question_answer 43)

  Classify the following diseases as infections or non-infectious. (a) AIDS                             (b) Tuberculosis (c) Cholera                          (d) High blood pressure (e) Heart disease            (f) Pneumonia                    (g) Cancer

Answer:

  1.                   Difference between infectious and non-infectious disease are  

Infectious or Communicable Diseases	Non-infectious or Non-Communicable Diseases
They are caused by attack of pathogens. The diseases brought about by extrinsic or  external factors.  Infectious diseases can pass from diseased person to a healthy person, Transsmission of infection occurs through direct contact or some medium (air, water: vectors). Community hygiene can reduce the incidence of infections diseases e.g., cholera, tuberculosis (TB), pneumonia, Chickenpox.	They are not caused by pathogens. The diseases are mostly brought by intrinsic or internal factors. Non-infectious disease cannot pass from one person to another. Transmission is absent. However hereditary diseases are transmitted from parent to offspring. Community hygiene is ineffective in reducing the incidence of non-infectious diseases. e.g., high blood pressure, heart disease, cancer.