Borrelia burgdorferi, the bacterium that causes Lyme, lives in the bodies of deer and white footed mice, passing between those animals in the heads of biting ticks.

• 莱姆病的致病菌伯氏舒螺旋体寄生在鹿和白爪鼠体内,通过吸血虱的头部在这类动物当中传播。