Answer: Streptococcus pneumoniae.
- A Streptococcus pneumoniae
- B Plasmodium vivax
- C Rhino virus
- D Entamoeba histolytica
Correct answer: A. Streptococcus pneumoniae
Explanation: Pneumonia is caused by Streptococcus pneumoniae (and Haemophilus influenzae). It infects the alveoli, which fill with fluid, causing breathing difficulty.
The Plasmodium parasite needs both hosts: the female Anopheles mosquito injects sporozoites while biting (infecting the human liver and RBCs, causing the malaria fever cycle), then picks up gametocytes from an infected person's blood, completing the parasite's sexual stage inside the mosquito.
Concept context
Pathogens, infectious diseases, non-infectious diseases, drugs, cancer, and public health. High NEET importance.