Typhoid in first week of illness is best diagnosed by:-
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
Serum widal test
Stool culture
Urine test
Blood culture
Systemic Bacteriology (Gram Positive Bacilli, Gram Negative Bacilli)