Filho Paulo César G A, Oliveira Júnior M B, Andrade Muller R, Silva José G, Kim Pomy C P, Almeida Jonatas C, Porto Wagnner J N, Mota Rinaldo A
Department of Veterinary Medicine, Laboratory of Infectious-Contagious Diseases of Domestic Animals, Universidade Federal Rural de Pernambuco, Rua Dom Manoel de Medeiros, 52171-900, Recife, PE, Brazil.
Department of Veterinary Medicine, Laboratory of Parasitology and Parasitic Diseases, Universidade Federal de Alagoas, Fazenda São Luís, 57000-000, Viçosa, AL, Brazil.
Comp Immunol Microbiol Infect Dis. 2017 Jun;52:19-22. doi: 10.1016/j.cimid.2017.05.006. Epub 2017 May 15.
The infection by Neospora caninum in sheep can lead to abortion and the birth of weak and debilitated lambs. The aim of this study was to assess the incidence of natural infection by Neospora caninum and the vertical transmission rate among sheep. A flock of 50 sheep was monitored for serum antibody titres against N. caninum and seroconversion over a period of six months using an indirect ELISA technique. The offspring of the herd was also investigated regarding anti-N. caninum antibodies to determine the vertical transmission rate through the indirect immunofluorescence technique. The initial and final prevalences of infection by N. caninum were 26.0% (13/50) and 72.0% (36/50), respectively, and the incidence of infection by N. caninum in the present study was 62.2% (23/37). The vertical transmission rate found was 15.4% (2/13). A high incidence of infection by N. caninum in sheep was observed, and this is the first report assessing the incidence of N. caninum among naturally infected sheep.
犬新孢子虫感染绵羊可导致流产以及产出体弱和衰弱的羔羊。本研究的目的是评估绵羊中犬新孢子虫自然感染的发生率以及垂直传播率。使用间接ELISA技术，对一群50只绵羊进行了为期六个月的血清抗犬新孢子虫抗体滴度和血清转化监测。还对该羊群的后代进行了抗犬新孢子虫抗体检测，以通过间接免疫荧光技术确定垂直传播率。犬新孢子虫感染的初始患病率和最终患病率分别为26.0%（13/50）和72.0%（36/50），本研究中犬新孢子虫感染的发生率为62.2%（23/37）。发现的垂直传播率为15.4%（2/13）。观察到绵羊中犬新孢子虫感染的发生率很高，这是评估自然感染绵羊中犬新孢子虫发生率的首篇报告。
