Membrane Filter Concentration for Filariae

With a syringe and firm pressure, pass 5 to 7 ml of blood through a 5-/rm Nuclepore filter held in a Swinney adapter. 

Wash the membrane several times with a small amount of distilled water or physiologic saline. 

The moist filter may be examined directly or fixed and stained in the usual fashion for a thin blood film. 

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