Which of these symptoms is caused by the entry of sporozoites ?

Options

A. Oedema (swelling) and thickening of skin and underlying tissues especially in the legs and genitals .
B. Characteristics fever causing a feeling of cold, chills and rigor followed by increase in temperature and finally causing profuse sweating
C. Vomiting, indigestion and diarrhea, gastrointestinal pain and discomfort
D. Abscess in the liver

Answer

To solve the question regarding which symptom is caused by the entry of sporozoites, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding Sporozoites**:
- Sporozoites are the infectious form of the malaria parasite (Plasmodium) that is transmitted to humans through the bite of an infected Anopheles mosquito.

2. **Identifying Symptoms Associated with Malaria**:
- The symptoms of malaria typically include fever, chills, sweating, headaches, and body aches. This is due to the lifecycle of the parasite in the human body, where it invades liver cells and then red blood cells.

3. **Analyzing the Options**:
- **Option A**: Oedema (swelling and thickening of skin) is associated with conditions like elephantiasis, not malaria.
- **Option B**: Characteristic fever with chills, rigor, and profuse sweating aligns with malaria symptoms and is indeed caused by the entry of sporozoites.
- **Option C**: Symptoms like vomiting, diarrhea, and gastrointestinal pain are associated with typhoid fever, not malaria.

4. **Conclusion**:
- Based on the analysis of the options, the symptom caused by the entry of sporozoites is **Option B**: Characteristic fever causing a feeling of cold, chills, and rigor followed by an increase in temperature and finally causing profuse sweating.

### Final Answer:
**Option B**: Characteristic fever causing a feeling of cold, chills, and rigor followed by an increase in temperature and finally causing profuse sweating.

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