Chapter 44

Endemic Treponematoses

Yaws, Pinta and Endemic Syphilis

Herman Jan H. Engelkens

Herman Jan H. Engelkens

Department of Dermatology and Venereology, Ikazia Hospital, Rotterdam, The Netherlands

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First published: 20 November 2019

Summary

The treponemal infections that occur in humans are venereal syphilis and the endemic treponematoses (yaws, endemic syphilis and pinta). The endemic treponematoses, all of which are chronic relapsing tropical diseases, have similar natural histories. Young children are at the highest risk of acquiring these nonvenereal treponematoses. Nearly all of the new cases are found in children less than 15 years of age. As a result of United Nations Children's Emergency Fund (UNICEF) and World Health Organization (WHO) supported mass treatment campaigns in the 1950s and 1960s, the incidence of the endemic treponematoses has been greatly reduced. However, these diseases have not been eradicated. Latent cases are still prevalent and millions of people continue to be at risk of acquiring the endemic treponematoses from individuals with relapsing disease.

In 2012, WHO launched a new initiative for the eradication of yaws by 2020.

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