About the Authors

Jonathan A McCullers

To whom correspondence should be addressed. E-mail: jon.mccullers@stjude.org

Åsa Karlström
Amy R Iverson
Jutta M Loeffler
Vincent A Fischetti

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

JAM and VAF conceived and designed the experiments and wrote the paper. ARI and JML developed the pneumococcal strain and bacteriophage lytic enzyme, which were used in animal experiments conducted by JAM and AK.