Types of Diseases

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The study of diseases is called Pathology.
What is a disease?: A disease is a medical condition or disorder that negatively affects the structure or function of an organism. It leads to impaired physiological processes and often has characteristic symptoms.

Causes of Diseases: Diseases can arise due to various factors, including pathogens (e.g., viruses, bacteria, fungi, parasites), genetic mutations, environmental factors, lifestyle choices, or a combination of these factors.

Type of DiseaseExamples
Congenital diseasesHare lip, club foot, mongolism, spastic paraplegia
Hereditary diseasesHaemophilia, albinism
Dietary deficiency diseasesScurvy, rickets, beri-beri, anaemia
Hormonal diseasesGoitre, diabetes mellitus, acromegaly, dwarfism
Infectious diseases (VIRAL)AIDS, chicken pox, common cold, german measles, influenza, jaundice, measles, mumps, poliomyelitis, rabies, dengue fever, lassa fever
Infectious diseases (BACTERIAL)cholera, whooping cough, diptheria, gonorrhoea, leprosy, pneumonia, syphilis, tetanus, typhoid, tuberculosis, plague
Infectious diseases (FUNGAL)ringworm, atheletes’ foot, thrush
Infectious diseases (PROTOZOAN)malaria, amoebic dysentery, sleeping sickness, kala-azar
Infectious diseases (WORMS)filaria, tapeworm, pinworm
Degenerative diseasesgraying of hair, baldness, presbyopia, cataract, osteoarthritis, Parkinson’s disease, arteriosclerosis
Immunological diseaseshay fever, asthma, rheumatoid, arthritis, nettle rash
Neoplastic diseaseswarts, moles, cancer

Infectious Diseases


Select the right answer

1. Which of the following is a bacterial disease?

2. What kind of disease is osteoarthritis?

3. Which of the following is a hereditary disease?

4. Which of the following is a viral disease?

5. The causative agent of malaria is a -

6. Which of the following is NOT an infectious disease?

7. Which of the following is a fungal disease?

8. What kind of disease is arthritis?


Five of the following are infectious diseases.

Click on all possible answers


See also.....

Quiz on Diseases