Abstract
A counterimmunoelectrophoretic (CIE) technique was developed to detect botulinic toxin type A, and the method was compared with the mouse bioassay. A 100 LD50 concentration was detected within 2 h. Crossed reactions were observed with antitoxins of types B and F. As regards other Clostridium species, precipitin lines were seen between C. sporogenes and antitoxin type A. Foodstuffs artificially contaminated with C. botulinum type A were assayed by means of CIE and mouse bioassay, without recording interference by substances normally contained in foodstuffs.
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