<prompt> The bacteria frequently used as an immuno modulator is -Corynebacterium parvumMycobacterium marinumChromobacterium violasiumFlavobacterium meningosepticum  <response>: Ans. is a i.e., Corynebacterium parvum . Corynebacterium parum is frequently used as an immunomodulator. . It is a mixture of Propionibacterium species. 