Dear sir My widal test is negative and report shows that some thing like as Typhy o (1/20) = + , and (1/40) = +, and other are negative (1/80 , 1/160 ,1/320 ) Typhy H (1/20) = + , and (1/40) = +, and other are negative (1/80 , 1/160 ,1/320 ) Typhy AH (1/20) = + , and (1/40) = Negative, and other are negative (1/80 , 1/160 ,1/320 ) Typhy BH (1/20) = Negative , and (1/40) = Negative, and other are negative (1/80 , 1/160 ,1/320 ) What is the meaning of this widal test