Widal test is used for susceptibility of
Malaria
Cholera
Yellow fever
Typhoid
Identify the correct pair representing the causative agent of typhoid fever and the confirmatory test for typhoid.
$A$ : Typhoid carriers may be cured by surgical removal of their gall bladder.
$R$ : The disease germs remain concentrated in it.
Why Mary Mallon is nicknamed as Typhoid Mary ?
Infection of pneumonia occurs due to
The disease ‘pneumonia’ is caused by