Which of the following is an example of a communicable disease?

• A. Tuberculosis
• B. Appendicitis
• C. Fracture
• D. Diabetes

Answer: (A)

Communicable diseases are infectious conditions that can be transmitted from one person to another (or from an animal or environment to a person) through various routes such as airborne droplets, direct contact, contaminated surfaces, or vectors. Tuberculosis fits this description because it is caused by the bacterium Mycobacterium tuberculosis and spreads through airborne droplets when someone with active TB coughs, sneezes, or speaks. This makes it contagious and a classic example of a communicable disease, highlighting why public health strategies focus on rapid case finding, isolation when needed, treatment, and contact tracing to prevent further transmission.

Appendicitis, on the other hand, is inflammation of the appendix and is not contagious, so it is not a communicable disease. A fracture is a physical injury, not an infection, and diabetes is a metabolic disorder that is not transmitted between people.