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PubMed2001

Five new species of coccidia (Apicomplexa: Eimeriidae) from Madagascan chameleons (Sauria: Chamaeleonidae).

Coprological examination of 19 Madagascan chameleons of the genera Furcifer and Brookesia revealed the presence of five new coccidian species. Isospora brygooi n. sp. from Furcifer pardalis has spherical to subspherical oöcysts with a slightly pitted wall, 20.7 (17-24.5) x 19.3 (16-23) microm and broadly ellipsoidal sporocysts, 12.2 (11.5-13) x 8.1 (8-8.5) microm, with Stieda and substieda bodies. Oöcysts of Eimeria glawi n. sp. from Furcifer pardalis are cylindrical to ellipsoidal, 27.7 (26-29.5) x 18.4 (17-19) microm, with ellipsoidal sporocysts, 7.3 (6.5-8) x 5.2 (5-5.5) microm. E. vencesi n. sp. described from F. pardalis has spherical to subspherical oöcysts, 14.3 (13-15.5) x 13.0 (12-13) microm, with small granules, one to three globular polar granules and ellipsoidal sporocysts, 7.3 (6.5-8) x 5.2 (5-5.5) microm. E. worthi n. sp., described from Furcifer oustaleti has spherical oöcysts, 17.9 (17.5-19.0) x 15.0 (14.5-16.0) microm without a polar granule and ellipsoidal to cylindroidal sporocysts, 8.2 (7.0-9.5) x 5.8 (5.0-6.5) microm. Oöcysts of E. brookesiae n. sp. from Brookesia decaryi are cylindrical, 25.6 (23-27) x 15.0 (13-16) microm with ellipsoidal sporocysts, 10.1 (9-11) x 6.9 (6-7) microm. Endogenous development of E. vencesi is confined to the intestine, while that of E. glawi occurs in the gall-bladder.

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PubMed2002

The endogenous development of four new species of Isospora Schneider, 1881 (Apicomplexa: Eimeriidae) from Australian geckos.

Four new species of Isospora are described from Australian geckoes. Isospora gehyrae n. sp. from Gehyra cf. variegata in South Australia have 18.5-22.5 x 17.5-20.0 microm oöcysts with 10.0-12.5 x 7.5-9.0 microm sporocysts; endogenous stages develop in the host cell cytoplasm. Of the two species found in Heteronotia binoei from northern Queensland, Isospora cytoheteronotis n. sp., with oöcysts of 20.0-26.0 x 17.5-25.0 microm and sporocysts of 10.0-13.5 x 7.5-11.5 microm, undergoes endogenous development in its host cell cytoplasm, whereas I. nucleoheteronotis n. sp., with oöcysts of 17.5-22.5 x 17.5-21.5 microm and sporocysts of 9.0-12.5 x 6.5-10.0 microm, develops in the host cell nucleus. I. oedurae n. sp. from Oedura rhombifer in northern Queensland has oöcysts of 22.5-25.0 x 22.5-24.0 microm and sporocysts of 12.5-14.0 x 7.5-11.5 microm, and undergoes endogenous development in its host cell nuclei.

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PubMed2003

A survey of coccidian infections of freshwater fishes of Peninsular Malaysia, with descriptions of three species of Goussia Labbé, 1896 (Apicomplexa: Eimeriidae).

Ninety-five specimens of 14 freshwater fish species from small streams in the Kuala Terengganu district and the Lake Kenyir Reservoir, Malaysia, were surveyed for coccidian infections. Six fish species proved to be infected with apicomplexans belonging to the genus Goussia. In all of these fishes Goussia species were found in unsporulated and semisporulated stages. Oöcysts of four species inhabiting the intestinal epithelium became sporulated in tap-water within 24 hours. In two fish species sporulation failed and only unsporulated oöcysts were recorded in the intestine. Three of the intestinal species finishing sporulation proved to be new to science and were described as Goussia malayensis n. sp., G. bettae n. sp. and G. pogonognathi n. sp. from Apocheilus panchax, Betta splendens and Hemirhamphodon pogonognatus, respectively. The fourth species, found in Trichogaster pectoralis, was identified as G. trichogasteri Székely & Molnár, 1992, a species known from aquarium-cultured T. trichopterus.

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PubMed2004

Eimeria atheridis n. sp. (Apicomplexa: Eimeriidae), a new coccidium from the western bush viper Atheris chlorechis (Pel, 1851) from tropical Africa.

Coprological examination of nine bush vipers Atheris chlorechis imported from Ghana revealed the presence of a new coccidian species belonging to Eimeria Schneider, 1875. Thin walled oöcysts of Eimeria atheridis n. sp. are spherical to slightly subspherical, 22.8 (19-26) x 22.5 (19-25) microm, without micropyle, polar granule and oöcyst residuum. Sporocysts are elongately ellipsoidal, 17.1 (15-19) x 7.5 (6-8) microm, with a dome like, relatively flat Stieda body. Sporozoites possess two refractile bodies and distinct transversal striation. Based on the presence of a Stieda body the species described herein clearly belongs to the Eimeria ( sensu stricto ).

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PubMed2004

A survey of coccidian infection of freshwater fishes in South Africa, with the description of Goussia anopli n. sp. (Apicomplexa: Eimeriidae).

Seventy-seven specimens of seven freshwater fish species harvested in four sites from rivers and ponds of the Gauteng, North West and Limpopo Provinces (South Africa) were surveyed for coccidian infections. Two fish species were infected with apicomplexans belonging to Goussia Labbé, 1896. In banded tilapia Tilapia sparrmanii Smith unsporulated oöcysts of G. vanasi (Landsberg & Paperna, 1987) were found which became sporulated in tap-water within 24 hours. Another species in the gut of chubbyhead barb Barbus anoplus Weber harboured sporulated oöcysts in the faeces and in the intestinal epithelium. The latter species has been described as G. anopli n. sp.

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PubMed2000

On Eimeria bragancaensis n. sp. (Apicomplexa: Eimeriidae) and tissue-cysts of an unidentified protozoan in the bat Peropteryx macrotis (Chiroptera: Emballonuridae) from Amazonian Brazil.

A description is given of the mature oocysts and endogenous stages of Eimeria bragancaensis n. sp., from the small intestine of the bat Peropteryx macrotis from north Brazil. Oocysts are spherical to subspherical, 15.9 x 14.6 microns (range 14-17 x 14-17.7). The wall is of two layers: an outer, thicker one which is of a brownish-yellow colour and striated (pitted), and an inner one which is thin and colourless. The outer layer is frequently lost. No micropyle or oocyst residuum present, but the oocyst usually contains one or two polar bodies. Sporocysts 8.4 x 5.3 microns (range 6.25-9 x 4-6) with inconspicuous Stieda and substiedal bodies. Endogenous stages are intracytoplasmic in the epithelial cells of the small intestine, above the host-cell nucleus. Stages of merogony and gametogony are described. Abundant tissue-cysts of an unidentified protozoan, containing from 1-4 zoites, were found in the parenchyma cells of the liver and, less frequently, in the lamina propria of the small intestine. Their possible nature is discussed.

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PubMed2005

Two new species of Eimeria (Apicomplexa: Eimeriidae) from Asian geoemydid turtles Kachuga tentoria and Melanochelys trijuga (Testudines: Geoemydidae).

Coprological examination of ten Pink-ringed tent turtles Kachuga tentoria circumdata, recently imported from India, and three Burmese black turtles Melanochelys trijuga edeniana, imported from Myanmar, revealed the presence of two new species of Eimeria. Oocysts of Eimeria kachua n. sp. from K. t. circumdata are broadly oval to subspherical, 15.3 (13-18) x 13.9 (12-16) microm, with polar granule and subspherical oocyst residuum. Sporocyst elongatelly oval to spindle-shaped, 8.7 (7.5-10) x 4.9 (4-6) microm, with a knoblike Stieda body, covered with fine membranous cupola-like structures. Thin walled oocysts of Eimeria patta n. sp. from M. t. edeniana, have an irregular shape, influenced by the position of sporocysts, frequently with lobular irregularities, 12.6 (11-16) x 9.1 (7.5-12) microm. Sporocysts are oval to ellipsoidal, 5.8 (5-7) x 4.2 (3.5-5) microm.

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PubMed2005

Parasites of the squirrel Sciurus spadiceus (Rodentia: Sciuridae) from Amazonian Brasil, with particular reference to Eimeria damnosa n. sp. (Apicompiexa: Eimeriidae).

A description is given of the mature oocysts and endogenous stages of Eimeria damnosa n. sp. from the small intestine of the red squirrel, Sciurus spadiceus, from the State of Acre, north Brazil. Ten of 12 animals examined were infected. Oocysts ovoid to ellipsoidal, occasionally cylindrical but not with parallel sides, 30.2 x 20.0 microm (18.0 x 15.0-40.2 x 30.0), shape-index (ratio length/width) 1.5 (1.3-1.8), n = 40. Oocyst wall smooth, colourless, with no micropyle, apparently of a single layer measuring approximately 1.0-1.5 microm thick. No oocyst residuum, but approximately 50 % of the oocysts with a single spherical, ovoid or dumbbell-shaped polar body. Sporocysts pear-shaped, 15.0 x 8.0 microm (11.0 x 6.0-16.0 x 8.0), shape index 1.9 (1.8-2.0), n = 33. Stieda body, if it merits this name, appears only as a slight thickening of the sporocyst wall at the more pointed extremity. Endogenous stages intracytoplasmic in the epithelial cells of the duodenum and throughout the ileum, above the host cell nucleus. Sporulation frequently completed in the lumen of the intestine, but most oocysts mature outside the host at some time within 24 hours. Massive infections may result in extensive desquamation of the gut epithelium, and sometimes in the death of the animal. In addition to this coccidian, one squirrel showed abundant trophozoites of a Giardia sp., in the ileum. The liver of two others contained developing and mature meronts, producing large numbers of slender merozoites, and other cyst-like bodies containing a small number of large zoites (sporozoites?). No parasites were detected in the blood of any of the squirrels that could be associated with this unidentified protozoan. Histological sections of the ileum of one squirrel revealed a globidium-like parasite in the lamina propria: it contained a very large number of slender, curved zoites. Three animals were with a sheathed microfilaria in the peripheral blood and liver smears. Finally, a Trypanosoma cruzi-like trypanosome was isolated from the blood of one squirrel and a T. lewisi-like trypanosome from two others.

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