Question

Which one of the following diseases is not caused by bacteria?

• A. Typhoid
• B. Anthrax
• C. Tuberculosis
• D. Malaria

Answer 1

The correct option is D

Malaria

The correct option is D.

Explanation of correct option:

1. Bacteria are single-celled microscopic organisms.
2. Several strains of bacteria are not harmful, like the bacteria found in the gut of humans helps in digestion and produce vitamins.
3. However, some bacteria result in illness in humans, which can be very dangerous.
4. Malaria is not a bacterial illness; rather, it is brought on by a parasitic protozoan microbe known as Plasmodium, which is transmitted through the bite of an infected female Anopheles mosquito.
5. Individuals suffering from malaria usually experience chills, fever, and flu-like illnesses.

Explanation of incorrect options:

Option A:

1. Typhoid is a bacterial disease, which is not transmitted via mosquitoes.
2. The bacteria, which results in typhoid is Salmonella typhi.
3. The disease generally spreads via the consumption of contaminated water or food.
4. If the person consumes or drinks something, which is infested with the bacteria, the person might suffer from the disease.
5. The organs affected by the disease are the spleen, liver, and muscles.

Option B:

1. An extremely infectious disease resulting due to rod-shaped, gram-positive bacteria called Bacillus anthracis is Anthrax.
2. It takes place naturally in soil and usually affects wild and domestic animals around the globe.
3. Individuals get sick with the disease when they come in contact with contaminated animal products or animals.
4. In humans, an extreme form of anthrax leads to the destruction of multiple organ systems, and swelling of the fluid and membranes enveloping the spinal cord and the brain.

Option C:

1. Tuberculosis is a bacterial disease resulting due to Mycobacterium tuberculosis.
2. It is a contagious infection, which generally attacks the lungs or other tissues.
3. The bacteria, which cause the disease are spread from one individual to another via tiny droplets discharged into the air via sneezes and coughs.

Final answer: Malaria is not caused by bacteria.