Description
A 35-year-old woman presented to outpatients with a 1-week history of high-grade fever and generalised malaise. General and systemic examination was unremarkable. On evaluation, her complete haemogram was within normal limits; however peripheral smear revealed the presence of thread-like larval forms of filaria, belonging to the species Wuchereria bancrofti. A wet mount preparation of the centrifuged whole blood sample was done, which demonstrated 'dancing' microfilaria, recorded in real time (see online ).
Dancing adult worms can be visualised within the dilated lymphatic channels on high-resolution ultrasound by their characteristic wriggling type movements, known as the 'filarial dance sign'.1 A wet mount of blood from a patient with microfilaraemia can demonstrate 'dance sign' of the baby worms under a microscope, identical to the parental wriggling movements. Microfilariae are larval forms, released into the blood from adult female worms inhabiting the regional lymphatic vessels. Circulating microfilariae are...
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