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Abstract

Chile is keen to expand exports of dairy products and so has introduced regulations to improve milk quality through financial incentives. Penalties for BMSCC start at 250 000 cells/ml and go up to minus 22% of the milk price at >750 000 cells/ml and penalties for TBC start at 20 000 cfu/ml and...

Author(s)
Schaik, G. van; Green, L. E.; Guzmán, D.; Esparza, H.; Tadich, N.
Publisher
Wageningen Academic Publishers, Wageningen, Netherlands
Citation
Mastitis in dairy production: current knowledge and future solutions, 2005, pp 242-247
Abstract

The aim of this study was to determine the risk factors related to the prevalence of foot lesions in 50 dairy farms in 3 provinces (Valdivia, Osorno and Llanquihue) of the 10th Region, Chile. Each farm was visited once between April and July 2004. During each visit, all lactating cows were observed ...

Author(s)
Hettich, E.; Hinostroza, M. F.; Schaik, G. van; Tadich, N.
Publisher
Facultad de Ciencias Veterinarias, Universidad Austral de Chile, Valdivia, Chile
Citation
Archivos de Medicina Veterinaria, 2007, 39, 3, pp 247-253
Abstract

In Chile, Mycobacterium avium subsp. paratuberculosis (Map) has been isolated on several occasions and clinical cases have been reported. Nevertheless, diagnostic tests have not yet been validated for this agent in the Chilean setting. The objective of the study was to validate a commercial ELISA...

Author(s)
Schaik, G. van; Haro, F.; Mella, A.; Kruze, J.
Publisher
Elsevier, Amsterdam, Netherlands
Citation
Preventive Veterinary Medicine, 2007, 79, 1, pp 59-69
Abstract

Two tests are used on a regular basis to detect Mycobacterium avium subsp. paratuberculosis (Map): ELISA and fecal culture. Fecal culture is considered more sensitive and specific but is costly and requires 3-4 months for results. Pooling of fecal samples of individual animals may reduce the high...

Author(s)
Schaik, G. van; Pradenas F., M.; Mella N., A.; Kruze V., J.
Publisher
Elsevier, Amsterdam, Netherlands
Citation
Preventive Veterinary Medicine, 2007, 82, 1/2, pp 159-165
Abstract

In Chile, Mycobacterium avium subsp. paratuberculosis (Map) was isolated on several occasions and clinical cases were reported. Nevertheless, diagnostic tests were not yet validated. The objective of the study was to validate a commercial ELISA to detect Map shedding dairy cows in management...

Author(s)
Schaik, G. van; Haro, F.; Mella, A.; Kruze, J.
Publisher
Society for Veterinary Epidemiology and Preventive Medicine, Roslin, UK
Citation
Society for Veterinary Epidemiology and Preventive Medicine. Proceedings of a meeting held at Exeter, UK, 29-31 March 2006, 2006, pp 141-151
Abstract

The objective of this study was to determine the effect of two transport journeys (3 and 16 h) and four lairage times at the abattoir (3, 6, 12 and 24 h) on some stress indicators in steers to validate the current Chilean legislation of a minimum lairage period of 12 h for cattle arriving at...

Author(s)
Tadich, N.; Gallo, C.; Bustamante, H.; Schwerter, M.; Schaik, G. van
Publisher
Elsevier, Amsterdam, Netherlands
Citation
Livestock Production Science, 2005, 93, 3, pp 223-233
Abstract

In order to determine the prevalence of lameness, the type of the lesions and the degree of cow's lameness a study was carried out in 50 dairy farms from three provinces (Valdivia, Osorno and Llanquihue) of the Xth Región (Southern Chile). The farms were visited once between April and July, 2003....

Author(s)
Tadich, N. A.; Hettich, E.; Schaik, G. van
Publisher
Facultad de Ciencias Veterinarias, Universidad Austral de Chile, Valdivia, Chile
Citation
Archivos de Medicina Veterinaria, 2005, 37, 1, pp 29-36
Abstract

AIM: To determine the effect of grazing pasture that had a low selenium (Se) concentration on serum concentrations of triiodothyronine (T3) and thyroxine (T4), and erythrocyte glutathione peroxidase (GSH-Px) activity in dairy cows. METHODS: Forty pregnant Friesian cows were grazed on pasture that...

Author(s)
Contreras, P. A.; Wittwer, F.; Matamoros, R.; Mayorga, I. M.; Schaik, G. van
Publisher
New Zealand Veterinary Association, Wellington, New Zealand
Citation
New Zealand Veterinary Journal, 2005, 53, 1, pp 77-80
Abstract

This study was carried out to investigate the principal management factors that influenced the bulk milk somatic cell count (BMSCC) and total bacterial count (TBC) of smallholder dairy farms in the 10th Region of Chile. A total of 150 smallholder milk producers were randomly selected from 42 milk...

Author(s)
Schaik, G. van; Green, L. E.; Guzmán, D.; Esparza, H.; Tadich, N.
Publisher
Society for Veterinary Epidemiology and Preventive Medicine, Roslin, UK
Citation
Society for Veterinary Epidemiology and Preventive Medicine. Proceedings of a meeting held at the Martigny, Switzerland on the 24th-26th March 2004, 2004, pp 101-110
Abstract

We investigated the principal management factors that influenced bulk milk somatic cell count (BMSCC) and total bacterial count (TBC) of smallholder dairy farms in the 10th region of Chile. One hundred and fifty smallholder milk producers were selected randomly from 42 milk collection centres...

Author(s)
Schaik, G. van; Green, L. E.; Guzmán, D.; Esparza, H.; Tadich, N.
Publisher
Elsevier, Amsterdam, Netherlands
Citation
Preventive Veterinary Medicine, 2005, 67, 1, pp 1-17

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