Typhoid in first week of illness is best diagnosed by:-
Serum widal test
Stool culture
Urine test
Blood culture
Laboratory diagnosis of typhoid : 'BASU' mnemonic Test of diagnosis Time of diagnosis Remarks Blood culture 1st week Mainstay of diagnosis Antibodies (widal test) 2nd week Moderate sensitivity & specificity Stool culture 3rd week Useful for carries Urine test 4th week Useful for carries
Systemic Bacteriology (Gram Positive Bacilli, Gram Negative Bacilli)