title: Frequency of species of Eimeria in females of the Holstein-Friesian breed at the post-weaning stage during autumn and winter.
abstract: The frequency of species of the genus Eimeria in a dairy herd in the municipality of Boa Esperança, Southern region of the State of Minas Gerais was assessed. From 37 females of the Friesian breed aged three to seven months, 259 feces samples were analyzed between May and September 2008. The examinations to quantify oocysts per gram of feces (OPG) and identify Eimeria species were conducted at the Veterinary Parasitology Laboratory of the Federal University of Lavras. Eleven species of Eimeria were identified, namely: E. bovis (23.2%), E. zuernii (22.6%), E. ellipsoidalis (20.3%), E. cylindrica (14.1%), E. subspherica (5.4%), E. canadensis (3.5%), E. alabamensis (2.4%), E. auburnensis (2.4%), E. pellita (2.1%), E. brasiliensis (2%) and E. bukidnonensis (1.9%). E. bovis, E. zuernii and E. ellipsoidalis were the most frequent and the ones with the highest oocyst shedding over time (p < 0.05). Differences in OPG counts were found between most months studied (p < 0.05). The large number of Eimeria species found, in particular E. bovis and E. zuernii, indicates that Eimeria sp. has significant pathogenic potential in dairy cattle in the South of Minas Gerais.
authors.affiliation: Departamento de Medicina Veterinária, Universidade Federal de Lavras, Lavras, MG, Brazil. fabio_rpb@yahoo.com.br
authors.forename: Fábio Raphael Pascoti
authors.initials: FR
authors.lastname: Bruhn
authors.forename: Marcos Aurélio
authors.initials: MA
authors.lastname: Lopes
authors.forename: Fabiana Alves
authors.initials: FA
authors.lastname: Demeu
authors.forename: Caio Augusto
authors.initials: CA
authors.lastname: Perazza
authors.forename: Marcos Ferrazani
authors.initials: MF
authors.lastname: Pedrosa
authors.forename: Antônio Marcos
authors.initials: AM
authors.lastname: Guimarães
mesh_terms: D000818:Animals; D001938:Brazil; D002417:Cattle / Q000469:parasitology*; D003612:Dairying; D004539:Eimeria / Q000302:isolation & purification*; D005260:Female; D012621:Seasons; D014886:Weaning