False staement regarding dengue fever –
**Core Concept**
Dengue fever is a mosquito-borne viral infection caused by the dengue virus, transmitted primarily through the bite of an infected Aedes species mosquito. The disease is characterized by a range of symptoms, from mild flu-like symptoms to severe hemorrhagic fever.
**Why the Correct Answer is Right**
The correct answer is related to the pathophysiology of dengue fever. Dengue virus infection leads to the activation of the immune system, resulting in the release of pro-inflammatory cytokines and the activation of complement system, which can cause vascular leakage and hemorrhage. The virus also causes the destruction of platelets, leading to thrombocytopenia.
**Why Each Wrong Option is Incorrect**
**Option A:** This option is incorrect because dengue fever is not caused by a bacterial infection. While bacterial infections can cause similar symptoms, dengue fever is a viral disease.
**Option B:** This option is incorrect because the primary mode of transmission of dengue fever is through the bite of an infected mosquito, not through contaminated food or water.
**Option C:** This option is incorrect because while dengue fever can cause severe hemorrhagic fever, it is not typically associated with the formation of abscesses.
**Clinical Pearl / High-Yield Fact**
Dengue fever is a leading cause of hospitalization and death in many tropical and subtropical regions, and its incidence has increased significantly in recent years due to climate change and urbanization.
**Correct Answer: B. Dengue fever is transmitted primarily through the bite of an infected Aedes species mosquito.**