SciELO - Scientific Electronic Library Online

 
vol.39 número1Identificación de fragilidad cromosómica mediante 5’azacitidina en linfocitos de bovinosNuevos registros de Phthiraptera (Artropoda: Insecta) en Lama pacos Linnaeus 1758, en Chile índice de autoresíndice de materiabúsqueda de artículos
Home Pagelista alfabética de revistas  

Archivos de medicina veterinaria

versión impresa ISSN 0301-732X

Resumen

SIEVERS, G  y  ALOCILLA, A. Anthelminthic resistance of bovine nematodes against ivermectin in two farms of the south of Chile. Arch. med. vet. [online]. 2007, vol.39, n.1, pp. 67-69. ISSN 0301-732X.  http://dx.doi.org/10.4067/S0301-732X2007000100010.

Anthelminthic resistance of bovine nematodes against ivermectin was determined in two farms in the south of Chile: one of them located near Purranque (Farm 1) and the other near San Pablo (Farm 2), in which 14 and 22 bovines aged 7 to 8 months were treated with 0.2 ml/kg of ivermectin, respectively. Faecal samples were obtained from each animal 7 days before and 21 days after the treatment to carry out the faecal egg count reduction test (FECRT). A 90.3% of egg count reduction was found in Farm 1, with Trichostrongylus and Cooperia as the most resistant genera. In Farm 2 there was 73.5% of egg count reduction, with Nematodirus as the most resistant genera followed by Cooperia and Trichostrongylus. It was concluded that there was anthelminthic nematode resistance to ivermectin in Farm 2, while in Farm 1 resistance was gradually appearing.

Palabras llave : anthelminthic resistance; ivermectin; bovine.

        · resumen en Español     · texto en Español     · pdf en Español