Haemozoin is a

Options

A. precursor of haemoglobin
B. toxin from Streptococcus
C. toxin from Plasmodium species
D. toxin from Haemophilus species

Explanation

**Step-by-Step Solution:**

1. **Understanding Hemozoin**: Hemozoin is a substance that is produced by the Plasmodium species, which is the parasite responsible for malaria. It is important to recognize that hemozoin is not a typical toxin but a byproduct of the digestion of hemoglobin by the parasite.

2. **Role of Plasmodium**: The Plasmodium species enters the human body as sporozoites through the bite of an infected mosquito. Once inside, these sporozoites travel to the liver, where they multiply.

3. **Rupture of Red Blood Cells (RBCs)**: After multiplying in the liver, the Plasmodium parasites enter the bloodstream and invade red blood cells. The multiplication within these cells leads to their rupture.

4. **Release of Hemozoin**: When the red blood cells rupture, they release hemozoin into the bloodstream. This substance is associated with the symptoms of malaria, such as chills and high fever, which occur in cycles.

5. **Identifying the Correct Option**: Given the options provided:
- Option 1: Precursor of hemoglobin - Incorrect, as hemozoin is not a precursor.
- Option 2: Toxin from Streptococcus - Incorrect, as this refers to different bacterial toxins.
- Option 3: Toxin from Plasmodium species - Correct, as hemozoin is indeed produced by Plasmodium.
- Option 4: Toxin from Hemophilus species - Incorrect, as this refers to another type of bacteria.

6. **Conclusion**: The correct answer is that hemozoin is a toxin produced by the Plasmodium species, which leads to the symptoms associated with malaria.

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