抄録
Using the autolysate of bacteria which possess the antigens of subgroup E3, an antigenic transformation E1→E3 and E2→E3 has been observed. The transformation E1→E3 may also occur in the direction E1→E2→E3. Two strains of subgroup E4 were transformed by the process of E4→E2→E3. Antigen-transforming and bacteriolytic powers of the autolysate were demonstrated in parallel and it was supposed that O-3.10→O-3.15 and O-3.15→O-(3).(15).34 can be ascribed to two different bacteriophages.
When antigenic transformation was attempted on E3 strains with anti-O-34 or anti-O-15 serum, O-(3).(15).34→O-3.15 or O-(3).(15).34→O-3.10 was observed.
