RESUMOAnticorpos anti-Neospora caninum foram detectados pela reação de imunofluorescência indireta (RIFI), em cães errantes e domiciliados das áreas urbana, periurbana e rurais de Curitiba, estado do Paraná, Brasil. Do total de 556 cães, 18,17% (101) foram soropositivos para N. caninum (título de 1:50). A frequência de anticorpos foi de 12,71% nos cães urbanos, de 15,73% nos periurbanos e de 25,38% nos cães rurais. Nos cães rurais a frequência de anticorpos foi maior do que nos cães urbanos (P<0.05). Não houve diferença significativa entre as frequências de anticorpos dos cães urbanos e periurbanos (P>0,05), e dos periurbanos e rurais (P>0,05). Os anticorpos anti N. caninum foram detectados em 34 de 233 cães domiciliados (14,59%) e em 17 de 126 cães errantes (13,49%). Não houve diferença estatística significativa entre o tipo de criação e a origem (P>0,05). Neospora caninum está presente nos cães urbanos e periurbanos de Curitiba e nas áreas rurais do Estado do Paraná. PALAVRAS-CHAVE: Neosporose; anticorpos; reação de imunofluorescência indireta. INTRODUCTIONNeospora caninum is an apicomplexan protozoan that was first described and isolated from dogs (DUBEY et al., 1988) and later associated with bovine abortion. The parasite has since been recognized as one of the major causes of abortion There were no significant differences between the frequencies of antibodies in urban and periurban dogs (P>0.05), and between dogs from periurban and rural areas (P>0.05). Antibodies to N. caninum were detected in 34 of 233 domiciled dogs (14.59%) and in 17 of 126 stray dogs (13.49%). No statistical differences were observed considering life-style and geographic location of origin (P>0.05). Neospora caninum is widespread among dogs from urban, periurban and rural areas of the municipal district of Curitiba, Paraná, Brazil.
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