RESUMO
Despite 12 coccidian species had been recorded from passerines of the Thraupidae family, none of them has been reported in the Parque Nacional do Itatiaia, in Southeastern Brazil. This locality is a protected area with a high degree of vulnerability, and is considered a "conservation island" of biodiversity. The aim of the current work was describe Isospora ramphoceli Berto, Flausino, Luz, Ferreira, Lopes, 2010 from ruby-crowned tanagers Tachyphonus coronatus Vieillot, 1822 in the Parque Nacional do Itatiaia. The oocysts of I. ramphoceli are subspheroidal, 23.1 × 22.1 µm, with smooth, bilayered wall. Micropyle, oocyst residuum and polar granule are absent. Sporocysts are ellipsoidal or ovoidal, 16.2 × 10.8 µm. Stieda body is knob-like and substieda body is large and homogeneous. Sporocyst residuum is composed of many scattered granules. Sporozoites are vermiform with a posterior refractile body and a nucleus. In addition to new locality, this is the first description of I. ramphoceli from T. coronatus.
Assuntos
Doenças das Aves/parasitologia , Isospora/classificação , Isosporíase/veterinária , Passeriformes/parasitologia , Animais , Brasil/epidemiologia , Isosporíase/epidemiologia , Isosporíase/parasitologiaRESUMO
A new species of coccidian, Isospora guaxi n. sp., and Isospora bellicosa Upton, Stamper & Whitaker, 1995 (Protozoa: Apicomplexa: Eimeriidae) are recorded from red-rumped caciques Cacicus haemorrhous (L.) in the Parque Nacional do Itatiaia, Brazil. Isospora guaxi n. sp. has sub-spheroidal oöcysts, measuring on average 30.9 × 29.0 µm, with smooth, bi-layered wall c.1.9 µm thick. Micropyle and oöcyst residuum are absent, but a polar granule is present. Sporocysts are ellipsoidal, measuring on average 19.3 × 13.8 µm. Stieda body is knob-like and sub-Stieda body is prominent and compartmentalized. Sporocyst residuum is composed of scattered granules. Sporozoites are vermiform, with one refractile body and a nucleus. Isospora bellicosa has sub-spheroidal to ovoidal oöcysts, measuring on average 27.1 × 25.0 µm, with smooth, bi-layered wall c.1.5 µm thick. Micropyle and oöcyst residuum are absent, but one or two polar granules are present. Sporocysts are ellipsoidal, measuring on average 18.1 × 10.9 µm. Stieda body is knob-like and sub-Stieda body is rounded to rectangular. Sporocyst residuum is composed of a cluster of compact or diffuse granules. Sporozoites are vermiform, with one refractile body and a nucleus. Isospora bellicosa was originally described from the Peruvian meadowlark Sturnella bellicosa deFilippi, a trans-Andean icterid which is allopatric with the cis-Andean C. haemorrhous. Therefore, in conclusion, this current study reveals the dispersion of coccidia from Icteridae across the Andes Mountains, besides describing the sixth isosporoid coccidium infecting an icterid bird.
Assuntos
Coccídios/fisiologia , Isospora/classificação , Isospora/fisiologia , Passeriformes/parasitologia , Animais , Brasil , Demografia , Isospora/citologia , Oocistos/citologia , Especificidade da Espécie , Esporozoítos/citologiaRESUMO
A new isosporoid coccidian species (Protozoa: Apicomplexa: Eimeriidae) is reported from the southern house wren Troglodytes musculus, a very well distributed species in South and Central America. Isospora corruirae sp. nov. oocysts are subspherical to ovoidal, 24.1 × 21.4 µm, with smooth, bilayered wall. Micropyle and oocyst residuum are absent, but small spherules and splinter-like granules are frequently present. Sporocysts are ovoidal to piriform, 14.0 × 9.5 µm. Stieda body is prominent knob-like and substieda body is delicate. Sporocyst residuum is composed of scattered fragments of different sizes. Sporozoites are vermiform with posterior refractile bodies, anterior striations and a nucleus. This is the second description of an isosporoid coccidium infecting a New World wren.
Assuntos
Doenças das Aves/parasitologia , Coccidiose/veterinária , Isospora/classificação , Isospora/isolamento & purificação , Aves Canoras/parasitologia , Animais , Brasil , Coccidiose/parasitologia , Isospora/citologia , Oocistos/citologiaRESUMO
A new coccidian species (Protozoa: Apicomplexa: Isospora) parasitizing the white-shouldered fire-eye Pyriglena leucoptera (Vieillot, 1818) is described in the Parque Nacional do Itatiaia. This park is a protected area in southeastern Brazil with a high degree of vulnerability, representing a "conservation island" of biodiversity. Isospora parnaitatiaiensis n. sp. has oocysts that are ellipsoidal, 23.8 × 19.4 µm, with smooth, bilayered wall, ~1.1 µm thick. Micropyle and oocyst residuum are absent, but one or two polar granules are present. Sporocysts are ellipsoidal, 14.6 × 9.3 µm. The Stieda body is nipple- to knob-like and sub-Stieda body rounded to rectangular. Sporocyst residuum is present, usually as a cluster of numerous granules. Sporozoites are vermiform with two refractile bodies and a nucleus. This is the second isosporoid coccidian described from antbirds (Thamnophilidae).
Assuntos
Doenças das Aves/parasitologia , Coccidiose/veterinária , Isospora/isolamento & purificação , Passeriformes/parasitologia , Animais , Brasil , Núcleo Celular/ultraestrutura , Coccidiose/parasitologia , Fezes/parasitologia , Isospora/classificação , Isospora/citologia , Oocistos/citologia , Esporozoítos/citologiaRESUMO
The New World tyrant-flycatcher (Tyrannidae) Attila rufus (Vieillot, 1819) is commonly known as grey-hooded attila or 'capitão-de-saíra' in Brazil (Sick 1997; CBRO 2014). This species has a wide distribution and their population trends appear to be stable; therefore, it is least concern according to IUCN (2015) criteria.