Coloured LM of a Loa loa worm in a blood smear

Coloured LM of a Loa loa worm in a blood smear

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Credit: BSIP DUCLOUX/BRISOU/SCIENCE PHOTO LIBRARY

Caption: Loa loa worm. Coloured light micrograph (LM) of a Loa loa worm on a human blood smear. The worm can be seen amongst the red blood cells (coloured grey). The Loa loa worm is a parasitic nematode that lives under human skin, causing a form of filariasis called loiasis. The worms are spread by bloodsucking Chrysops flies in tropical Africa, and reach 3-7cm when mature. They can sometimes be seen migrating across the surface of the eyes, where they cause irritation but do no serious harm. The symptoms of loiasis are swollen, painful and itchy areas of skin called calabar swellings. As in this case, diagnosis may be made by taking a blood sample. Magnification unknown.

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Keywords: blood smear, calabar swelling, condition, disease, disorder, eyeworm, filariasis, healthcare, human, light micrograph, loa loa, loiasis, medical, medicine, nematode, parasite

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