Which is the cause of Anthrax disease?

Primary lesion called chancre at the site of infection,is a characteristic symptom of . . . . . . disease.

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.

What is the shape of $Salmonella$ $typhi$?

Which disease is caused by $Haemophilus$ $influenzae$?

Which of the following is $NOT$ a characteristic symptom of typhoid fever?