Final answer:
The Aedes aegypti mosquito is the main vector for transmitting dengue fever, a disease prevalent in tropical areas with potentially serious health complications.
Step-by-step explanation:
The primary vector responsible for transmitting the pathogen causing dengue fever is the Aedes aegypti mosquito. This mosquito species is the most significant carrier, although A. albopictus can also serve as a vector. Dengue is prevalent in tropical regions and symptoms include high fever, severe joint pain, and a characteristic rash. In severe cases, it can progress to dengue hemorrhagic fever or dengue shock syndrome, with potentially fatal consequences. To mitigate the spread of dengue fever, vector control measures that target Aedes mosquito populations are the most effective strategy.