Any of various irregularly coiled helical spirochetes of the genus Borrelia, some species of which cause relapsing fever in humans, other mammals, and birds.
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- 包柔氏螺旋体属一种包柔氏螺旋体属螺旋不规则的螺旋体,其中一些会引起人类、其他哺乳动物和鸟类的回归热病