- Sreekumar E, Das S. Mycobacterium phlei as an oral immunomodulator with Newcastle disease vaccine. Indian J Exp Biol. 2001;39:989-92 pubmed..The results indicate that M. phlei favours a CMI response to orally administered live ND F vaccine. It may be of potential use in enhancing CMI against vaccines and a cheaper alternative to costlier recombinant cytokines. ..