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Ascariasis is a disease caused by the parasitic roundworm Ascaris lumbricoides. [1] Infections have no symptoms in more than 85% of cases, especially if the number of worms is small. [1] Symptoms increase with the number of worms present and may include shortness of breath and fever in the beginning of the disease. [1]
An estimated 807 million–1.2 billion people are infected with A. lumbricoides worldwide. [2] People living in tropical and subtropical countries are at greater risk of infection. Infection by Ascaris lumbricoides is known as ascariasis. [3] It has been proposed that Ascaris lumbricoides and Ascaris suum (pig roundworm) are the same species. [4]
Female Ascaris lumbricoides. Ascariasis of STH is caused by the large roundworm A. lumbricoides. It is estimated to be the most widespread STH, affecting approximately 1 billion people. The victims constitute about half of the populations in tropical and subtropical areas. Most conditions are mild and often show little or no symptoms. Heavy ...
Ascaris infection: Antimesenteric splitting of the outer layers of the bowel wall due to a large amount of ascaris (South Africa) The signs and symptoms of helminthiasis depend on a number of factors including: the site of the infestation within the body; the type of worm involved; the number of worms and their volume; the type of damage the ...
A. lumbricoides was originally called Lumbricus teres and was first described in detail by Edward Tyson in 1683. [8] The genus Ascaris was originally described as the genus for Ascaris lumbricoides by Carl Linnaeus in 1758. [9] The morphologically similar Ascaris suum was described from pigs by Johann August Ephraim Goeze in 1782. [9]
Hookworms attached to the intestinal mucosa Two pinworms Image showing life cycle inside and outside of the human body of one fairly typical and well described helminth: Ascaris lumbricoides. Helminths are a group of organisms which share a similar form but are not necessarily evolutionarily related. The term "helminth" is an artificial term.
Swelling, redness, pus or yellow drainage, increased pain, and warmth around the blister are signs it could be infected, Dr. Patel says. You may also get a fever. You should see a doctor if you ...
Nematodes causing such zoonotic infections are Baylisascaris procyonis, [2] Toxocara canis, [3] Toxocara cati, [3] and Ascaris suum. [4] These nematodes can infect but not mature in humans and after migrating through the intestinal wall, travel with the blood stream to various organs where they cause inflammation and damage.