title: Protozoan, bacterial, and volatile Fatty Acid changes associated with feeding tylosin.
abstract: Tylosin was fed to two of six wethers for 79 days, to a second two for only 28 days, and not at all to a third pair (controls). The addition of tylosin to the daily feed resulted in a rapid twofold increase in protozoal concentration and a change in the composition or characteristics, or both, of the bacterial population. The results indicate that the bacterial population was modified to the extent of about 80%. Total acid concentrations were initially depressed but appeared to be greater than those in control animals at the termination of the experiment. Deletion of tylosin from the ration resulted in a rapid decrease in protozoal concentrations, whereas changes in the bacterial population did not occur for a further 30 days.
authors.affiliation: Institute of Nutrition and Food Technology, Ohio State University, Columbus, Ohio 43210.
authors.forename: N
authors.initials: N
authors.lastname: Satapathy
authors.forename: D B
authors.initials: DB
authors.lastname: Purser