Abstract
Summary
(1) Alkyl-dimethyl-benzylammonium chlorides (Zephiran chloride) in a concentration of 1 : 2,000 inactivates tetanus toxin. This effect takes place almost immediately. Zephiran chloride in a dilution of 1:20,000 fails to do so. (2) Human serum mixed with Zephiran chloride prior to the addition of tetanus toxin markedly interferes with the inactivation of toxin by this compound. Addition of serum to a mixture of 2kphiran chloride and tetanus toxin does not reactivate the toxin.
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