The role of freshwater fish in the life cycle of Dioctophyme renale in Southern Brazil.

Autor: Mascarenhas CS; Laboratório de Parasitologia de Animais Silvestres, Instituto de Biologia, Universidade Federal de Pelotas, Campus Universitário, caixa postal: 354, CEP 96010-900 Pelotas, Rio Grande do Sul, Brazil. Electronic address: phrybio@hotmail.com., Müller G; Laboratório de Parasitologia de Animais Silvestres, Instituto de Biologia, Universidade Federal de Pelotas, Campus Universitário, caixa postal: 354, CEP 96010-900 Pelotas, Rio Grande do Sul, Brazil., de Macedo MRP; Laboratório de Parasitologia de Animais Silvestres, Instituto de Biologia, Universidade Federal de Pelotas, Campus Universitário, caixa postal: 354, CEP 96010-900 Pelotas, Rio Grande do Sul, Brazil., Henzel ABD; Laboratório de Parasitologia de Animais Silvestres, Instituto de Biologia, Universidade Federal de Pelotas, Campus Universitário, caixa postal: 354, CEP 96010-900 Pelotas, Rio Grande do Sul, Brazil., Robaldo RB; Laboratório de Fisiologia Aplicada a Aqüicultura, Instituto de Biologia, Universidade Federal de Pelotas, Campus Universitário, caixa postal: 354, CEP 96010-900 Pelotas, Rio Grande do Sul, Brazil., Corrêa F; Laboratório de Ictiologia e Ecologia Aquática, Universidade Federal do Acre, Rodovia BR 364 Km 04, CEP 69915-900 Rio Branco, Acre, Brazil.
Jazyk: angličtina
Zdroj: Veterinary parasitology, regional studies and reports [Vet Parasitol Reg Stud Reports] 2019 Apr; Vol. 16, pp. 100274. Date of Electronic Publication: 2019 Feb 20.
DOI: 10.1016/j.vprsr.2019.100274
Abstrakt: Brazil stands out by the diverse records of Dioctopphyme renale in different hosts; however, there is little information about the life cycle of the nematode in the region. This study aims to report on third-stage larvae infections in fish in southern Brazil. In this context, 324 fish of different species belonging to Characiformes, Cyprinodontiformes and Siluriformes were collected in an urban area of Rio Grande do Sul State, where domestic and wild hosts were reported with the nematode. Of the total fish examined, 25(7.7%) were found to be parasitized by third-stage larvae of D. renale which were found encysted in the stomach serous membrane and in the celoma cavity of Hoplosternum littorale (Siluriformes) with a prevalence of 53.2% (25/47) and mean intensity of infection of 4.4 larvae/host (1 to 13 larvae). The occurrence of larvae in H. littorale indicates the presence of parasitosis in the region; however, the contribution of this fish species as a source of infection for dogs in urban areas must be considered with caution given the difficulties these dogs may face in the capture and predation of the fish to the point of effectively maintaining the urban cycle of D. renale. In addition, the low level of larvae registered in the total sample of fish examined indicates that these hosts are unlikely to play an important role in the transmission of D. renale to domestic animals in the region of the study.
(Copyright © 2019 Elsevier B.V. All rights reserved.)
Databáze: MEDLINE
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