Yaws is transmitted by

· Direct contact: That is by contact with secretions from infectious lesions.

· Fomites: Yaws may also be transmitted by indirect contact . The organism may remain alive on fomites or on the earthen floor in hot and humid conditions long enough to cause infection.

· Vector: There is some evidence that small flies and other insects feeding on the lesion may possibly convey the infection mechanically for brief periods. Transplacental, congenital transmission does not occur