2. Many spirochetes are pathogens cause yaws and syphilis.
许多螺旋体是病原体，会导致雅司病（热带肉芽肿）、梅毒。
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3. Yaws is transmitted mainly through direct skin contact with an infected person.
雅司病主要通过与受感染者的直接皮肤接触进行传播；
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4. Many spirochetes are pathogens causing yaws, syphilis, and relapsing fever.
许多螺旋体是病原体，会导致雅司病、梅毒、以及回归热等。
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5. The causative organism is a bacterium called Treponema pertenue, a subspecies of Treponema pallidum that causes venereal syphilis. However, yaws is a non-venereal infection.
致病微生物是一种被称作雅司螺旋体的细菌，它是引起性病梅毒的梅毒螺旋体的一个亚种。
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6. There is no specific blood test for yaws, but because it is closely related to the bacterium that causes syphilis, the blood tests for syphilis are diagnostic in yaws as well.
7. There is no specific blood test for yaws, but because it is closely related to the bacterium that causes syphilis, the blood tests for syphilis are diagnostic in yaws as well.
