**Question:** All are manifestations of severe falciparum malaria, except:

A. **Hypoglycemia (low blood sugar)**
B. **Hypotension (low blood pressure)**
C. **Hyponatremia (low sodium levels)**
D. **Hypothermia (low body temperature)**

**Correct Answer: Hypothermia: [D] (low body temperature)**

**Core Concept:**
Severe falciparum malaria is a severe form of malaria caused by the Plasmodium falciparum parasite. It can lead to a range of complications due to the overwhelming systemic inflammation and organ dysfunction. The condition is characterized by:

- **Hypoglycemia (low blood sugar)**: This occurs due to increased glucose consumption, impaired gluconeogenesis, and increased glucose utilization by the parasite.
- **Hypotension (low blood pressure)**: Malaria can cause vasodilation, increased vascular permeability, and low cardiac output, leading to hypotension.
- **Hyponatremia (low sodium levels)**: Malaria can lead to increased volume expansion and impaired sodium excretion, resulting in hyponatremia.

**Why the Correct Answer is Right:**
Hypothermia, defined as a body temperature below 35°C, is not a typical manifestation of severe falciparum malaria. While hypothermia can occur in severe cases, it is generally associated with a variety of other conditions, such as sepsis, trauma, or other systemic inflammatory responses. In contrast, the other options are more consistent with the systemic inflammation and organ dysfunction seen in severe falciparum malaria.

**Why Each Wrong Option is Incorrect:**

**A. Hypoglycemia (low blood sugar)**: Hypoglycemia is a common manifestation of severe falciparum malaria due to increased glucose consumption by the parasite and impaired gluconeogenesis.

**B. Hypotension (low blood pressure)**: Malaria leads to vasodilation, increased vascular permeability, and low cardiac output, causing hypotension.

**C. Hyponatremia (low sodium levels)**: Malaria can cause volume expansion, leading to hyponatremia due to impaired sodium excretion.

**D. Hypothermia (low body temperature)**: While hypothermia can occur in severe cases of falciparum malaria, it is generally seen in conjunction with other conditions. In contrast, the other options are more specific to severe falciparum malaria and its systemic inflammation and organ dysfunction.