Question: what is the difference between salmonella typhi and salmonella paratyphi?
Answer: Serologically S. typhi is LPS antigen 09, 12, protein flagellar antigen Hd, and capsular polysaccharide antigen Vi positive. Salmonella paratyphi B is also known as S. schottmuelleri, and Salmonella paratyphi C as S.