A patient with 14 days of fever is suspected of having typhoid; what investigation should be done:: (A) Blood culture, (B) Widal, (C) Stool culture, (D) Urine culture
Answer is B. Widal test is the investigation of choice in 3rd week. Ref: Text Book of Microbilogy By Ananthanarayan, 6th Edition, Page 275 and 8th Edition, Page 296 ; Harrison's Principles of Internal Medicine, 15th Edition, Page 972 ; Essentials of Pediatric By OP Ghai, 3rd Edition