Hi, My Widal test shows Salmonella Typhi "O" : Dilutions in 1:160, Salmonella Typhi "H" : Dilutions in 1:80, Salmonella Para Typhi "AH" : Dilutions in 1:20, Salmonella Para Typhi "BH" : Dilutions in 1:20. What it means, is there viral infection still exists? Please suggest me.. Thanks in Advance.