梅毒密螺旋体(Treponema pallidum)又叫苍白密螺旋体。菌体为纤细的螺旋形长丝,两端尖直,螺旋较整齐规则。一般长6-20μm,宽0.09-0.18μm。运动较缓慢。用姬姆萨氏或瑞特氏染液长时间染色,呈浅红色。若用镀银染色法,则呈棕黑色。寄生性较强,不易人工培养。在体外,生活力很弱,易被普通消毒剂杀死。对砷、鉍、汞等化学制剂很敏感;青霉素、四环素、庆大霉素等则有强大杀灭作用。加热到41.5℃一小时即可杀死,在0-4℃环境中只能生存48-72小时。实验室内常以家兔睾丸或眼前房保存菌种。在自然情况下,梅毒密螺旋体仅侵犯人体,引起梅毒。梅毒是一种性传播疾病,主要 Treponema pallidum is also called Treponema pallidum. Cells for thin spiral filament, pointed sharp at both ends, spiral more regular rules. Generally 6-20μm long, 0.09-0.18μm wide. Slower movement. Stained lightly for a long time with Giemsa or Reiter’s stain, light red. If silver staining, it was brown. Parasitic stronger, not easy to artificial training. In vitro, vitality is weak, easily killed by ordinary disinfectants. Right arsenic, bismuth, mercury and other chemical agents are very sensitive; penicillin, tetracycline, gentamicin and so have a strong killing effect. Heating to 41.5 ℃ an hour to kill, in the 0-4 ℃ environment can only survive 48-72 hours. Laboratory usually rabbit testes or anterior chamber save bacteria. In nature, treponema pallidum invades the body and causes syphilis. Syphilis is a sexually transmitted disease, mainly