Parasitismo de Ornithodoros (Ixodida:Argasidae) em Thoropa (Anuro:Cycloramphidae) no Brasil

Detalhes bibliográficos
Autor(a) principal: Faria, Iwine Joyce Barbosa de S? Hungaro
Data de Publicação: 2017
Tipo de documento: Tese
Idioma: por
Título da fonte: Biblioteca Digital de Teses e Dissertações da UFRRJ
Texto Completo: https://tede.ufrrj.br/jspui/handle/jspui/2545
Resumo: Argasidae parasitism in amphibians was recently observed in Brazil, and this register occurred with the description of Ornithodoros faccinii Barros-Battesti, Landulfo & Luz, 2015, parasitizing Thoropa miliaris (Spix, 1824), amphibian of the family Cycloramphidae in the municipality of Itagua? , Rio de Janeiro state. The genus Thoropa is endemic in the Atlantic Forest and has five species besides T. miliaris: T. taophora, T. megatympanum, T. saxatilis, T. lutzi and T. petropolitana. These, within their particularities, have geographical distribution in the southern states of the country to the south of Bahia. After observations that ticks remained in the hosts even after the procedures for depositing them in scientific collections, and the opportunity to examine collection materials in search of these ticks, seven herpetological collections were evaluated in search of more individuals, including the largest number Of specimens representative of the distribution of these species of Thoropa. The objectives of the study were to verify if the distribution of O. faccinii follows the distribution of its host; If other stages of O. faccinii also parasitize this host; If O. faccinii parasites other species of Thoropa; If other species of Ornithodoros parasite Thoropa; If there is preference for parasitism in the body of frogs; If there is preference as to the sex and stage of life of the host and to establish its distribution is normal or aggregate. A total of 1868 specimens of the genus Thoropa were examined, with 1026 (54.93%) specimens of T. miliaris, 549 (29.39%) T. taophora, 207 (11.08%) T. megatympanum, 48 (2.57%) T. saxatilis, 21 (1.12%) T. petropolitana and 17 (0.91%) T. lutzi. Of these, only the first three species were parasitized specimens by ticks. 1026 specimens of T. miliaris were examined, being 97 parasitized by 433 O. faccinii larvae. Of the total of 549 T. taophora examined, 65 (11.83%) specimens were parasitized with 183 Argasidae larvae identified as Ornithodoros sp.(morphotype 1). Of the 207 specimens of T. megatympanum examined, 39 specimens were positive, with 104 larvae of Ornithodoros sp.(morphotype 2). It is concluded that the geographic distribution of the carrpatos seems to be associated to its hosts, T. miliaris is host of the larvae of O. faccinii, and Thirteen municipalities in the state of Rio de Janeiro and other municipalities in the states of Minas Gerais, Esp?rito Santo and Bahia were added to the list of distribution of O. faccinii; Two Ornithodoros morphotypes (1 and 2) are recorded, the first associated with T. taophora and the second with T. megatympanum, both Ornithodoros sp.(morphotype 1) is present in five municipalities in the state of S?o Paulo and morphotype 2 in eight municipalities of Minas Gerais and one in Bahia. No significant differences (p>0.05) in parasitism were found among the categories of subadult, male, and female