Relapsing malaria is due to

Options

A. Plasmodium folciparum and P. vivax
B. Plasmodium ovale and P. vivax
C. Plasmodium falciparum and P. ovele
D. P. falciparum only.

Answer

### Step-by-Step Solution:

1. **Understanding Malaria**: Malaria is a serious disease caused by parasites from the genus Plasmodium, which are transmitted to humans through the bite of infected female Anopheles mosquitoes.

2. **Types of Plasmodium**: There are several species of Plasmodium that cause malaria, including Plasmodium falciparum, Plasmodium vivax, and Plasmodium ovale. Each species can cause different types of malaria with varying severity.

3. **Definition of Relapsing Malaria**: Relapsing malaria refers to the recurrence of malaria symptoms after a patient has been treated and initially cured. This recurrence is due to the presence of dormant stages of the parasite in the liver.

4. **Identifying the Cause of Relapsing Malaria**: The specific species of Plasmodium responsible for relapsing malaria are Plasmodium vivax and Plasmodium ovale. These species can remain dormant in the liver and reactivate later, causing a relapse of malaria symptoms.

5. **Exclusion of Other Species**: Plasmodium falciparum, while it causes the most severe form of malaria, does not cause relapsing malaria. Therefore, it is not responsible for the recurrence of symptoms after treatment.

6. **Conclusion**: The correct answer to the question "Relapsing malaria is due to" is **Plasmodium vivax and Plasmodium ovale**.