HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS		QUICK SEARCH:   [advanced] Author: Keyword(s): Year:  Vol:  Page:

This Article Full Text (PDF) Alert me when this article is cited Alert me if a correction is posted Services Similar articles in this journal Similar articles in PubMed Alert me to new issues of the journal Download to citation manager Citing Articles Citing Articles via Google Scholar Google Scholar Articles by Braun, J. P. Articles by Rico, A. G. Search for Related Content PubMed PubMed Citation Articles by Braun, J. P. Articles by Rico, A. G.

Early Variations of Blood Plasma Gamma-Glutamyl Transferase in Newborn Calves — A Test of Colostrum Intake¹

Laboratoire de Biochimie, Ecole Nationala Vétérinaire, 31076 Toulouse Cédex, France

ABSTRACT

Fourteen newborn calves had low gamma-glutamyl transferase catalytic activity concentration in blood plasma (10 to 31 U/liter). Colostrum intake induced a dramatic increase of plasma gamma-glutamyl transferase activity, which was maximal on the 1st or 2nd day (370 to 5000 U/liter) after birth; then plasma enzyme activity slowly decreased and was stable about 100 U/liter on the 20th day. In two calves given either boiled or synthetic milk, plasma gamma-glutamyl transferase activity was not higher than 25 U/liter. Gamma-glutamyl transferase activity of blood plasma in newborn calves is an easy and inexpensive test of colostrum intake.

¹ This work was supported by the Institut National de la Recherche Agronomique, Paris, France.

² Laboratoire de Pathologie de la Reproduction, Ecole Nationale Vétérinaire, 31076 Toulouse Cedex, France.

³ Laboratoire de Biochemie II, Hôpital Purpan, 31052 Toulouse Cedex, France.