Figure 10-4. Effect of amount of B. cereus enterotoxin in test preparation on development of reference line of precipitation1.
1A, inhibition (suppression) of reference line when 10 and 5 µg enterotoxin/ml, respectively, are used. B-E, precipitate patterns when successively less enterotoxin (test preparation) is used. F, typical formation of reference line of precipitation in slide test control system.