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 Alert me to new issues of the journal Download to citation manager Citing Articles Citing Articles via Google Scholar Google Scholar Articles by Kesler, E. M. Articles by Knodt, C. B. Search for Related Content PubMed Articles by Kesler, E. M. Articles by Knodt, C. B.

Selection of Sample in Determination of the Streptococcal Flora of the Udder¹

The Pennsylvania Agricultural Experiment Station

ABSTRACT

The streptococcal flora and the leucocyte content of the quarters of 47 dairy cows were determined for five different stages of milking. These stages were as follows: first 15-ml. drawn, second 15-ml., third 15-ml., mid-milk and strippings. Little difference was noted between the strict foremilk and the second 15-ml. sample. It would seem that either would be useful in a determination of the streptococcal flora. On the other hand, not all quarters found shedding Str.agalactiae by the use of these samples would have been detected had either mid-milk or strippings been used as the basis of the tests. The presence of long chain streptococci other than Str.agalactiae likewise would have been missed. Excessive numbers of leucocytes appeared more often and in larger numbers in the later samples.

¹ Authorized for publication as Paper no. 1507 in the journal series of the Pennsylvania Agricultural Experiment Station.