Host-Parasite relationships and co-infection of nasal mites of Chrysomus ruficapillus (Passeriformes: Icteridae) in southern Brazil

ABSTRACT

One hundred twenty-two Chrysomus ruficapillus were examined in southern Brazil, in order to research the presence of nasal mites and the parasite-host relationships. Nasal mite infections were analyzed for presence of Ereynetidae and Rhinonyssidae considering the total number of hosts examined; Sexual maturity of males (juveniles and adults); Periods of bird collection and presence of co-infections. Were identified five taxa, four belongs to Rhinonyssidae (Sternostoma strandtmanni, Ptilonyssus sairae, P. icteridius and Ptilonyssus sp.) and one to Ereynetidae (Boydaia agelaii). Adult males were parasitized for one taxa more than juvenile males. Co-infections occurred in 22 hosts, between two, three and four taxa, belonging to Ereynetidae and Rhinonyssidae.The co-infections were more prevalent in austral autumn / winter. The host-parasite relations and co-infections by nasal mites in C. ruficapillus were reported for the first time, contributing to the knowledge about nasal mites in Brazil.(AU)

RESUMO

Cento e vinte e dois Chrysomus ruficapillus foram examinados no extremo sul do Brasil, a fim de pesquisar a presença de ácaros nasais e as relações hospedeiro-parasito. As infecções por ácaros nasais foram analisadas quanto a presença de Ereynetidae e Rhinonyssidae considerando o total dos hospedeiros examinados; a maturidade sexual dos machos (juvenis e adultos); períodos de coleta das aves e presença de co-infecções. Foram identificados cinco taxa, quatro pertencentes à Rhinonyssidae (Sternostoma strandtmanni, Ptilonyssus sairae, P. icteridius and Ptilonyssus sp.) e um à Ereynetidae (Boydaia agelaii). Machos adultos foram parasitados por um taxa a mais do que os machos juvenis. Co-infecções ocorreram em 22 hospedeiros, entre dois, três e quatro taxa, pertencentes à Ereynetidae e Rhinonyssidae. As co-infecções foram mais prevalentes no outono/inverno austral. As relações hospedeiro-parasito e co-infecções por ácaros nasais em C. ruficapillus foram relatadas pela primeira vez, contribuindo para o conhecimento do hospedeiro e ampliando as informações sobre ácaros nasais no Brasil.(AU)