How diphtheria caused?

Diphtheria is caused by the bacterium *Corynebacterium diphtheria*, which is spread through contact with respiratory droplets or contaminated surfaces.

* The bacteria can enter the body through the nose, mouth, or eyes.

* Once inside the body, the bacteria produce a toxin that damages the cells of the respiratory system, causing symptoms such as a sore throat, hoarseness, difficulty swallowing, and a thick, gray membrane that forms in the back of the throat.

* The toxin can also cause damage to the heart, kidneys, and nervous system.

Diphtheria is spread through contact with an infected person's respiratory droplets, which can be spread through coughing, sneezing, or talking. It can also be spread through contact with contaminated objects, such as toys, doorknobs, or surfaces that have been touched by an infected person.

Diphtheria is a serious infection that can be fatal if not treated promptly. Symptoms usually begin 2-5 days after exposure to the bacteria. If you think you or someone you know may have diphtheria, it's important to seek medical attention immediately.

There is a vaccine available to prevent diphtheria, and it is recommended that everyone be vaccinated. The vaccine is usually given as part of the DTaP vaccine, which also protects against tetanus and pertussis.