One unit of diphtheria antitoxin was defined as the smallest amount of antitoxin required to neutralise ?
Ans. is 'a' i.e., 100 MLD of toxin . Minimum lethal dose (MLD) of the diphtheria toxin is defined as the least amount of the toxin required to kill a guinea pig weighing 250 gm within 96 hours after subcutaneous inoculation. . One unit of antitoxin was defined as the smallest amount of antitoxin required to neutralize 100 MLD of toxin.
100 MLD of toxin
200 MLD of toxin
300 MLD of toxin
400 MLD of toxin