title: Trypanosomatids (Protozoa: Kinetoplastida) in three species of Armored Catfish from Mogi-Guaçu river, Pirassununga, São Paulo, Brazil.
abstract: Trypanosome infections have been reported in several species of fish, in majority of cases described on the basis of morphological characteristics. Trypanosomes in fish are heteroxenous and transmitted by hirudineans. This study aims to evaluate the prevalence and density of infections by Trypanosoma sp. in blood from three species of catfish, Hypostomus regani, H. strigaticeps, H. albopunctatus, from the Mogi Guaçu River, Pirassununga, São Paulo, Brazil. Further, this study intends to characterize the Trypanosoma specimens found in the blood of these fish by morphological and molecular techniques. The trypanosomes overall prevalence observed was 47.6% with a general average density of 0.75 parasites/µl of blood. Hypostomus regani and Hypostomus strigaticeps showed a significant difference in prevalence. The average densities of parasites were not significantly different among the three fish species. Similar findings were observed for the monthly variations in densities. The parasites found in the three species of catfish studied showed similar morphological characteristics. The morphological data and the statistical analyses used in this study didn't show the formation of groups. The analyses provided evidence of the presence of pleomorphisms in the trypanosomes found in the three studied fish.
authors.affiliation: Instituto de Biologia, Universidade Estadual de Campinas, Universidade Estadual de Campinas, Campinas SP , Brasil, Departamento de Biologia Animal, Instituto de Biologia, Universidade Estadual de Campinas - UNICAMP, Campinas, SP, Brasil.
authors.forename: Julia Pereira
authors.initials: JP
authors.lastname: Molina
authors.affiliation: Instituto de Tecnologia e Pesquisa, Universidade Tiradentes, Universidade Tiradentes, Aracaju SE , Brasil, Laboratório de Biologia Tropical, Instituto de Tecnologia e Pesquisa, Universidade Tiradentes - UNIT, Aracaju, SE, Brasil.
authors.forename: Rubens Riscala
authors.initials: RR
authors.lastname: Madi
authors.affiliation: Instituto de Biologia, Universidade Estadual de Campinas, Universidade Estadual de Campinas, Campinas SP , Brasil, Laboratório de Diversidade Genética, Departamento de Genética e Evolução e Bioagentes, Instituto de Biologia, Universidade Estadual de Campinas - UNICAMP, Campinas, SP, Brasil.
authors.forename: Vera Nisaka
authors.initials: VN
authors.lastname: Solferini
authors.affiliation: Centro de Pesquisa e Gestão dos Recursos Pesqueiros Continentais, Instituto Chico Mendes de Conservação da Biodiversidade, Pirassununga SP , Brasil, Centro de Pesquisa e Gestão dos Recursos Pesqueiros Continentais - CEPTA, Instituto Chico Mendes de Conservação da Biodiversidade - ICMBio, Pirassununga, SP, Brasil.
authors.forename: Paulo Sérgio
authors.initials: PS
authors.lastname: Ceccarelli
authors.affiliation: Instituto de Matemática, Estatística e Computação Científica, Universidade Estadual de Campinas, Universidade Estadual de Campinas, Campinas SP , Brasil, Instituto de Matemática, Estatística e Computação Científica, Universidade Estadual de Campinas - UNICAMP, Campinas, SP, Brasil.
authors.forename: Hildete Prisco
authors.initials: HP
authors.lastname: Pinheiro
authors.affiliation: Instituto de Biologia, Universidade Estadual de Campinas, Universidade Estadual de Campinas, Campinas SP , Brasil, Departamento de Biologia Animal, Instituto de Biologia, Universidade Estadual de Campinas - UNICAMP, Campinas, SP, Brasil.
authors.forename: Marlene Tiduko
authors.initials: MT
authors.lastname: Ueta
mesh_terms: D000818:Animals; D001938:Brazil; D002397:Catfishes / Q000469:parasitology*; D016830:Kinetoplastida; D045483:Rivers; D014345:Trypanosoma / Q000302:isolation & purification; D014352:Trypanosomiasis / Q000469:parasitology / Q000662:veterinary*