How is filariasis primarily transmitted according to nursing knowledge?

Filariasis is primarily transmitted through the bite of specific mosquitoes that are infected with filarial larvae, which are the embryos of the worms responsible for the disease. These larvae enter the human bloodstream when an infected mosquito bites an individual, leading to the potential development of filariasis in the host. This mode of transmission highlights the critical role of insect vectors in the spread of this parasitic disease.

Understanding this transmission route is essential for effective public health interventions, as it emphasizes the need for controlling mosquito populations and protecting individuals from bites to prevent the spread of filariasis. The other options, which suggest alternative transmission routes such as contaminated water, undercooked meat, or direct contact with infected individuals, do not apply to the life cycle and transmission mechanics of the filarial worms.