Rack ur brain - Image Challenge 5

September 12, 20085comments

Image A

Image B

Image C

Image D

Image E


Images from a Giemsa stained thick and thin blood smear were received by you through e-mail. The only case history available was that the patient lived in Africa until the beginning of this year. Attached images A and B are taken from thick smear & Images C, D and E are taken from thin smear. In image C, the object measured 300 micrometers; close-ups of the posterior and anterior ends are shown in D and E, respectively. What is your diagnosis? Based on what criteria?

Courtesy: DpDx, CDC

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+ comments + 5 comments

Anonymous
September 12, 2008 at 2:46 PM

Microfilarial larvae

Anonymous
September 13, 2008 at 10:01 AM

The Microfilaria in these smears were identified as Loa loa, because of its sheath, frequent coiling and relatively dense nucleus.

Anonymous
September 17, 2008 at 5:31 PM

Microfilaria of Wuchereria bancrofti Sheathed. The cells do not extend to the tip of the tail.

September 17, 2008 at 9:21 PM

I would diagnose it as Wuchereria bancrofti microfilaria due to the following reasons:
1) It is sheathed.
2) No nuclei at the posterior end or the tail. (Brugia malayi has the tail nuclei).

September 24, 2008 at 6:21 PM

Hats off to Maheswari and Anupama for the correct diagnosis of this case.

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