The Lancet has published a new study led by Oriol Mitjà, first author and researcher at the Barcelona Institute for Global Health (ISGlobal), a centre supported by the “la Caixa” Foundation,...

This disfiguring tropical disease is caused by the spirochete, Treponema pertenue. This species is morphologically indistinguishable from the agent of venereal syphilis, Treponema pallidum. Yaws is predominately...