Which one of the following diseases is caused by bacteria?

Why is Mary Mallon nicknamed as Typhoid Mary?

The toxin produced by tetanus germs affects:

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.

Statement $P$: $Salmonella$ $typhi$ are rod-shaped.
Statement $Q$: The incubation period of the bacteria is $1-3$ weeks.

Approximately how many people suffer from typhoid fever every year?