150794 20260217205605.0 doi 10.1007/s11259-024-10562-2 sideral 142715 ART-2024-142715 eng Ruiz, Héctor Universidad de Zaragoza (orcid)0000-0002-8474-2831 Tick control prevents carcass condemnations in lambs caused by Anaplasma ovis 2024 Access copy available to the general public Unrestricted 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. info:eu-repo/grantAgreement/ES/DGA/A15-20R info:eu-repo/semantics/openAccess by https://creativecommons.org/licenses/by/4.0/deed.es 2.0 2024 VETERINARY SCIENCES 43 / 170 = 0.253 2024 Q2 T1 0.568 2024 Veterinary (miscellaneous) 2024 Q1 Medicine (miscellaneous) 2024 Q2 2.6 2024 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Lacasta, Delia Universidad de Zaragoza (orcid)0000-0002-7822-6646 Villanueva-Saz, Sergio Universidad de Zaragoza (orcid)0000-0001-6209-4282 González, José María Universidad de Zaragoza (orcid)0000-0002-4655-9171 Ortín, Aurora Universidad de Zaragoza (orcid)0000-0002-0313-5926 Ramos, Juan José Universidad de Zaragoza (orcid)0000-0002-2724-2785 Benito, Alfredo Ángel Estrada-Peña, Agustín Universidad de Zaragoza (orcid)0000-0001-7483-046X Fernández, Antonio Universidad de Zaragoza (orcid)0000-0002-2557-4890 Pomar, Marina Ruiz de Arcaute, Marta Universidad de Zaragoza (orcid)0000-0002-7655-2472 1009 773 Universidad de Zaragoza Dpto. Patología Animal Área Sanidad Animal 1009 617 Universidad de Zaragoza Dpto. Patología Animal Área Medicina y Cirugía Animal 48, 6 (2024), 3899-3906 Vet. res. commun. Veterinary Research Communications 0165-7380 866654 http://zaguan.unizar.es/record/150794/files/texto_completo.pdf Versión publicada 2278890 http://zaguan.unizar.es/record/150794/files/texto_completo.jpg?subformat=icon icon Versión publicada oai:zaguan.unizar.es:150794 articulos driver 2026-02-17-20:46:38 ARTICLE