Can loiasis cause blindness?
Worm migration through the subconjunctiva may progress to invasion of the eye itself by adult worms, causing pain, intraocular inflammation, and even blindness.
What is the meaning of loiasis?
Loiasis, called African eye worm by most people, is caused by the parasitic worm Loa loa. It is passed on to humans through the repeated bites of deerflies (also known as mango flies or mangrove flies) of the genus Chrysops. The flies that pass on the parasite breed in certain rain forests of West and Central Africa.
How do you know if you have loiasis?
If you have loiasis, you may have itchy, non-painful swellings of the body that come and go. The swellings can show up anywhere though they are more common near joints. You may develop an eye worm that crawls across the surface of your eye. Sometimes you may see a worm that crawls under your skin.
Is there a cure for loiasis?
Surgical excision of migrating adult worms is an effective treatment for symptoms localized to the migrating worm and provides an opportunity for diagnosis. Surgery is not curative. Antiparasitic medication is required for cure. The drug of choice for the treatment of loiasis is diethylcarbamazine (DEC).
How common is loiasis?
An estimated 14.4 million people live in these areas of high rates of infection. Another 15.2 live in areas where 20–40% of people report that they have had eye worm in the past. The people most at risk for loiasis are those who live in the certain rain forests in West and Central Africa.
Where do Loa loa worms live?
Loa loa parasites are found in West and Central Africa. Ten countries have areas where there are high rates of infection (i.e., where more than 40% of the people who live in that area report that they have had eye worm in the past).
What causes worms in your eyes?
Eye worms infect a variety of animals, but human infections are rare. The worms are transmitted to eyes by flies. The flies ingest the worm larvae, then land on an animal’s eyes, where the flies feed on tears and other secretions.
Where can you get loiasis?
Loiasis is confined to the rain forest belt of western and central Africa. Humans are the only known natural reservoir for this parasite. Loa loa microfilariae are transmitted by day-biting tabanid flies (Chrysops [deer fly or horse fly]).
Can worms grow under your skin?
Larvae can become adults only inside the human body. The adult worms live between layers of connective tissue (e.g., ligaments, tendons) under the skin and between the thin layers of tissue that cover muscles (fascia). Fertilized females can make thousands of microfilariae a day.