[El Tor vibrios with different enteropathogenicities].
The authors summed up the results of study of enteropathogenicity of 270 strains of the El Tor vibrios isolated the last 11 years. Over 2 000 nursling rabbits were used. El Tor vibrios were divided by their enteropathogenic properties into three categories: 1) the highly enteropathogenic (cholerogenic) ones causing the death of all the biotest nursling rabbits with a characteristic syndrome of cholerogenicity, and failing to lyse sheep erythrocytes; 2) enteropathogenic ones, causing death of some of the biotest animals without any characteristic cholerogenicity syndrome, but with the intestinal lesions; strains of this category are hemolytic; 3) nonenteropathogenic, causing no death of the animals even when their high doses are administered; these bibrios are hemolytic (cause lysis of sheep red blood cells).