There are different types of diseases, which causes a severe effect on the structure or function of all or part of an organism.
In our previous chapter, we have learned about the different types of nutritional diseases. In this chapter, we will be learning about infectious, non-infectious and other contagious diseases.
Infectious Diseases and Non-infectious Diseases
Based on the causes, symptoms, treatment and preventions, the diseases are categorised into different types.
Infectious diseases and Non-infectious diseases are two types of diseases, and are classified based on their ways of spreading.
Infectious Diseases
Infectious diseases are diseases, which spread from one person to another. These diseases can spread from air, infected food and water. Some diseases are spread by mosquitoes and flies, while bacteria and viruses spread infectious diseases.
Cold, flu, cholera, mumps, polio, h.i.v./aids, measles, tetanus, tuberculosis, itching, malaria, dengue, eczema, irritation, elephantiasis, diarrhoea, dysentery, typhoid, etc., are examples of infectious diseases.
Non-infectious Diseases
Non-infectious diseases are diseases, which do not spread from one person to another. These diseases can be caused by allergies, nutritional deficiency, smoking, etc. There are many different reasons for non-infectious diseases.
Cancer, cough, asthma, gout, anaemia, goitre, heart attack or stroke, epilepsy, cataract, glaucoma, allergy, abdominal ulcer, anaemia, jaundice and diabetes are examples of non-infectious diseases.
Contagious Diseases
Apart from infectious and non-infectious diseases, some common diseases such as cholera, typhoid, diarrhoea, and dysentery are caused by infected or contaminated water and food.
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