Question

Plague is spread by
(a) Pediculus
(b) Cimex
(c) Aedes
(d) Xenopsylla

Answer 1

Hint: It is a zoonotic disease with severe clinical presentations caused by the bacterium Yersinia pestis. The animal reservoir, the bacteria, and the vector in a given area are collectively called a plague natural focus. All human beings can become infected by being bitten by infected fleas which direct contact with infected fluids or tissue from a host inhalation of the respiratory droplets.

Complete step by step answer:
-Earlier it was named Pasteurella pestis consisting of a short, rod-shaped, gram-negative bacteria that causes the disease Bubonic plague.
- Basically, it is a disease of rodents (squirrels, rabbits, rats) that is transmitted to humans by a  bite of Rat Flea/Xenopsylla. This will happen when the flea has fed on an infected rodent and it bites a human.

- It can also be spread by person-to-person contact through aerosol inhalation.
- So, Yersinia pestis is a causal agent of the Bubonic Plague), and it is transmitted by Rat Flea/Xenopsylla.
So, the correct answer is ‘ Xenopsylla’.

Additional information: Plague is divided into three main types:
1. Bubonic,
2. Septicemic
3. Pneumonic — depending on which part of your body is involved.
Bubonic plague
The bubonic plague is a very common type of disease. It's named after the swollen lymph nodes (buboes) that commonly create in the first week after you become contaminated.
Septicemic plague
Septicemic plague happens when plague microbes increase in your circulatory system.
Pneumonic plague
Pneumonic plague influences the lungs. It's the least variety of plague however the most dangerous in light of the fact that it very well can be spread from individual to individual by means of cough droplet.

Note: Known as the Black Death during medical eras, today plague happens in less than 5,000 individuals per year around the world. It very well may be fatal if not treated instantly with antibiotics. The most common type of plague brings about swollen and delicate lymph hubs called buboes in the crotch, armpits, or neck. The most extraordinary and deadliest type of plague influences the lungs, and it very well may be spread from individual to individual.