Wow, always thought this was just a theory by the Rife guys:
Cystic Form of Bb: An Introduction: These abstracts shed light on how Borrelia burgdorferi (Bb) is able to survive antibiotic therapy, and on a primary mechanism underlying post-treatment clinical relapses. They document the ability of Bb to change from a spirochete-form to a "cystic" or coccoid form in response to adverse environmental conditions. The cystic forms can later regenerate spirochetes. 17 pages. Last modified: September 2003