The Concentration of Antistreptococcus Plasmas of Different Antitoxic Potencies

Summary A method is described for the concentration of antistreptococcus plasma. The results obtained with this procedure in the concentration of a number of lots of plasma ranging in antitoxic potency from 100 to 1000 units per cubic centimeter are recorded. The average unit concentration is 5 with a 24-per-cent loss of antitoxin.