Paiz Laís Moraes, da Silva Rodrigo Costa, Menozzi Benedito Donizete, Langoni Helio
Departamento de Saúde Coletiva, Faculdade de Ciências Médicas, Universidade Estadual de Campinas, Campinas, SP, Brasil.
Department of Pathobiology and Population Medicine, College of Veterinary Medicine, Mississippi State University, Mississippi State, USA.
Rev Bras Parasitol Vet. 2015 Jan-Mar;24(1):95-100. doi: 10.1590/S1984-29612015009.
Neosporosis is an emergent disease responsible for considerable economic impact due to reproductive losses. Its zoonotic potential remains unknown. This study involved a survey of antibodies to Neospora caninum in slaughtered sheep and their association with epidemiological variables. Serum samples from 596 sheep from the states of São Paulo and Rio Grande do Sul, Brazil, were collected in two slaughterhouses located in São Paulo and evaluated by indirect fluorescence antibody test (IFAT), using cut-off titers of 25. Among these samples, 353/596 (59.23%; 95%CI 55.23-63.10) were positive and 263/353 (74.50%; 95%CI 69.71-78.77%) were from Rio Grande do Sul. Statistical associations were determined in the univariate analysis between the serological results and sex, breed and municipality of origin. Sheep that came from extensive breeding system showed higher chance (OR=2.09) of presenting antibodies to N. caninum in relation to those from semi-intensive system. Higher chance was also observed for the different studied breeds, except Bergamácia, in relation to Hampshire Down. The results revealed the presence of infection by N. caninum in sheep from slaughterhouses.
新孢子虫病是一种新发疾病，因其导致繁殖损失而造成相当大的经济影响。其人畜共患病潜力尚不清楚。本研究对屠宰绵羊中抗犬新孢子虫抗体进行了调查，并分析了其与流行病学变量的关联。从巴西圣保罗州和南里奥格兰德州的596只绵羊中采集血清样本，这些样本来自圣保罗的两家屠宰场，并通过间接荧光抗体试验（IFAT）进行评估，临界滴度设定为25。在这些样本中，353/596（59.23%；95%置信区间55.23 - 63.10）呈阳性，其中263/353（74.50%；95%置信区间69.71 - 78.77%）来自南里奥格兰德州。在单因素分析中确定了血清学结果与性别、品种和产地市之间的统计学关联。与来自半集约化养殖系统的绵羊相比，来自粗放式养殖系统的绵羊出现抗犬新孢子虫抗体的几率更高（比值比=2.09）。与汉普夏绵羊相比，除贝加马西亚品种外，其他所研究品种出现抗体的几率也更高。结果显示屠宰场的绵羊存在犬新孢子虫感染。
