The passage of lactic acid bacteria from silage into rumen fluid, in vitro studies

Journal of Dairy Science
Z G WeinbergMira Gamburg

Abstract

Inoculated silages sometimes improve cattle performance, possibly because of probiotic effects of lactic acid bacteria (LAB) silage inoculants. The cause of improved animal performance following feeding with inoculated silage is unclear. One issue in studying this phenomenon is to find out whether LAB pass from silage into the rumen fluid and survive in it. The purpose of the present study was to determine whether LAB from inoculated and uninoculated silages pass into the rumen fluid in vitro. Wheat and corn silages, uninoculated or inoculated with 1 of 10 commercial silage inoculant LAB, were prepared in glass jars. After ensiling, a 2.5-g silage sample was added to 25 mL of heat-sterilized or strained rumen fluid together with 5 g/L glucose, and incubated for 48 h at 39 degrees C. Analysis of the incubated rumen fluid included pH measurement, enumeration of LAB, and determination of lactic acid and volatile fatty acids (VFA). The pH of the rumen fluid decreased during incubation; both heat-sterilized and strained rumen fluid contained large numbers of LAB. The heat-sterilized rumen fluid contained lactic acid in addition to VFA, whereas the strained rumen fluid contained only VFA. The results indicate that LAB pass from silag...Continue Reading

References

May 1, 1989·The Journal of Applied Bacteriology·R Fuller
Aug 1, 1996·Journal of Dairy Science·P J Weimer
May 20, 2003·Journal of Applied Microbiology·Z G WeinbergP J Weimer
Aug 12, 2004·Applied Biochemistry and Biotechnology·Zwi G WeinbergMira Gamburg

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Citations

Oct 13, 2011·Food Additives & Contaminants. Part A, Chemistry, Analysis, Control, Exposure & Risk Assessment·C A DogiL Cavaglieri
Nov 3, 2021·Journal of Animal Physiology and Animal Nutrition·Xiaofeng ChangModinat Tolani Lambo

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