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 Graham, D. M. Articles by Nelson, F. E. Search for Related Content PubMed Articles by Graham, D. M. Articles by Nelson, F. E.

The Carrier State of Lactic Streptococcus Bacteriophage¹

Iowa Agricultural Experiment Station, Ames

ABSTRACT

Certain normally developing multiple-strain cultures of lactic streptococci found to carry bacteriophage have been investigated. The evidence suggests that there exists in these cultures an equilibrium between sensitive bacteria, resistant bacteria and the associated bacteriophage, resulting at each transfer in incomplete lysis of the sensitive strain, thereby continually providing substratum for the associated bacteriophage.

In a multiple-strain culture, the numerical relationships between the various strains are not stable; the relationship may change considerably from one transfer to the next. Presence of bacteriophage is one of the factors which may cause this type of shift.

¹ Journal paper no. J-2101 of the Iowa Agricultural Experiment Station, Ames, Project 1194

² Dairy Industry Supply Association fellow.

³ Present address: Dairy Husbandry Dept., Purdue University, Lafayette, Ind.