When should you perform Widal test in a case of Typhoid?: (A) 1st week, (B) 2nd week, (C) 3rd week, (D) 4th week
Answer is B. Lab diagnosis for typhoid B - Blood culture - 1st week A - Agglutination Test - 2nd week S - Stool culture - 3rd week U - Urine culture - 4th week Widal test Highly sensitive but poorly specific Also biological false positive in - Infectious mono nucleosis Malaria SLE For Widal paired testing should be done