SEROLOGICAL SURVEY OF IGG ANTIBODIES AGAINST NEOSPORA CANINUM IN THE SOUTHWEST REGION OF PARANÁ

Abstract

Bovine neosporosis is caused by the protozoan Neospora caninum and is the leading infectious cause of abortions in cattle, resulting in significant economic losses. Despite the importance of dairy farming in Paraná, especially in the Southwest, there is a scarcity of studies on the disease. The objective of this study is to identify the presence of IgG antibodies against N. caninum in dairy cattle in the region, contributing to the epidemiological diagnosis of the disease. Samples were collected from 60 females from six farms with a history of reproductive problems. Analyses were performed using the ImmunoComb Bovine Neospora caninum® test, which detects specific antibodies. Of the animals evaluated, 31.6% were seropositive, with significant variations between farms. One farm tested negative for all animals, while others showed high rates, with up to 60% positivity. The presence of dogs and the lack of biosecurity were associated with higher infection rates. The results highlight the importance of serology as a diagnostic tool and disease monitoring for early identification and appropriate management. Thus, the survey contributes to understanding the epidemiology of bovine neosporosis in the region, serving as a basis for raising awareness among producers and guiding future control measures, reducing the reproductive and economic impacts on herds.