George T., Here is a refence: Merril CR, ..., Adhya S "Long circulating bacteriophage as antibacterial agents" PNAS:93 pp3188-3192 1996 An interesting article. The work was done in mice with Lambda and P22. We study P22 assembly so the article caught our eye. If you have any further questions, e-mail me. tuffguy at uab.edu