Arteaga-Troncoso G, Jiménez-Estrada J M, Montes De Oca-Jimenez R, López-Hurtado M, Luna-Alvarez M, Hernandez-Andrade L, Moreno-Alfaro A, Galan-Herrera J F, Guerra-Infante F M
Department of Immunobiochemistry,National Institute of Perinatology,Mexico City,Mexico.
Faculty of Veterinary Medicine, Universidad Autonoma del Estado de Mexico, UAEM,Toluca,Mexico.
Epidemiol Infect. 2015 Oct;143(13):2894-902. doi: 10.1017/S0950268814003549. Epub 2015 Jan 20.
A number of recent reports emphasize the risk of zoonotic diseases and the high degree of prevalence of asymptomatic animals infected with Leptospira interrogans. This report sought to assess the prevalence of antibodies to certain serovars of L. interrogans, and to describe the association between seropositivity and risk factors associated with within-flock transmission in a mountainous region of Mexico. Overall seroprevalence to L. interrogans was 54·5% (95% confidence interval 48·3-60·7); the most frequent serovar was Icterohaemorrhagiae. The accumulation of placentas and fetuses at a site close to lambing paddocks can play a significant role as a risk factor for within-flock transmission of L. interrogans in transhumant farming systems in the municipality of Xalatlaco. The high prevalence of L. interrogans antibodies supports the hypothesis that natural foci of this zoonosis are present in sheep flocks in this area. These findings emphasize the need for planning and implementation of control programmes for ovine leptospirosis in Mexico and elsewhere.
近期的一些报告强调了人畜共患病的风险以及感染问号钩端螺旋体的无症状动物的高流行率。本报告旨在评估针对问号钩端螺旋体某些血清型的抗体流行率，并描述血清阳性与墨西哥山区羊群内传播相关风险因素之间的关联。问号钩端螺旋体的总体血清阳性率为54.5%（95%置信区间48.3 - 60.7）；最常见的血清型是出血性黄疸型。在Xalatlaco市的游牧养殖系统中，靠近产羔围场的地点胎盘和胎儿的堆积作为问号钩端螺旋体在羊群内传播的风险因素可发挥重要作用。问号钩端螺旋体抗体的高流行率支持了该地区绵羊群中存在这种人畜共患病自然疫源地的假设。这些发现强调了在墨西哥及其他地区规划和实施羊钩端螺旋体病控制项目的必要性。
