JDS
HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS
QUICK SEARCH:   [advanced]


     

Journal of Dairy Science Vol. 39 No. 8 1149-1155
© 1956 by American Dairy Science Association ®
This Article
Right arrow Full Text (PDF)
Right arrow Alert me when this article is cited
Right arrow Alert me if a correction is posted
Services
Right arrow Similar articles in this journal
Right arrow Alert me to new issues of the journal
Right arrow Download to citation manager
Right arrow reprints & permissions
Citing Articles
Right arrow Citing Articles via Google Scholar
Google Scholar
Right arrow Articles by Lassiter, C. A.
Right arrow Articles by Rust, J. W.
Right arrow Search for Related Content
PubMed
Right arrow Articles by Lassiter, C. A.
Right arrow Articles by Rust, J. W.

Comparative Effects of Crystalline Antibiotics and Crude Antibiotic Supplements (Aureomycin and Terramycin) on the Growth and Metabolism of Young Dairy Calves1

C. A. Lassiter2, L. D. Brown and J. W. Rust

Dairy Section, University of Kentucky, Lexington

ABSTRACT

Research work concerning the value of feeding antibiotics to young dairy calves recently reviewed by Lassiter (5) indicates that both aureomycin and terramycin improve the growth rate, increase feed efficiency, and reduce the incidence of scours in young dairy calves. The relative feeding value of crystalline antibiotics as compared with the antibiotic supplement, however, has not been definitely determined (2, 3, 9, 10).

Loosli and Wallace (8) observed that crystalline aureomycin produced a growth response similar to that secured from an APF supplement that contained aureomycin. Rusoff et al. (9, 10) observed similar results with both forms of aureomycin. Bloom and Knodt (3), however, observed in feeding trials involving both crystalline aureomycin and aureomycin supplements at three different levels of antibiotic feeding that in general the calves that were fed the crude antibiotic supplements grew at a slightly faster rate than calves fed the same amount of crystalline aureomycin. Bartley et al. (2) fed calves two levels of aureomycin, 45 and 90 mg., daily from both crystalline aiireomycin and the aureomycin supplement, Aurofac.

FOOTNOTES

1 The investigation reported in this paper is in connection with a project of the Kentucky-Agricultural Experiment Station and is published by permission of the Director.

2 Present address: Michigan State University, East Lansing.






HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS
Copyright © 1956 by the American Dairy Science Association ®.