Correct spelling for yaws

Medical definition of yaws:

Frambesia, pian, an infectious disease of the tropics, marked by febrile disturbances, rheumatic pains, and an eruption of aggregated rounded or flattened tubercles capped with a caseous crust; the specific organism is believed to be Treponema pertenue ( Spirochoeta pertenuis).

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A method of diagnosis of pregnancy: with the tip of the forefinger in the vagina, a sharp tap is made against the lower segment of the uterus; the embryo, if present, is tossed upward, and if the finger is retained in place will presently be felt to strike against the wall of the uterus as it falls back. ...