Evaluation of the effects of epidural amitraz in cows

Authors

  • Ricardo Miyasaka de Almeida União Pioneira da Integração Social, Faculdade de Medicina Veterinária, Departamento de Medicina Veterinária, Brasília, DF
  • Carlos Augusto de Araújo Valadão União Pioneira da Integração Social, Faculdade de Medicina Veterinária, Departamento de Medicina Veterinária, Brasília, DF
  • Anderson Farias União Pioneira da Integração Social, Faculdade de Medicina Veterinária, Departamento de Medicina Veterinária, Brasília, DF
  • Juan Carlos Moreno Duque Universidade Estadual Paulista, Faculdade de Ciências Agrárias e Veterinárias, Departamento de Clínica e Cirurgia Veterinária, Jaboticabal, SP
  • Adriana Helena de Souza Universidade Estadual Paulista, Faculdade de Ciências Agrárias e Veterinárias, Departamento de Clínica e Cirurgia Veterinária, Jaboticabal, SP

DOI:

https://doi.org/10.11606/issn.1678-4456.bjvras.2005.26400

Keywords:

Alfa-2 agonist, Amitraz, Analgesia, Cattle, Epidural

Abstract

The amitraz is widely used in veterinary medicine as an acaricide in small and large animals. Several reports showed that the systemic effects caused by epidural administration of this substance are the result of its interaction with a-2 adrenoceptors. In the present study, the effects of epidurally amitraz (0,1 or 0,4 mg.kg-1) or 10% DMSO (5,0 mL) on the heart rate (HR), systolic arterial pressure (SAP), respiratory rate (RR), ruminal motility (RM), rectal temperature (RT), head height (HH), and latency to heat-evoked reflexes (LSPR - skin of perineal region; LHWR - hoof withdrawal reflex) were evaluated. The HR and RM decreased in amitraz groups. There were no statistical differences in RR, SAP and HH among groups. LSPR and LHWR were prolonged in amitraz 0,4 group (T25-T120). We concluded that epidural amitraz does not produce severe systemic effects, and that the higher dose induces prolongation of the latency to heat-evoked reflexes, in cows.

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Published

2005-12-01

Issue

Vol. 42 No. 6 (2005)

Section

UNDEFINIED

License

The journal content is authorized under the Creative Commons  BY-NC-SA  license (summary of the license: https://creativecommons.org/licenses/by-nc-sa/4.0 | full text of the license: https://creativecommons.org/licenses/by-nc-sa/4.0/legalcode) 

How to Cite

1.
Almeida RM de, Valadão CA de A, Farias A, Duque JCM, Souza AH de. Evaluation of the effects of epidural amitraz in cows. Braz. J. Vet. Res. Anim. Sci. [Internet]. 2005 Dec. 1 [cited 2024 Apr. 26];42(6):419-28. Available from: https://revistas.usp.br/bjvras/article/view/26400