In the present study the tick prevalence, mean intensity of infestation and species were recorded on birds captured between January 2009 and December 2010 in the Ecological Station Pirapitinga-ESEC from Minas Gerais State, Brazil. A total of 967 birds, from 15 families and 40 species were captured and 165 (17.1 %) individuals were parasitized by ticks. Of these 160 (97 %) belonged to the order Passeriformes. Five tick species were identified: Amblyomma longirostre (n = 274) was the most common species followed by Amblyomma parvum (n = 43), Amblyomma nodosum (n = 39), Amblyomma ovale (n = 24) and Riphicephalus sanguineus (n = 7). None of 61 unengorged larvae molted to nymph. The mean intensity of infestation was 2.7 ± 2.4 ticks per bird (448 ticks/165 birds) ranging from 1 to 10. Only 19 (11.4 %) birds were infested with one species of tick. The remaining birds were infested by two, three or four species of ticks. Also new hosts for all five ticks were recorded. Only nymphs were recorded throughout the year with two similar peaks during autumn and winter 2009 and 2010.
Este estudo buscou evidenciar o papel das enteroparasitoses como fator adicional de pressão biológica sobre as espécies de aves silvestres locais e migratórias. a ocorrência de endoparasitos pode ser considerada como indicador de alterações indesejáveis das condições higiênicas, acarretando diminuição das áreas naturais com comprometimento dos locais de descanso e da qualidade do hábitat utilizado como ponto de alimentação aviária. setenta e cinco amostras fecais foram coletadas no câmpus da Universidade Federal Rural do Rio de Janeiro (UFRRJ), Brasil, entre agosto 2007 e maio 2008, e analisadas em lugol e pela técnica de Faust.Das amostras analisadas, 82,66% foram positivas para parasitas entéricos, 44% parasitados por tricomonadídeos, 5,33% com o gênero Chilomastix, 52% com oocistos de coccídeos, 29,33% por formas vegetativas de Entamoeba coli, 37,33% com Iodamoeba butschlii e 10,66% com ovos de helmintos. a elevada prevalência de enteroparasitas indica a necessidade de estudos mais detalhados e avaliações mais frequentes de saneamento deste hábitat, cujo impacto parece estar associado às precárias condições higiênicas locais decorrentes da crescente antropização na região.
Two new coccidian (Protozoa: Apicomplexa: Eimeriidae) species from the Brazilian tanager Ramphocelus bresilius dorsalis are reported in the current study. Isospora cadimi n. sp. oocysts are spheroidal to sub-spheroidal, 24.2 x 22.9 microm, with a smooth and bi-layered wall, approximately 1.1 microm. Micropyle, oocyst residuum, and polar granule are absent. Sporocysts are broadly ovoidal, 16.9 x 11.6 microm. Stieda and substieda bodies are present. Sporocyst residuum is present and sporozoites have refractile body and nucleus. Isospora navarroi n. sp. oocysts are spheroidal to sub-spheroidal, 21.4 x 20.6 microm, with a smooth and bi-layered wall, approximately 1.1 microm. Micropyle, oocyst residuum, and polar granule are absent. Sporocysts are ellipsoidal, 16.1 x 10.2 microm. Stieda and substieda bodies are present. Sporocyst residuum is present and sporozoites have a robust posterior refractile body.
Pesq. Vet. Bras. 31(9):798-805, setembro 2011 RESUMO.-[Coccídios isosporóides (Apicomplexa: Eimeriidae) parasitos de traupídeos (Passeriformes: Thraupidae) da ilha de Marambaia, Brasil.] Nos últimos anos, alguns coccídios de aves foram registrados na Ilha da Marambaia, que é um ambiente protegido com uma grande biodiversidade de aves, principalmente traupídeos. No presente estudo Isospora tiesangui, I. sepetibensis, I. ramphoceli, I. navarroi, I. cadimi e I. marambaiensis foram identificadas de acordo com suas respectivos hospedeiros da Ilha da Marambaia, RJ. Essas espécies foram caracterizadas com histogramas, regressão linear e análi-se de variância (ANOVA). A principal característica de identificação foi a morfologia do esporocisto, principalmente os corpos de stieda e substieda, uma vez que a morfometria não forneceu diferenciação suficiente. Além disso, Dacnis cayana e Thraupis palmarum foram registrados como novos hospedeiros para I. sepetibensis e I. navarroi respectivamente.
In the current study, two new coccidian species (Protozoa: Apicomplexa: Eimeriidae) obtained from short-crested flycatcher Myiarchus ferox (Gmelin) are reported from Brazil. Isospora feroxis n. sp. has oöcysts which are spheroidal to sub-spheroidal, 18.7 x 18.0 microm, with a smooth and bi-layered wall, c. 1.2 microm. The micropyle and oöcyst residuum are absent, but two polar granules are present. Its sporocysts are broadly ellipsoidal and 11.7 x 8.5 microm. Stieda and substieda bodies are present. A sporocyst residuum is present and the sporozoites have a refractile body and nucleus. Oöcysts of Eimeria sicki n. sp. are spheroidal to sub-spheroidal, 30.3 x 28.5 microm, with a smooth and bi-layered wall, c. 1.3 microm. The micropyle, oöcyst residuum and polar granule are absent. Its sporocysts are ellipsoidal, 18.4 x 10.0 microm. Stieda and substieda bodies are present. A sporocyst residuum is present and sporozoites have a refractile body and nucleus.
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