Characterization and Distribution of Isospora sabiai N. SP. (Apicomplexa: Eimeriidae) from Thrushes Turdus spp. (Passeriformes: Turdidae) from Brazil.

A new coccidian species (Protozoa: Apicomplexa: Isospora) is described parasitizing white-necked thrushes Turdus albicollis Vieillot, 1818; rufous-bellied thrushes Turdus rufiventris Vieillot, 1818; pale-breasted thrushes Turdus leucomelas Vieillot, 1818; and yellow-legged thrushes Turdus flavipes Vieillot, 1818 from 3 different localities in Brazil. Isospora sabiai n. sp. has oocysts that are subspherical to ellipsoidal, 20.9 × 18.6 µm, with smooth, delicate, bilayered wall, ∼1.1 µm thick. Micropyle inconspicuous or imperceptible. Oocyst residuum absent, but small polar granules rounded or comma-shaped are present. Sporocysts are elongate ellipsoidal to reniform, 16.5 × 9.2 µm. The Stieda body is knob-like. Sub-Stieda body rounded to conical, sometimes homogeneous with the Stieda body. Sporocyst residuum is present, usually as a cluster of numerous granules. Sporozoites are vermiform with 2 refractile bodies. The oocysts and sporocysts of I. sabiai n. sp. are uniform in the proportionality of width on length, but exhibited different patterns of size associated with each host species; therefore, an ecological discussion is introduced aimed at associating these morphometrical patterns of the oocysts with the habits of the different species of thrushes. This is the seventh isosporoid coccidian reported from New World turdids.

Contribution on the study of Isospora hemidactyli Carini, 1936 and a report of an adeleid pseudoparasite of the house gecko Hemidactylus mabouia, from the Rio de Janeiro Metropolitan Region, Brazil.

A description of the coccidium Isospora hemidactyli from the house gecko Hemidactylus mabouia, a very common at dwellings in Rio de Janeiro Metropolitan Region, was made in this study. Histograms and linear regression were made for this species and determined the homogeneity of these oocysts despite of large range. Besides it, polysporocystid oocysts also were recovered from feces of the H. mabouia house gecko and they were similar to those described previously as the genus Adelina. This species should be parasitizing an invertebrate ingested by house gecko, and for that reason, is a pseudoparasite. Oocysts of I. hemidactyli were subspherical to ellipsoidal, 24.4 x 22.3 microm, with single-layered wall and one polar granule. Sporocysts were subspherical to ellipsoidal, 11.8 x 9.8 microm with Stieda and substieda bodies, residuum and sporozoites with refractile body. Oocysts of the pseudoparasite Adelina sp. were ellipsoidal, 36.3 x 30.9 microm, with bi-layered wall and without micropyle, residuum and polar granule. Eight to 15 sporocysts were presents and were subspherical to broadly ellipsoidal, 12.4 x 11.2 microm. Stieda and substieda bodies were absent. Sporozoites present refractile bodies at both ends.

Isospora vanriperorum Levine, 1982 (Apicomplexa: Eimeriidae) in the green-winged saltator, Saltator similis (Passeriformes: Cardinalinae) in southeastern Brazil.

Isospora vanriperorum from the green-winged saltator (Saltator similis) is described in Southeastern Brazil. Oocysts are spherical to subspherical, 19.4-26 by 18.3-26 micro (23.1 by 22.4 micro), shape index 1.04 with a single layered wall, fine, smooth and yellowish. Micropyle and residuum are absents, but one elliptical polar granule is present. Sporocysts are ovoid, 14.5-20.2 by 8.1-12.5 micro (16.3 by 10.8 micro), shape index 1.53 with prominent Stieda body, barely discernible substieda body and residuum centered and granulated.

Contribution on the study of Isospora hemidactyli Carini, 1936 and a report of an adeleid pseudoparasite of the house gecko Hemidactylus mabouia, from the Rio de Janeiro Metropolitan Region, Brazil / Contribuição para o estudo de Isospora hemidactyli Carini, 1936 e relato de um pseudoparasita adelídeo da lagartixa doméstica Hemidactylus mabouia da região Metropolitana do Rio de Janeiro, Brasil

A description of the coccidium Isospora hemidactyli from the house gecko Hemidactylus mabouia, a very common at dwellings in Rio de Janeiro Metropolitan Region, was made in this study. Histograms and linear regression were made for this species and determined the homogeneity of these oocysts despite of large range. Besides it, polysporocystid oocysts also were recovered from feces of the H. mabouia house gecko and they were similar to those described previously as the genus Adelina. This species should be parasitizing an invertebrate ingested by house gecko, and for that reason, is a pseudoparasite. Oocysts of I. hemidactyli were subspherical to ellipsoidal, 24.4 × 22.3μm, with single-layered wall and one polar granule. Sporocysts were subspherical to ellipsoidal, 11.8 × 9.8μm with Stieda and substieda bodies, residuum and sporozoites with refractile body. Oocysts of the pseudoparasite Adelina sp. were ellipsoidal, 36.3 × 30.9μm, with bi-layered wall and without micropyle, residuum and polar granule. Eight to 15 sporocysts were presents and were subspherical to broadly ellipsoidal, 12.4 × 11.2μm. Stieda and substieda bodies were absent. Sporozoites present refractile bodies at both ends.

Uma descrição do coccídio Isospora hemidactyli da lagartixa doméstica Hemidactylus mabouia, muito comum em residências da região metropolotana do Rio de Janeiro, foi feita neste estudo. Os histogramas e a regressão linear para esta espécie confirmaram a homogeneidade de seus oocistos apesar da grande amplitude de variação. Além disto, oocistos polisporocísticos também foram recuperados das fezes de H. mabouia e foram semelhantes aos descritos anteriormente no gênero Adelina. Esta espécie devia estar parasitando um invertebrado ingerido pela lagartixa doméstica, e por essa razão, é um pseudoparasita. Oocistos de I. hemidactyli foram sub-esféricos a elipsóides, 24,4 × 22,3μm, com parede simples e um grânulo polar. Os esporocistos foram subesféricos a elipsóides, 11,8 × 9,8μm com corpos de Stieda e substieda, resíduo e esporozoítas com corpo refráctil. Oocistos do pseudoparasita Adelina sp. foram elipsóides, 36,3 × 30,9μm, com parede dupla e sem micrópila, resíduo e grânulo polar. Oito a 15 esporocistos estavam presentes e foram subesféricos a elipsóides, 12,4 × 11,2μm. Os corpos de Stieda e substieda estavam ausentes. Os esporozoítas apresentam corpos refrácteis em ambas as extremidades.

Isospora vanriperorum Levine, 1982 (apicomplexa: eimeriidae) in the green-winged saltator, Saltator similis Lafresnaye and D'orbigny, 1837 (passeriformes: cardinalinae) in southeastern Brazil / Isospora vanriperorum Levine, 1982 (apicomplexa: eimeriidae) no trinca-ferro Saltator similis Lafresnaye and D'orbigny, 1837 (passeriformes: cardinalinae) no sudeste do Brasil

Isospora vanriperorum from the green-winged saltator (Saltator similis) is described in Southeastern Brazil. Oocysts are spherical to subspherical, 19.4-26 by 18.3-26μm (23.1 by 22.4μm), shape index 1.04 with a single layered wall, fine, smooth and yellowish. Micropyle and residuum are absents, but one elliptical polar granule is present. Sporocysts are ovoid, 14.5-20.2 by 8.1-12.5μm (16.3 by 10.8μm), shape index 1.53 with prominent Stieda body, barely discernible substieda body and residuum centered and granulated.

Isospora vanriperorum de trinca-ferro verdadeiro (Saltator similis) é descrita no sudeste do Brasil. Os oocistos são esféricos a subesféricos medindo 19,4-26 por 18,3-26μm (23,1 por 22,4μm), índice morfométrico de 1,04 com parede única, fina, lisa e amarelada. A micrópila e o resíduo estão ausentes, mas um grânulo polar elíptico está presente. Os esporocistos são ovóides medindo 14,5-20,2 por 8,1-12,5μm (16,3 por 10,8μm), índice morfométrico de 1,53 com corpo de Stieda proeminente, corpo de substieda mal discernível e resíduo central e granular.