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There are generally few or no symptoms. A bolus of worms may obstruct the intestine; migrating larvae may cause pneumonitis and eosinophilia. Adult worms have a lifespan of 1–2 years which means that individuals may be infected all their lives as worms die and new worms are acquired. [13]
The adult worms can cause inflammation, damage to the organs and various symptoms. The symptoms of schistosomiasis may vary depending on the extent of the infection, the species of the parasite and the host's immune response. The acute phase of the infection may present with fever, rash, abdominal pain and diarrhea.
Intestinal parasites produce a variety of symptoms in those affected, most of which manifest themselves in gastrointestinal complications and general weakness. [1] Gastrointestinal conditions include inflammation of the small and/or large intestine , diarrhea / dysentery , abdominal pains , and nausea / vomiting .
Once in the trachea, the worms are coughed up into the pharynx and then swallowed again, after which they pass through the stomach and into the small intestine, where they mature into adult worms. [5] [7] The adult worms begin producing fertilized eggs within 60–65 days of being swallowed; [7] females produce as many as 200,000 eggs per day ...
A. lumbricoides is the largest intestinal roundworm and is the most common helminth infection of humans worldwide. Infestation can cause morbidity by compromising nutritional status, [3] affecting cognitive processes, [4] inducing tissue reactions such as granuloma to larval stages, and by causing intestinal obstruction, which can be fatal.
Several species of Trichinella can cause disease, with T. spiralis being the most common. [1] After the infected meat has been eaten, the larvae are released from their cysts in the stomach. [1] They then invade the wall of the small intestine, where they develop into adult worms. [1]
Once in the host gut, Necator tends to cause a prolonged infection, generally 1 to 5 years (many worms die within a year or two of infection), though some adult worms have been recorded to live for 15 years or more. Ancylostoma adults are short-lived, surviving on average for only about 6 months. However, the infection can be prolonged because ...
These intestinal worms can cause a number of symptoms in people, principally skin symptoms, abdominal pain, diarrhea and weight loss, but also many other specific and vague symptoms in disseminated disease, and severe life-threatening conditions through hyperinfection.