Systemic Bacteriology MCQs
46. Question
In the first week , typhoid is diagnosed by
Widal test
Stool culture
Urine culture
Blood culture
Answer
47. Question
In typhoid, Widal test detects
O antigen
H antigen
Vi antigen
Both O and H antigen
Answer
48. Question
Which is the following is true about the Widal reaction ?
Antibody to H Ag apears first and persists
Antibody to O Ag appears first and persists
Antibodies to H and O Ag appear simulatneously and persist
None of the above
Answer
49. Question
All of the following are true of Widal test EXCEPT
High titre in first sample is diagnostic
H antigen is specific for serotyping
Highly positve H titre is not dianostic
Maximum titre isreached in the third week
Answer
50. Question
TAB vaccination is a
Passive immunisation
Active immunisation
Neonatal immunisation
Combined immunisation
Answer