[Method of quantitative determination of vaccine activity against botulism of the mink]

Lyophilized vaccines prepared according to the method of Käber, modified by Achmarine, are utilized in the Soviet Union for the immunization of mink against botulin of the type C-alpha. These vaccines can be conserved more than a year at laboratory temperature without losing their efficacity. A Table allows a rapid and accurate determination of the quantity of vaccine to be injected into the mink to provide the same efficacity as a dose of standard vaccine.