Hello students, so after understanding the level of cause of disease. Let’s see the types of disease. Disease can be classified under two different ways. Based on the time for which the disease lasts and based on the cause of the disease.

Let’s understand these two types in detail.

Number one, based on the time for which the disease lasts which we have just discussed in the later modules. Diseases are of two types, acute and chronic. Acute diseases are those diseases which come and they go, very cute disease. Chronic disease those diseases which come they don’t go. They are with you for years and years and years affecting you, hurting you, making you very unhealthy. So, acute diseases are which lasts for only very short periods of time and there are no major signs, symptoms of these diseases and these diseases are called as acute disease. For example, common cold lasts for only a few days or a week. Chronic diseases aliments which can last for a long time even as much as our lifetime are called as chronic diseases. Example, elephantiasis is a very, very common disease in some parts of India, especially Kerala. It’s a very dangerous disease.

Based on the cause of the disease, again there are two types. Number one, infectious disease and number two, non-infectious disease. When I say infectious disease which means disease caused by some infectious agents that is microorganisms, it can be a bacteria, a virus, algae, fungi. A microorganism which is causing you a disease is called as infectious disease. Non-infectious disease these diseases are not caused by any infectious agent that is microorganism. It is caused due to internal, non-infectious reasons. For example, cancer, high blood pressure. Infectious disease, example influenza, amoebic dysentery. These disease require infection to affect you and you can spread this disease from one body to another. But you cannot spread these diseases because these disease are from inside they are not because of some bacteria or virus. Cancer is very dangerous disease in today’s life.

Infectious diseases which are caused by a germ, a pathogen, a microorganism, bacteria, virus, worm anything. Let’s see some common examples of these diseases. Organisms that can cause diseases are of different categories. Number one, viruses they are very dangerous and deadly. They can attack you and cause you very, very, very harmful diseases like common cold, influenza, dengue fever and the most dangerous disease of the world, AIDS, the famous HIV virus – Acquired Immuno Deficiency Syndrome caused by human immunodeficiency virus. The next one, bacteria – typhoid, cholera, again a very bad disease, tuberculosis caused by a bacteria, micro bacterium tuberculosis, anthrax, it’s an infection. Fungi, skin infection, you get white, white dots all over your skin because of these fungal infections. Protozoans, malaria again a very common disease because of unhygienic conditions, spread by a female anopheles mosquito. Kala-azar, again a very, very, very dangerous disease because of the parasites. Worms, intestinal worm infection, Ascaris, a very dangerous worm. Sometimes they get inside your body and they cause you Ascariasis, white, white worms inside your intestines moving, eating and hurting. Elephantiasis it’s a worm, Filarial worm which enters your skin and the part it enters it gets enlarged like an elephant. It’s called elephantiasis, very common in some parts of Kerala, dangerous disease. So, these are the infectious agents which can cause you the disease.