PDF(Pubmed)
Abstract：
Neospora caninum is a major cause of reproductive loss in cattle worldwide as it leads to abortion and animal repositioning. Although Toxoplasma gondii does not cause a reproductive problem in cattle, consuming raw or uncooked beef poses the risk of transmission. This study aimed to evaluate the occurrence of anti-N. caninum and anti-T. gondii antibodies in dairy cattle in the West and Northwest regions of São Paulo State, Brazil. A total of 653 serum samples from dairy cows were analyzed using an indirect immunofluorescence assay (IFA). Epidemiological data from the farms were associated with the serological results of the animals by logistic regression based on the presence of antibodies. The frequencies of the antibodies against N. caninum and T. gondii were 41.6% (272/653) and 11.5% (75/653), respectively. A statistically significant association was observed between: the serum anti-N. caninum antibodies and breed, history of food supplementation for calves, introduction of outside animals that later presented reproductive problems, and history of reproductive problems by the trimester of gestation. The present study highlights the importance of neosporosis in dairy cattle in the study regions and that the inclusion of this parasite in the investigation of animals with reproductive disorders is important.
摘要：
犬新孢子虫是全球牛生殖丧失的主要原因，因为它导致流产和动物重新定位。虽然弓形虫不会引起牛的生殖问题，食用生牛肉或未煮熟的牛肉会带来传播风险。本研究旨在评估抗N的发生。caninum和反T.圣保罗州西部和西北地区的奶牛中的gondii抗体，巴西。使用间接免疫荧光测定法（IFA）分析了来自奶牛的总共653份血清样品。通过基于抗体存在的逻辑回归，将来自农场的流行病学数据与动物的血清学结果相关联。抗体频率分别为41.6%(272/653)和11.5%(75/653),分别。之间观察到统计学上的显着关联：血清抗N。犬抗体和品种，小牛补充食物的历史，引入后来出现生殖问题的外部动物，和妊娠三个月的生殖问题史。本研究强调了新孢子虫病在研究区域的奶牛中的重要性，并且在研究患有生殖障碍的动物时纳入这种寄生虫很重要。
