We have moved onto microfilariae found in SKIN specimens - what fun! There are only a couple to choose from. Can you tell which one this is? The microfilariae are approximately 200 micrometers long.
Carazzi stain
Giemsa stain:
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This is a small microfilaria, the width is less than that of the surrounding neutrophils. The Carrazi stain did not show a sheath either. The two details point to the Mansonella species. The nuclei extend to the end of the tail, a detail not found in Mansonella ozzardi . The specimen is skin snips rule out Mansonella perstans . The typically curved tail further asserts the identity of Mansonella streptocerca (from Ancient Greek streptocerca= curved, and kerkos= tail).
Florida Fan
Oops, forgive my omission of the question. The size of the microfilaria is only 200 micrometers, well short of the typical 300 micrometers length of the microfilaria of Onchocerca volvulus which can also be found in the skin and also elsewhere.
Florida Fan
Since the sample is from skin snips, this narrows it down to either Mansonella streptocerca or Onchocerca volvulus. The microfilaria is 200 microm in length, and in the picture, there is no sheath, it has a hooked tail, and the nuclei are present to the tip of the tail. All of this makes Mansonella streptocerca my number one answer.
Onchocerciasis
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