Acknowledgements

We are grateful to Dr. S. Bloch, Dr. B. Nejman-Faleńczyk and Prof. G. Wegrzyn from the University of Gdansk, Poland for their help in establishing the procedures of phage φ24B cultivation in our lab and to Dr. E. M. Kutter from the Evergreen state college, Olympia, USA, for critical reading and linguistic correction of the early version of the manuscript.