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

Which test is used for the diagnosis of tuberculosis?

The incubation period of $Salmonella$ $typhi$ is.........

Which of the following sets of diseases is caused by bacteria?

Assertion: $Escherichia$ $coli$,$Shigella$ $sp.$ and $Salmonella$ $sp.$ are all responsible for diarrhoeal diseases.
Reason: Dehydration is common to all types of diarrhoeal diseases and adequate supply of fluids and electrolytes should be ensured.

Black rot of mustard is caused by