PAKISTAN
VETERINARY
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Prevalence of Resistant Strains of Rhipicephalus Microplus to Acaricides in Cattle Ranch in the Tropical Region of Tecpan of Galeana, Guerrero, Mexico
 
J. Olivares-Pérez*, S. Rojas-Hernández, M.T. Valencia-Almazan, I. Gutiérrez-Segura and E.J. Míreles-Martínez
Faculty of Veterinary Medicine, University Autonomous of Guerrero, km. 3.0 carr. Nal. Altam.-Iguala.  Cd. Altamirano, Gro., Mexico CP 40660. Tel/fax: 767 67 23494.
*Corresponding author: olivaares@hotmail.com

Abstract   

Tick and tick borne diseases cause many problems to the cattle industry worldwide. The prevalence of resistant strains of Rhipicephalus microplus to different acaricides on cattle farms in the tropical region of Tecpan of Galeana, Guerrero, Mexico, and risk factors related to prevalence of resistant strains of R. microplus. Sixty one ranches infested were sampled; in each ranch were collected 30-50 fully-engorged female R. microplus ticks, of 10 cattle randomly selected, and evaluated in their progeny resistance to acaricides, using the larval packet test. The prevalence of resistant strains was total pyrethroids and amitraz. In organophosphorus 31.1, 48.3 and 82.2% of strains were resistant to clorpyriphos, coumaphos and diazinon, respectively. Risk factors favored (P<0.05) the development of resistant strains of acaricides. We concluded that the resistance of R. microplus to acaricides used to control a problem, and risk factors (livestock management) have accelerated the development of resistance.

Key words: Acaricides; Resistance; Rhipicephalus microplus

 
   

ISSN 0253-8318 (Print)
ISSN 2074-7764 (Online)



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