n :  the exhibition of residual toxicity by a mixture of toxin and antitoxin in which the toxin has been added in several increments to an amount of antitoxin sufficient to completely neutralize it if it had been added as a single increment - called also Danysz effect 
 
Danysz, Jean (1860-1928), Polish-French pathologist. Danysz reported on the Danysz phenomenon in an 1899 article on toxins and antitoxins. He is also known for two other achievements: the isolation in 1900 of the bacterium (Salmonella typhimurium) that is the most frequent cause of human food poisoning, and the first use of radium in treating malignant diseases in 1903.
 
 
 
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