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The use of antibiotics is not permitted in Switzerland; moreover, no other medication exists to combat European foul brood. Hives with symptoms must therefore be destroyed in order to limit the outbreak, and the contaminated material must be sanitised. Since prevention is the best cure, early detection is desirable. Numerous studies have been undertaken and documents have been created at the Swiss Bee Research Centre and elsewhere to draw the attention of beekeepers to these problems and inform them about the causes and the control measures to be implemented.

Merkblatt zur erkennung von Bienenbrutkrankheiten (German (PDF, 357 kB, 18.10.2017) and French (PDF, 226 kB, 02.02.2017))
M. Tschumi (2011)

Quantitative analysis of menaquinones (vitamin K2) in various types of cheese from Switzerland.

Institutional Repository Agroscope

Walther B., Guggisberg D., Schmidt R., Portmann R., Risse M.C., Badertscher R., Chollet M.

Quantitative analysis of menaquinones (vitamin K2) in various types of cheese from Switzerland.

International Dairy Journal, 112, 2021, Article 104853.

Résumé:

Vitamin K2 (MKn) has been assessed in some varieties of cheese, but data are limited and do not account for factors like seasonality that affect MKn. To investigate variation of MKn content in cheese, we assayed 121 cheese samples from 10 cheese varieties made from cows’, goats’, and ewes’ milk throughout an entire production year. The concentrations of menaquinone (MK) species MK-4 to MK-10 were determined using high performance liquid chromatography. MKn in the cheese ranged from 23 to 1312 μg kg -1. An important determinant of MKn content was the bacterial strains used in the starter cultures. Scalding temperature also influenced MKn content by affecting the survival of MKn-producing strains. Seasonal variability was observed for some cheese varieties, while fat content negatively correlated with total MKn. Based on our results, in Switzerland 13–17% of the recommended daily intake for MKn is met by cheese consumption.

ISSN Print 0958-6946
ISSN en ligne: 0958-6946
Digital Object Identifier (DOI): https://doi.org/10.1016/j.idairyj.2020.104853
ID publication (Code web): 44496 Envoyer par e-mail

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Quantitative analysis of menaquinones (vitamin K2) in various types of cheese from Switzerland.