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Filariasis
[Brugia malayi] [Brugia timori] [Dirofilaria spp.] [Loa loa] [Mansonella ozzardi] [Mansonella perstans]
[Mansonella streptocerca] [Onchocerca volvulus] [Wuchereria bancrofti]

Microfilariae of Loa loa are sheathed an measure 230-250 µm long in stained blood smears and 270-300 µm in 2% formalin.  The tail is tapered and nuclei extend to the tip of the tail.  Microfilariae circulate in the blood.

Loa loa Loa loa

A

B

A: Microfilaria of L. loa in a thin blood smear, stained with Giemsa.
B: Microfilaria of L. loa a thick blood smear from a patient from Cameroon, stained with Giemsa.  Note the nuclei extending to the tip of the tail to the left of the image.

Loa loa Loa loa

C

D

C: Microfilaria of L. loa in a thin blood smear, stained with Giemsa.
D: Microfilaria of L. loa in a thick blood smear, stained with Giemsa.

Loa loa Loa loa

E

F

E: Microfilaria of L. loa in a thick blood smear, stained with Giemsa.
F: Microfilaria of L. loa in a thin blood smear, stained with Giemsa.

 

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