Airborne Disease Explained

An airborne disease is an illness that spreads through tiny droplets that remain in the air for a period of time. These droplets are usually produced when an infected person coughs, sneezes, talks, or laughs. Microorganisms like bacteria or viruses can travel through the air in these droplets and infect others if inhaled.

Analyzing Disease Transmission Options

Let's look at each option to see how it spreads:

1. Tuberculosis (TB)

Transmission: Tuberculosis is caused by bacteria called Mycobacterium tuberculosis. It is primarily an airborne disease. When someone with active TB in their lungs coughs, sneezes, or talks, they release tiny infectious droplets into the air. Other people can get infected by breathing in these droplets.

2. Malaria

Transmission: Malaria is caused by a parasite (Plasmodium) that spreads to people through the bites of infected female mosquitoes (specifically, Anopheles mosquitoes). This mode of transmission makes it a vector-borne disease, not an airborne one.

3. Dengue

Transmission: Dengue is a viral infection spread by infected mosquitoes, mainly the Aedes species. Similar to Malaria, Dengue is transmitted through mosquito bites, classifying it as a vector-borne disease.

4. Cholera

Transmission: Cholera is an intestinal infection caused by the bacterium Vibrio cholerae. It spreads mainly through contaminated water or food that has been infected by the feces of an infected person. This makes it a waterborne and foodborne disease.

Conclusion

Based on the analysis of the transmission methods:

• Tuberculosis spreads through the air via respiratory droplets.
• Malaria and Dengue are spread by mosquitoes (vector-borne).
• Cholera is spread through contaminated food and water (waterborne/foodborne).

Therefore, Tuberculosis is the correct example of an airborne disease among the choices provided.