Staff Publications

Staff Publications

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    'Staff publications' is the digital repository of Wageningen University & Research

    'Staff publications' contains references to publications authored by Wageningen University staff from 1976 onward.

    Publications authored by the staff of the Research Institutes are available from 1995 onwards.

    Full text documents are added when available. The database is updated daily and currently holds about 240,000 items, of which 72,000 in open access.

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Record number 370259
Title Minimizing the level of butyric acid bacteria spores in farm tank milk
Author(s) Vissers, M.M.M.; Driehuis, F.; Giffel, M.C.T.; Jong, P. de; Lankveld, J.M.G.
Source Journal of Dairy Science 90 (2007)7. - ISSN 0022-0302 - p. 3278 - 3285.
Department(s) Product Design and Quality Management Group
Publication type Refereed Article in a scientific journal
Publication year 2007
Keyword(s) clostridium-tyrobutyricum - aerobic deterioration - silage
Abstract A year-long survey of 24 dairy farms was conducted to determine the effects of farm management on the concentrations of butyric acid bacteria (BAB) spores in farm tank milk (FTM). The results were used to validate a control strategy derived from model simulations. The BAB spore concentrations were measured in samples of FTM, feces, bedding material, mixed corn and grass silage fed to cows in the barn, and soil. In addition, a questionnaire was used to gather farm management information such as bedding material used and teat cleaning method applied. The average BAB spore concentration in FTM was 2.7 log(10) spores/L, and 33% of the FTM samples exceeded a concentration of 3 log(10) spores/L. Control of the average spore concentration in mixed silage fed was the only aspect of farm management that was significantly related to the concentration of BAB spores in FTM. Farms that fed mixed silage with the lowest average BAB spore concentrations (3.4 log(10) spores/g) produced FTM with the lowest average concentration (2.1 log(10) spores/L). The efficiency of farm management in controlling the BAB spore concentration in FTM depended to a large extent on the ability of farmers to prevent incidents with elevated BAB spore concentrations in mixed silage (>5 log(10) spores/g) and not on the average BAB spore concentration in mixed silage across the year. The survey showed that farmers should aim for a concentration in mixed silage of less than 3 loglo spores/g and should prevent the concentration from exceeding 5 log(10) spores/g to ensure a concentration in FTM of less than 3 loglo spores/L. These results correspond with the previously reported model simulations.
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