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Abstract

The aim of this study was to determine the population risk factors affecting the bovine herds in the X Region of Chile in order to obtain a brucellosis-free status. A matched case-control study was designed according to the size of the herd, and univariate and multivariate statistical tests were...

Author(s)
Rosenfeld, C.; Blas, I. de; Ernst, S.; Ramírez, C.; Rivera, A.; Silva, E.; Rojas, H.
Publisher
Facultad de Ciencias Veterinarias, Universidad Austral de Chile, Valdivia, Chile
Citation
Archivos de Medicina Veterinaria, 2007, 39, 1, pp 27-34
Abstract

A prospective study was carried out to determine the serological response to the official tests used in Chile for the detection of bovine brucellosis in adult cows vaccinated with 2 doses of vaccine strain RB-51 from a brucellosis-free herd as certified by the Servicio Agrícola y Ganadero (SAG) of...

Author(s)
Ramírez, C.; Ernst, S.; Elvinger, F.
Publisher
Facultad de Ciencias Veterinarias, Universidad Austral de Chile, Valdivia, Chile
Citation
Archivos de Medicina Veterinaria, 2009, 41, 2, pp 171-174
Abstract

The serological response to brucellosis vaccination and the time to eradicate the disease from herds were compared in dairy cattle vaccinated with either vaccine strains 19 or RB-51. Serological records from 79 herds in the province of Valdivia, 10th region of Chile, were evaluated. Herds had been...

Author(s)
Ramirez, M.; Ernst, S.; Elvinger, F.; Rivera, A.; Rosenfeld, C.
Publisher
Facultad de Ciencias Veterinarias, Universidad Austral de Chile, Valdivia, Chile
Citation
Archivos de Medicina Veterinaria, 2002, 34, 2, pp 213-220
Abstract

From a total of 1937 cattle slaughtered from April to June 1992, 1011 livers from 252 heifers up to 2.5 years old, 503 bullocks up to 3.5 years and 256 cows older than 2.5 years, were condemned due to different pathological conditions. Surface of the liver and the sliced parenchyma were examined...

Author(s)
Valenzuela, G.; Bascuñán, M.; Bayer, L.; Ernst, S.
Citation
Archivos de Medicina Veterinaria, 1995, 27, 1, pp 29-34
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

In neutralization tests for bovine diarrhoea/mucosal disease (BVD/MD) seroprevalence on 948 cow serum samples collected from 40 large herds of the IXth and Xth Regions in southern Chile, and on 116 bulls, 700 of the 948 cows were positive (73.8%) at a titre of ≥ 1:5. The herd seroprevalence was...

Author(s)
Reinhardt, G.; Riedemann, S.; Ernst, S.; Aguilar, M.; Enriquez, R.; Gallardo, J.
Citation
Preventive Veterinary Medicine, 1990, 10, 1-2, pp 73-78
Abstract

During the seven-year period, 98 624 slaughtered cattle were examined and 81% were infected with Echinococcus, 13% Fasciola and 0.04% Cysticercus. Of 23 566 sheep, 79% were infected with Echinococcus and 1% with Fasciola. Of 61 874 pigs, 59% were infected with Echinococcus, 0.7% with Fasciola, 0.7% ...

Author(s)
Ernst, S.; Aguilar, H.
Citation
Boletin Chileno de Parasitologia, 1978, 33, 3/4, pp 66-68
Abstract

The prevalences of various parasitic diseases recorded in cattle, pigs and sheep slaughtered during 1970 to 1976 at Valdivia, Chile, are tabulated. Of a total of 98 624 cattle, 80 154 (81.3%) had hydatid cysts, 13 116 (13.3%) had fascioliasis and 44 (0.04%) had cysticerciasis. The prevalence of...

Author(s)
Ernst, S.; Aguilar, H.
Citation
Boletin Chileno de Parasitologia, 1978, 33, 3/4, pp 66-69
Abstract

A questionnaire about hydatidosis was sent to 37 farms in Tierra del Fuego Province, Chile, which has a population of 6,174 persons, 1,142,000 sheep and 30,946 cattle. During 1976, 35,947 sheep were slaughtered and 64.8% were infected with hydatid. Infection was more common in older sheep than in...

Author(s)
Vargas, E.; Ernst, S.; Sievers, G.
Citation
Boletin Chileno de Parasitologia, 1978, 33, 1/2, pp 18-24

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