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Abstract

The anthelmintic resistance of bovine nematodes against ivermectin was determined in 2 farms in southern Chile. A total of 14 and 22 bovines aged 7-8 months from farms 1 (near Purranque) and 2 (near San Pablo), respectively, were treated with 0.2-ml/kg ivermectin. Faecal samples were obtained from...

Author(s)
Sievers, G.; Alocilla, A.
Publisher
Facultad de Ciencias Veterinarias, Universidad Austral de Chile, Valdivia, Chile
Citation
Archivos de Medicina Veterinaria, 2007, 39, 1, pp 67-69
Abstract

The purpose of this study is to evaluate whether Plantago lanceolata (narrow leaf plantain), as a supplemental forage, reduces the egg output of gastrointestinal nematodes in calves. The trial was conducted on a farm in the 10th Region, Chile. Two groups of 15 calves weighing 171.4±19.8 kg grazed...

Author(s)
Sievers, G.; Nannig, S.
Publisher
Facultad de Ciencias Veterinarias, Universidad Austral de Chile, Valdivia, Chile
Citation
Archivos de Medicina Veterinaria, 2006, 38, 3, pp 233-238
Abstract

Naturally infected cattle from a farm in Chile were divided into control (placebo) and experimental (3 types of ivermectin and 1 each of moxidectin, abamectin and doramectin, each at 0.2 mg/kg) groups for the treatment of Ostertagia ostertagi, Trichostrongylus and Cooperia spp. infections. Faecal...

Author(s)
Sievers, G.; Fuentealba, C.
Publisher
Facultad de Ciencias Veterinarias, Universidad Austral de Chile, Valdivia, Chile
Citation
Archivos de Medicina Veterinaria, 2003, 35, 1, pp 81-88
Abstract

A study was undertaken to determine which section (upper or lower) of grass is preferred by infective larvae (L3) of Trichostrongylidae of cattle and whether the larvae show a diurnal vertical migration pattern on the grass. Weekly grass samples were taken from a 0.6 ha pasture with calves, from a...

Author(s)
Sievers, G.; Quintana, I.; Cortese, F.; Ernst, S.
Citation
Archivos de Medicina Veterinaria, 1998, 30, 1, pp 47-54
Abstract

The trial was carried out in a dairy farm in Valdivia, southern Chile, from April to July 1989. Of 40 grazing heifers weighing around 248 kg 10 were injected s.c. with 7.5 mg/kg levamisole, 10 received 7.5 mg/kg spot-on levamisole, 10 were drenched with 8 mg/kg, and 10 were untreated controls....

Author(s)
Sievers, G.; Guzmán, O.
Citation
Archivos de Medicina Veterinaria, 1991, 23, 1, pp 41-48
Abstract

In central Chile, pasture plots were experimentally contaminated with faeces from 3- to 6-month-old calves at monthly intervals for one year. The most frequent genera were Trichostrongylus and Cooperia, and both had a similar pattern of density and survival over the year. The most favourable period ...

Author(s)
Cattan, P.; Grumberg, J.; Valderas, J.; Palavicino, J.
Citation
Parasitologia al Día, 1984, 8, 3, pp 68-72