Field's Tryptic digest Broth, HiVegâ„¢ (Tryptic Digest Broth, HiVegâ„¢) is recommended for cultivation of fastidious microorganisms. Supplementation of the medium with serum, blood or ascitic fluid, it supports the growth of fastidious organisms such as, Neisseria meningitides , Haemophilus influenzae , Streptococcus pneumoniae etc. Shepard et al described its use for culturing Streptococcus pneumoniae and Actinomycetes .