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Abstract

The aim of this study was to propose reference intervals (RI) for blood markers of mineral balance in prepartum and lactating groups of dairy cows in the South of Chile. The blood concentrations values of calcium, inorganic phosphate, magnesium, sodium, potassium, copper and zinc and ratio...

Author(s)
Wagemann, C.; Wittwer, F.; Chihuailaf, R.; Noro, M.
Publisher
Facultad de Ciencias Veterinarias, Universidad Austral de Chile, Valdivia, Chile
Citation
Archivos de Medicina Veterinaria, 2014, 46, 1, pp 121-125
Abstract

The purpose of this study was to evaluate the effect of different levels of concentrate supplementation on the productive response of dairy cows fed high daily herbage allowance of spring pasture. The study was conducted from September to November of 2005. 28 spring calving Friesian cows were...

Author(s)
Pulido, R. G.; Escobar, A.; Follert, S.; Leiva, M.; Orellana, P.; Wittwer, F.; Balocchi, O.
Publisher
Facultad de Ciencias Veterinarias, Universidad Austral de Chile, Valdivia, Chile
Citation
Archivos de Medicina Veterinaria, 2009, 41, 3, pp 197-204
Abstract

The aim of this study was to describe and compare the frequency of mineral imbalances in groups of prepartum and lactating dairy cows in the south of Chile. The blood concentrations of calcium, inorganic phosphate, magnesium, sodium, potassium, copper and zinc, calcium:inorganic phosphate ratio and ...

Author(s)
Wagemann, C.; Wittwer, F.; Chihuailaf, R.; Noro, M.
Publisher
Facultad de Ciencias Veterinarias, Universidad Austral de Chile, Valdivia, Chile
Citation
Archivos de Medicina Veterinaria, 2014, 46, 3, pp 363-373
Abstract

This study was undertaken to evaluate the influence of daily pasture allowance and concentrate type on ruminal pH, the ammonia nitrogen (N-NH3) and the volatile fatty acid (VFA) concentrations in the rumen of autumn-calving dairy cows in early lactation. Three Chilean Black Friesian cows fitted...

Author(s)
Sotelo, J.; Noro, M.; Wittwer, F.; Smulders, J. P.; Pulido, R. G.
Publisher
Facultad de Ciencias Veterinarias, Universidad Austral de Chile, Valdivia, Chile
Citation
Archivos de Medicina Veterinaria, 2012, 44, 2, pp 167-172
Abstract

Blood metabolites concentrations present diurnal variations related to food intake. An experiment was carried out to evaluate diurnal variations in the blood metabolites concentration related to feeding behavior in grazing lactating cows. Eight Frisian cows, 60 to 90 days of lactation, were kept...

Author(s)
Noro, M.; Borkert, J.; Hinostroza, G. A.; Pulido, R.; Wittwer, F.
Publisher
Facultad de Ciencias Veterinarias, Universidad del Zulia, Maracaibo, Venezuela
Citation
Revista Cientifica, Facultad de Ciencias Veterinarias, Universidad del Zulia, 2011, 21, 2, pp 125-130
Abstract

The content of selenium (Se) in forage samples and the blood activity of glutathione peroxidase (GSH-Px; EC 1.11.1.9) of groups of lactating cows and heifers were evaluated between autumn and spring of 1999 in 12 dairy herds from IXth Region (38° S and 71° W) of Chile. Se concentration was...

Author(s)
Wittwer, F.; Araneda, P.; Ceballos, A.; Contreras, P. A.; Andaur, M.; Böhmwald, H.
Publisher
Facultad de Ciencias Veterinarias, Universidad Austral de Chile, Valdivia, Chile
Citation
Archivos de Medicina Veterinaria, 2002, 34, 1, pp 49-57
Abstract

Forage samples were obtained from 25 dairy farms in the 9th and 10th regions of Chile in 1999. Iodine (I) concentrations were analysed by a kinetic-colorimetric method. It was shown that iodine samples were below 0.4 ppm on a dry matter basis, averaging 0.20±0.08 ppm. Forage with normal I...

Author(s)
Contreras, P. A.; Ceballos, A.; Matamoros, R.; Wittwer, F.
Publisher
Facultad de Ciencias Veterinarias, Universidad Austral de Chile, Valdivia, Chile
Citation
Archivos de Medicina Veterinaria, 2003, 35, 1, pp 75-79
Abstract

An experiment was designed to study the effects of selenium supplementation with sodium selenite on blood activity of glutathione peroxidase (GSH-Px; EC 1.11.1.9) and liveweight gain of selenium deficient grazing dairy heifers from two dairy farms from the south of Chile. A total of 80 Friesian...

Author(s)
Oblitas, F.; Contreras, P. A.; Böhmwald, H.; Wittwer, F.
Citation
Archivos de Medicina Veterinaria, 2000, 32, 1, pp 55-62
Abstract

Heparinized blood samples were taken from 5 groups (15- to 60-day-old calves; 6- to 12-month-old female calves; heifers; prepartum cows, and cows in the early stages of lactation) of 7 animals each from 8 dairy herds in the Province of Valdivia Chile in the autumn of 1995. Groups of heifers and...

Author(s)
Ceballos, A.; Wittwer, F.; Contreras, P. A.; Böhmwald, H.
Citation
Archivos de Medicina Veterinaria, 1998, 30, 1, pp 13-22
Abstract

An outbreak of white muscle disease (WMD) or nutritional muscular dystrophy was reported in a herd of 56 Red Friesian calves, where 18 calves aged 4 to 5 months died in a period of 45 days (Chile, date not given). The signs observed were tachypnoea, difficulty in walking, tachycardia, dilated...

Author(s)
Contreras, P. A.; Paredes, E.; Wittwer, F.; Carrillo, S.
Publisher
Facultad de Ciencias Veterinarias, Universidad del Zulia, Maracaibo, Venezuela
Citation
Revista Cientifica, Facultad de Ciencias Veterinarias, Universidad del Zulia, 2005, 15, 5, pp 401-405

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