yaws /yôs/ [Afr, yaw, raspberry,] , a chronic bacterial infectious disease caused by Treponema pallidum subspecies pertenue. The World Health Organization identifies two stages of the disease: early (infectious) and late (noninfectious). Also called bouba, buba, frambesia, framboesia, parangi, patek, pian. Compare bejel, pinta, syphilis. ▪ OBSERVATIONS: Yaws is characterized by chronic ulcerating sores anywhere on the body but usually on the legs. The initial lesion, the mother yaw, occurs at the point of entry for the bacteria. The sores associated with yaws are yellowish or reddish and in shape and appearance often resemble currants, strawberries, or raspberries. In the late stage, bone, joint, and soft tissue deformities may occur. Lesions are not contagious at this point. Serologic tests confirm the diagnosis of yaws. ▪ INTERVENTIONS: A single oral dose of the antibiotic azithromycin can completely cure yaws. An intramuscular injection of penicillin G can also be used in treatment. ▪ PATIENT CARE CONSIDERATIONS: Without treatment, infection can lead to chronic disfigurement and disability. Eradication efforts in countries where yaws remains an endemic disease are ongoing. Overcrowding, poor hygiene, and socioeconomic factors contribute to the persistence of this disease.
