Haemophilus influenzae is responsible for which of the following diseases?
Answer & explanation
Correct answer: option 2
The correct answer is Option (2) → Pneumonia
Pneumonia is a bacterial disease of the lungs. It is caused by bacteria such as Streptococcus pneumoniae and Haemophilus influenzae. They infect the alveoli (air sacs) of the lungs. The alveoli fill with fluid, which causes severe problems in breathing. A healthy person gets infected by breathing in droplets released by an infected person.
(1) Typhoid fever — Incorrect. Typhoid is caused by Salmonella typhi. It spreads through contaminated food and water.
(2) Pneumonia — Correct. Haemophilus influenzae is one of the bacteria that cause pneumonia.
(3) Whooping cough — Incorrect. Whooping cough is caused by a different bacterium, Bordetella pertussis.
(4) Malaria — Incorrect. Malaria is caused by a protozoan, Plasmodium, spread by the female Anopheles mosquito. It is not caused by a bacterium.
NCERT Extract:
Common Diseases in Humans – …
