All is true about malaria, except –
**Core Concept**
Malaria is a mosquito-borne infectious disease caused by Plasmodium parasites, transmitted through the bite of an infected Anopheles mosquito. The disease affects millions worldwide, with varying severity depending on the parasite species and host factors.
**Why the Correct Answer is Right**
The correct answer(s) will highlight one or more of the following characteristics of malaria: parasite lifecycle, transmission, clinical manifestations, or treatment. The parasite lifecycle involves two hosts: the human and the mosquito. In humans, the parasite multiplies within red blood cells, causing hemolysis and anemia. Treatment typically involves antimalarial drugs, such as chloroquine or artemisinin-based combination therapies.
**Why Each Wrong Option is Incorrect**
**Option A:** Malaria is caused by a viral infection. This is incorrect because malaria is caused by Plasmodium parasites, not viruses.
**Option B:** The primary vector for malaria transmission is the Culex mosquito. This is incorrect because Anopheles mosquitoes are the primary vectors for malaria transmission.
**Option C:** Malaria can be transmitted through blood transfusions. This is incorrect because while malaria can be transmitted through blood transfusions, it is not the primary mode of transmission.
**Option D:** Malaria is not a significant public health concern in the United States. This is incorrect because while malaria is relatively rare in the United States, it is still a significant public health concern in many parts of the world.
**Clinical Pearl / High-Yield Fact**
Malaria is a classic example of a disease with a complex lifecycle, involving multiple hosts and transmission stages. Understanding the parasite lifecycle is crucial for effective treatment and prevention strategies.
**Correct Answer: D. Malaria is not a significant public health concern in the United States.**