Leprosy is communicated by

Which of the following is a serious lung 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.

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

$Pasteurella/Yersinia$ $pestis$ (causal agent of Bubonic Plague) is transmitted by:

Which disease is commonly observed in the elderly?