The knowledge of parasitic fauna in wild animals is essential for understanding the ecological conditions that determine the occurrence and prevalence of parasites in their hosts. With the exception of records of one Pentastomida (Cephalobaena tetrapoda Heymons, 1922) and two Nematoda (Physaloptera sp. And Aspiculuris sp.), detailed information about the helminth fauna associated with the jararaca Bothrops erythromelas Amaral, 1923 is lacking. This species has a wide distribution in the Caatinga, with records in marginal areas of the Cerrado and Atlantic Forest. Here, we describe the patterns of richness, abundance, and prevalence of helminths in B. erythromelas, a venomous snake from northeastern Brazil. The parasitized snakes were collected from six Brazilian states in the Northeast region: Bahia, Ceará, Paraíba, Pernambuco, Piauí, and Rio Grande do Norte. We examined the gastrointe...