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Historical copper and manganese levels in cattle feeds in bavaria, germany


Clauss, Marcus; Sauter-Louis, C; Kienzle, E (2007). Historical copper and manganese levels in cattle feeds in bavaria, germany. Journal of Nutritional & Environmental Medicine, 16(1):69-74.

Abstract

Purpose. It has been repeatedly speculated that a deficiency in copper (Cu) or an excessive provision with dietary manganese (Mn) could play a role in spongiform encephalopathies [bovine (BSE) and others]. Therefore, commercial cattle feeds were screened for their content of these minerals.

Design. The historical development of the levels of Cu and Mn in Bavarian cattle feeds was evaluated and the levels compared with feeding recommendations.

Materials and methods. We report declared Cu and Mn contents from proprietary cattle feeds sold in Bavaria between 1978 and 1998.

Results. Mn contents in ruminant feeds were generally high, and there was a trend of increasing Mn levels in ruminant feeds between 1980 and 1990, which was in synchrony with an increase in internationally recommended Mn levels for ruminants. Recently, the recommendations have been modified again to lower levels.

Conclusion. Although no causative connection to the occurrence of BSE can be made, the practice of high Mn supplementation of proprietary cattle feeds should generally be reassessed.

Purpose. It has been repeatedly speculated that a deficiency in copper (Cu) or an excessive provision with dietary manganese (Mn) could play a role in spongiform encephalopathies [bovine (BSE) and others]. Therefore, commercial cattle feeds were screened for their content of these minerals.

Design. The historical development of the levels of Cu and Mn in Bavarian cattle feeds was evaluated and the levels compared with feeding recommendations.

Materials and methods. We report declared Cu and Mn contents from proprietary cattle feeds sold in Bavaria between 1978 and 1998.

Results. Mn contents in ruminant feeds were generally high, and there was a trend of increasing Mn levels in ruminant feeds between 1980 and 1990, which was in synchrony with an increase in internationally recommended Mn levels for ruminants. Recently, the recommendations have been modified again to lower levels.

Conclusion. Although no causative connection to the occurrence of BSE can be made, the practice of high Mn supplementation of proprietary cattle feeds should generally be reassessed.

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Additional indexing

Item Type:Journal Article, refereed, original work
Communities & Collections:05 Vetsuisse Faculty > Veterinary Clinic > Department of Small Animals
Dewey Decimal Classification:570 Life sciences; biology
630 Agriculture
Language:English
Date:2007
Deposited On:18 Nov 2008 12:20
Last Modified:07 Sep 2016 08:42
Publisher:Informa Healthcare
ISSN:1359-0847
Publisher DOI:10.1080/13590840601016353
Permanent URL: http://doi.org/10.5167/uzh-3498

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