)』 出典 小学館 日本大百科全書(ニッポニカ)日本大百科全書(ニッポニカ)について 情報 | 凡例 |
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