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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 at the beginning of the disease. [ 1 ]
Ascaris lumbricoides is a large parasitic roundworm of the genus Ascaris. It is the most common parasitic worm in humans. [ 1 ] An estimated 807 million–1.2 billion people are infected with Ascariasis. lumbricoides worldwide. [ 2 ]
Ascaris lumbricoides Linn., 1758 Ascaris suum ( Goeze , 1782) Ascaris is a nematode genus of parasitic worms known as the "small intestinal roundworms". [ 1 ]
Children, compounded with malnutrition, are most infected, with the most common age group being 3- to 8-year-olds, with an annual death of about 20,000. Children are more susceptible due to their frequent exposure to contaminated environments such as during playing, eating raw vegetables and fruits, and drinking wastewater.
Ascaris lumbricoides. Hookworm Trichuris trichiura. Toxocara spp. Timeline of lifecycle stages Larval formation Some days (eggs can survive for months) [26] 9–15 days [23] 18 days to several weeks [27] 1–2 days [28] 15–30 days [29] Larval growth After hatching, the larvae develop into cysticercoid, which can survive for years in an animal ...
Only a few roundworm eggs are necessary to cause larva migrans in human children or adults. However, visceral larva migrans seems to affect children aged 1–4 more often while ocular larva migrans more frequently affects children aged 7–8. Between 4.6% and 23% of U.S. children have been infected with the dog roundworm egg.
The exact incubation period of T. trichiura is unknown, however, immature eggs in soil under favorable conditions take about three weeks to mature: 15–30 days, 10 days minimum to mature before ideal ingestion by the human host. Favorable conditions for maturation of eggs are warm to temperate climates with adequate humidity or precipitation ...
The relationship between the latent period, the infectious period (the period of communicability) and the incubation period. In some diseases, as depicted in this diagram, the latent period is shorter than the incubation period. A person can transmit an infection without showing any signs of the disease.