Héctor Ruiz, Delia Lacasta, Sergio Villanueva-Saz, José María González, Aurora Ortín, Juan José Ramos, Alfredo Ángel Benito, Agustín Estrada-Peña, Antonio Fernández, Marina Pomar, Marta Ruiz de Arcaute
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引用次数: 0
Abstract
Ovine anaplasmosis is causing relevant economic losses in Spain due to icteric carcass condemnation in lambs. Anaplasma ovis infection occurs through grazing sheep that transfer ticks to their offspring. This study compared the efficacy of deltamethrin and cypermethrin pour-on treatments for tick control. A total of 250 PCR A. ovis-positive ewes and their offspring were divided into 5 groups. Group A (50 ewes/50 lambs) was kept as an untreated control group. In groups B (50/50) and C (45/93), the lambs were treated with deltamethrin pour-on and cypermethrin pour-on, respectively, one week after birth. In groups D (50/75) and E (51/68), the ewes were treated with cypermethrin pour-on and deltamethrin pour-on one week before the estimated parturition. External parasite assessment and A. ovis PCR were conducted before treatment and at 21 and 42 days post-treatment. Ewes were checked weekly for tick-detection until weaning. Lamb carcasses were examined at the slaughterhouse. Riphicephalus sanguineus sensu lato ticks were found in ewes throughout the study, with only one tick found in a control group lamb. Three lambs tested positive for A. ovis during the trial, with one condemnation at the abattoir due to jaundice. However, no significant differences were observed between treatment groups. Overall, a significant decrease in infected animals and condemned carcasses was observed compared to previous years, suggesting that deltamethrin and cypermethrin prevent A. ovis transmission from dams to lambs. Further studies are needed to confirm synthetic pyrethroids' effectiveness in controlling tick infestation and averting A. ovis transmission to lambs.
绵羊无形体病在西班牙造成了相关的经济损失,原因是羔羊胴体发黄。绵羊是通过放牧将蜱虫传染给后代而感染绵羊无形体病的。这项研究比较了溴氰菊酯和氯氰菊酯浇注剂对蜱虫控制的效果。总共 250 只 PCR A. ovis 阳性母羊及其后代被分为 5 组。A 组(50 只母羊/50 只羔羊)为未处理对照组。B 组(50/50)和 C 组(45/93)的羔羊在出生一周后分别使用溴氰菊酯乳油和氯氰菊酯乳油。在 D 组(50/75)和 E 组(51/68)中,母羊在预产期前一周分别使用氯氰菊酯浇注剂和溴氰菊酯浇注剂。在治疗前、治疗后 21 天和 42 天进行体外寄生虫评估和 A. ovis PCR 检测。在断奶前,每周对母羊进行一次蜱虫检测。在屠宰场检查羔羊尸体。在整个研究过程中,母羊身上都发现了Riphicephalus sanguineus sensu lato蜱,对照组羔羊身上只发现了一只蜱。试验期间,有三只羔羊的猫蜱检测呈阳性,其中一只因黄疸而被屠宰场处死。不过,治疗组之间没有发现明显差异。总体而言,与往年相比,受感染动物和报废屠体的数量明显减少,这表明溴氰菊酯和氯氰菊酯可防止猫吸虫从母畜传染给羔羊。还需要进一步的研究来证实合成除虫菊酯在控制蜱虫侵扰和避免猫蜱传播给羔羊方面的有效性。
期刊介绍:
Veterinary Research Communications publishes fully refereed research articles and topical reviews on all aspects of the veterinary sciences. Interdisciplinary articles are particularly encouraged, as are well argued reviews, even if they are somewhat controversial.
The journal is an appropriate medium in which to publish new methods, newly described diseases and new pathological findings, as these are applied to animals. The material should be of international rather than local interest. As it deliberately seeks a wide coverage, Veterinary Research Communications provides its readers with a means of keeping abreast of current developments in the entire field of veterinary science.