First documentation of dose response of Amblyomma cf. parvum population infesting dogs to amitraz, coumaphos, and cypermethrin.

Autor: Rodríguez-Vivas RI; Facultad de Medicina Veterinaria y Zootecnia, Campus de Ciencias Biológicas y Agropecuarias, Universidad Autónoma de Yucatán, km. 15.5 Carretera Mérida-Xmatkuil, Mérida, Yucatán CP. 97000, Mexico. Electronic address: rvivas@correo.uady.mx., Ojeda-Chi MM; Facultad de Ciencias Biológicas y Agropecuarias región Tuxpan. Universidad Veracruzana, Tuxpan de Rodríguez Cano, Veracruz, Mexico., Trinidad-Martinez I; Facultad de Medicina Veterinaria y Zootecnia, Campus de Ciencias Biológicas y Agropecuarias, Universidad Autónoma de Yucatán, km. 15.5 Carretera Mérida-Xmatkuil, Mérida, Yucatán CP. 97000, Mexico., Flota-Burgos GJ; Facultad de Medicina Veterinaria y Zootecnia, Campus de Ciencias Biológicas y Agropecuarias, Universidad Autónoma de Yucatán, km. 15.5 Carretera Mérida-Xmatkuil, Mérida, Yucatán CP. 97000, Mexico., Ojeda-Robertos NF; División Académica de Ciencias Agropecuarias, Universidad Juárez Autónoma de Tabasco, Carr. Villahermosa-Teapa, km 25, Villahermosa, Tabasco CP 86280, Mexico.
Jazyk: angličtina
Zdroj: Veterinary parasitology [Vet Parasitol] 2024 Dec; Vol. 332, pp. 110328. Date of Electronic Publication: 2024 Oct 10.
DOI: 10.1016/j.vetpar.2024.110328
Abstrakt: Amblyomma cf. parvum (Ixodida: Ixodidae) is an ectoparasite of domestic animals and wildlife on the American continent. There is little information on the efficacy of acaricides for the control of this tick species in domestic animals. Here, we determined the toxicological response of A. cf. parvum to amitraz, coumaphos, and cypermethrin. Engorged females of A. cf. parvum were collected (in two periods, eight months apart) from dogs in Yucatan, Mexico. The larval immersion test was used on the progeny of adult female ticks to test for amitraz susceptibility, and the larval package test was used to test for coumaphos and cypermethrin susceptibility. Dose-mortality regressions, lethal concentrations (LC), 95 % confidence intervals (CI95 %), and slopes were estimated by probit analysis. The lethal concentrations to kill 50 % of the tick population for amitraz, coumaphos, and cypermethrin in the first period were 1 ppm (CI95 %: 1-3 ppm), 10 ppm (CI95 %: 9-11 ppm), and 10 ppm (CI95 %: 9-10 ppm), respectively; meanwhile in the second period were 2 ppm (CI95 %: 1-3 ppm), 8 ppm (CI95 %: 6-10 ppm), and 9 ppm (CI95 %: 8-10 ppm), respectively. In conclusion, amitraz, coumaphos, and cypermethrin demonstrated high larvicidal efficacy in in vitro bioassays against A. cf. parvum populations infesting dogs.
Competing Interests: Declaration of Competing Interest The authors declare that there is no conflict of interest.
(Copyright © 2024 Elsevier B.V. All rights reserved.)
Databáze: MEDLINE
Externí odkaz: