Mycolic acid is present in the cell wall of the pathogen causing:

Given below are two statements $:$
Statement-$I$ : Typhoid fever can be confirmed by the Widal test.
Statement-$II$ : Intestinal perforation and death may occur in severe cases of typhoid.
In the light of the above statements,choose the correct answer from the options given below $:$

Which disease is caused by the bacterium $Salmonella$ $typhi$?

In September $2001$,which of the following was used as a bioweapon agent in America?

'Bacillary dysentery' is caused by

Which one of the following antimicrobial drugs is suitable for the treatment of both tuberculosis and leprosy?