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Proportion of phage-insensitive and phage-sensitive cells within pure strains of lactic streptococci, and the influence of calcium

Published online by Cambridge University Press:  01 June 2009

Johannes Tesfaigzi  and
Roland Süssmuth
Johannes Tesfaigzi
Affiliation:
Institut für Mikrobiologie, Universität Hohenheim, Garbenstr. 30, D-7000 Stuttgart 70, FRG
Roland Süssmuth
Affiliation:
Institut für Mikrobiologie, Universität Hohenheim, Garbenstr. 30, D-7000 Stuttgart 70, FRG
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Extract

It is of industrial importance to investigate the interaction of Streptococcus lactis with phages. Although it has been long recognized that in phage–bacterial relationships the phage-carrier state can occur (Hunter, 1947), relatively little study has been done on this subject. The terras ‘phage-carrier state’ and ‘pseudolysogeny’ have been used synonymously to describe bacterial cultures which are persistently infected with a virus (Barksdale & Arden, 1974, Lawrence et al. 1976). The phagecarrier state differs from lysogenesis in that the bacteria are easily separated from the bacteriophage by a simple plating and re-isolation procedure (Graham et al. 1952). Süssmuth & Tayran (1986) showed that after lysis of one single strain, phage and phage-insensitive bacteria coexist. This work investigates the proportion of phage-insensitive bacteria remaining after lysis of other Str. lactis strains, the effect of calcium on this proportion, and the number of generations required to return to a normal sensitive population.

Type
Short Communications
Information
Journal of Dairy Research , Volume 56 , Issue 1 , February 1989 , pp. 151 - 154
Copyright
Copyright © Proprietors of Journal of Dairy Research 1989

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References

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