Diagnosis
To diagnose lymphatic filariasis, healthcare providers need to examine a blood sample. They may use:
Microscopic testing: Providers may view your blood sample under a microscope. The microscope allows them to see if your blood has any filarial worms. Filarial worms are nocturnally periodic, meaning they only move in your blood at nighttime. Because of this, you may need to get your blood drawn at night.
Antibody testing: Providers may measure your blood sample for antibodies. Antibodies are organisms that your body creates in response to an infection. You can have this test during the day.