Hemmes et al. 1960  1 part allantoic fluid and one part2% Difco peptone  ∼2.3 g L−1 (0.4 g L−1 K+, 0.9 g L−1 Na+,0.9 g L−1 Cl−)a  10 g L−1 peptone  -b  [8], [43]