Question

Which are various media of spreading the infectious disease?

Answer 1

Several species exist in and on our bodies. Normally, they're harmless or even helpful. But some species can cause disease under certain conditions. Disorders caused by species such as bacteria, viruses, fungi, or parasites are called infectious diseases.

Complete answer:
Infectious diseases are diseases caused by organisms such as bacteria, viruses, fungi, or parasites. In four primary ways, spreading infectious disease can occur:
In Airborne diseases, the microbial agents can move from an affected person to a healthy person through the air. It occurs through the little droplets thrown out by an infected person who sneezes or coughs and someone standing close by can breathe in these droplets, and microbes get a chance to start a new infection.
Water-borne diseases are a type of disease that is spread through water. If the excreta of someone suffering from an infectious gut disease (like cholera and amoebas) gets mixed with drinking water used by a healthy person living nearby. The infectious bacteria will enter into the body of new hosts through the water they drink and will get infected.
Sexually Transmitted diseases(Syphilis, Giardia intestinalis, AIDS) are transmitted by contact from one partner to another person. However, these diseases are not transmitted by ant casual physical contact. They can get spread through the blood to blood contact with Infected people or the infected mother to her baby during pregnancy or breastfeeding.
Vectors are the carrier of a disease or infection. A lot of animals which live with us carry disease. These animals carry infecting agents from an infected person to another host.

Note: Mosquitoes are the vector of a disease called malaria, dengue, Chikungunya, and many more. In many species of mosquitoes, the female needs highly nutritious food in the form of blood (only from warm-blooded organisms) to be able to lay mature eggs. In this way, they can transfer diseases from person to person.