Safety and Immunogenicity Study of GSK's Clostridium Difficile Vaccine 2904545A When Administered in Healthy Adults Aged 18-45 Years and 50-70 Years

"Subjects in CDIFF Ag 18 - 45 Years and CDIFF Ag 50 - 70 Years Groups will receive 2 or 3 doses (0.5 mL each) of CDIFF Ag vaccine.~The vaccine will be administered intramuscularly in the deltoid, at a 0, 1-month dose interval. The third dose will be administered approximately 15 months after the second dose."

"Subjects in CDIFF Ag + AS01B 50 - 70 Years Group will receive 2 or 3 doses (0.5 mL each) of CDIFF Ag + AS01B vaccine.~The vaccine will be administered intramuscularly in the deltoid, at a 0, 1-month dose interval. The third dose will be administered approximately 15 months after the second dose."

Subjects will receive 2 doses (0.5 mL each) of Placebo, administered intramuscularly in the deltoid, at a 0, 1-month dose interval.