title: Prevalence of Neospora caninum antibodies in dogs from dairy cattle farms in Parana, Brazil.
abstract: Serum samples from 134 dogs from 22 cattle dairy farms in the northern region of Parana State, Brazil, were tested for antibodies to Neospora caninum in an indirect fluorescent antibody test. Antibodies (> or = 1:50) to N. caninum were found in 29 (21.6%) of the 134 dogs, and seropositive dogs were found on 14 (63.6%) of the 22 dairy cattle farrms. The antibody titers of dogs were 1:50 (3 dogs), 1:100 (7 dogs), 1:200 (7 dogs), 1:400 (6 dogs), and > or = 1:800 (6 dogs). The low prevalence (9%) in < 1-yr-old dogs compared with the 2- to 3-fold higher prevalence in older dogs (17-29%) suggests postnatal exposure to N. caninum infection.
authors.affiliation: Faculdade de Medicina Veterinária e Zootecnia, Universidade de São Paulo, Cidade Universitária, SP, Brazil.
authors.forename: S L P
authors.initials: SL
authors.lastname: de Souza
authors.forename: J S
authors.initials: JS
authors.lastname: Guimarães
authors.forename: F
authors.initials: F
authors.lastname: Ferreira
authors.forename: J P
authors.initials: JP
authors.lastname: Dubey
authors.forename: S M
authors.initials: SM
authors.lastname: Gennari
mesh_terms: D000818:Animals; D000913:Antibodies, Protozoan / Q000097:blood; D001938:Brazil / Q000453:epidemiology; D002417:Cattle; D003048:Coccidiosis / Q000453:epidemiology / Q000276:immunology / Q000469:parasitology / Q000662:veterinary*; D003612:Dairying; D004197:Disease Reservoirs / Q000662:veterinary; D004283:Dog Diseases / Q000097:blood / Q000453:epidemiology / Q000276:immunology / Q000469:parasitology*; D004285:Dogs; D005260:Female; D019084:Fluorescent Antibody Technique, Indirect / Q000662:veterinary; D008297:Male; D018688:Neospora / Q000302:isolation & purification*; D016036:Seroepidemiologic Studies
chemical_list: D000913:Antibodies, Protozoan