Table 2.

Comparison of vacuolating activities of Amazonia and vaccine strains derived from the El Tor strain N16961

FractionDilution yielding maximum vacuolating activity
FG1066 (Amazonia)N16961 (El Tor, wild type)JBK56 (CT Apr)JBK70 (CTHgr)CVD104 (CT HlyA)
Supernatant1/6401/201/201/20<1/20
Concentrate1/51201/3201/3201/320<1/20