Filariasis is caused by parasitic worms such as Wuchereria bancrofti and Brugia malayi.

The smear method involves preparing a stained blood smear (often collected at night when parasites circulate in peripheral blood) and examining under a microscope.

Clinical uses include:

Detecting microfilariae in peripheral blood.

Confirming diagnosis of filarial infection.

Supporting epidemiological studies in endemic regions.

Considered a standard diagnostic method, especially in resource-limited settings.

Analyte: Presence of microfilariae (larval stage of filarial worms) in blood smear.

Normal Result: No microfilariae detected.

Abnormal Result: Microfilariae detected → confirms filarial infection.

Clinical Use:

Diagnoses filariasis accurately.

Differentiates species based on parasite morphology.

Guides treatment decisions and monitoring in endemic areas.