ABSTRACT. Teixeira Filho W.L., Gonçaves L.R. & Lopes C.W.G. Natural coccidiosis infection in water buffaloes (Bubalus bubalis L. 1875) in Southeastern Brazil. [Coccidiose natural em búfalos (Bubalus bubalis L. 1875) no Sudeste do Brasil.] Frequência das espécies do gênero Eimeria Schneider, 1885 (Apicomplexa: Eimeriidae) em Bubalus bubalis Linnaeus, 1875 no sudeste do Brasil. Revista Brasileira de Medicina Veterinária, 38 (supl. 3):1-8, 2016. Departamento de Parasitologia Animal, Anexo 1, Instituto de Veterinária, Universidade Federal Rural do Rio de Janeiro. Campus Seropédica, BR 465 km 7, RJ 23890-000, Brasil.
E-mail: email@example.com Herd of buffaloes in Brazil is related to extensive breedings, where the oc-
cupation of the land is premised on its permanence for being a rustic animal. According to the analyzed data obtained from oocysts of the genus Eimeria recovered from fecal samples and placed to sporulate in 2.5% potassium dichromate. Regarding the identification of the species, the description and measurements of the sporulated oocysts were taken for each identified species. In relation to the morphotypes found, the presence of three specific species from water buffalo, such as: Eimeria bareylli, Eimeria ankarensis and Eimeria gokaki were observed, where the last two species were first reported in Brazil. The most prevalent species in water buffalos in the State of Rio de Janeiro was Eimeria zuernii followed by Eimeria ellipsoidalis both and other of less frequent species were also very common in bovine. Species distribution of the genus Eimeria was not homogeneous in all analized animals, where an animal has eight species, while 88.75% of the total samples had at least four species. The buffalo herds were characterized as extensive breeding, where the animals were keptin place for a long time, regardless of age, and sex and from youth to adults.