title: Coccidia of Brazilian mammals: Eimeria marajoensis N. Sp. (Apicomplexa: Eimeriidae) from the Anteater, Tamandua tetradactyla (Xenarthra: Myrmecophagidae).
abstract: Feces from a juvenile specimen of the anteater Tamandua tetradactyla from Ponta de Pedras, Marajó, Pará, northern Brazil, contained three different coccidial oocysts: Eimeria tamanduae Lainson, 1968; E. corticulata Lainson & Shaw, 1990; and a third species previously unrecorded and described here as Eimeria marajoensis n. sp. Oocysts of the latter parasite are spherical to subspherical, 13.9 +/- 1.5 x 13.4 +/- 1.4 (11.1-16.5 x 11.1-16.5) microns, shape index (length/width) 1.0 (1.0-1.2). The oocyst wall is a single, colorless layer about 0.6-1.0 microns thick with no striations or micropyle. There is no oocyst residuum, but a single, round, oval or irregularly shaped polar granule of about 0.75-2.5 microns is consistently present. The sporocysts are broadly ellipsoidal, 7.1 +/- 0.7 +/- 5.3 +/- 0.6 (6.0-8.8 x 4.0-5.7) microns, shape index 1.3 (1.2-1.5), with a delicate wall bearing minute stieda body. No sub-stieda body was visible. The sporocyst residuum consists of some 10-20 rounded granules, lying between the two slightly curved sporozoites which measure approximately 6.5 x 2.0 microns. Sporocyst refractile bodies were not discernable.
authors.affiliation: Wellcome Parasitology Unit, Instituto Evandro Chagas, Fundação Nacional de Saúde, Belém, Pará, Brazil.
authors.forename: R
authors.initials: R
authors.lastname: Lainson
authors.forename: J J
authors.initials: JJ
authors.lastname: Shaw
mesh_terms: D000818:Animals; D001938:Brazil; D003048:Coccidiosis / Q000175:diagnosis / Q000469:parasitology / Q000662:veterinary; D004539:Eimeria / Q000145:classification / Q000302:isolation & purification*; D005243:Feces / Q000469:parasitology; D010784:Photomicrography; D004490:Xenarthra / Q000469:parasitology*