Human Parasitic Infestation in Children – Detection and Treatment

The human roundworm, scientifically classified as *Ascaris lumbricoides*, represents one of the most prevalent intestinal parasites affecting the human small intestine worldwide. Mature female worms exhibit remarkable fecundity, capable of laying up to two hundred thousand eggs per day, which are subsequently expelled from the host’s body via fecal matter. These eggs harbor invasive larvae that, under favorable environmental conditions, can reinfect humans upon ingestion. The developmental cycle commences within the lumen of the small intestine, where larvae penetrate the intestinal wall to enter the circulatory system—both blood vessels and lymphatic channels. From there, they embark on a migratory pathway through the bloodstream, sequentially traversing the liver, lungs, and—via the trachea—reaching the pharynx. Through the act of swallowing, the larvae re-enter the digestive tract, passing first into the stomach before returning to the small intestine. Over a period of approximately two to three months, the larvae mature into adult worms, attaining substantial lengths ranging from fifteen to forty centimeters. The complete life cycle of *Ascaris lumbricoides* spans twelve to thirteen months, with transmission occurring primarily through the fecal-oral route—specifically via the ingestion of contaminated eggs. Food sources, particularly unwashed fruits and vegetables, as well as contaminated drinking water, serve as common vectors. Children are at heightened risk of infection due to inadequate hygiene practices, such as failing to wash hands after playing in sandboxes or engaging in gardening activities. The risk is further amplified in rural areas, where sanitation infrastructure may be less robust and hygienic standards less consistently maintained.

The clinical presentation of *Ascaris lumbricoides* infection in pediatric populations varies according to individual immune responsiveness, duration of parasitic colonization, and the severity of worm burden. Initial symptoms typically include abdominal discomfort, recurrent nausea, emesis, and low-grade to high fever. A pathognomonic feature is the presence of viable larvae in fecal matter. Chronic infestation in children frequently manifests as neurological disturbances—heightened irritability, insomnia, nocturnal bruxism, and, in extreme cases, seizure-like episodes resembling epilepsy. Concurrent allergic dermatological reactions (pruritus, urticarial eruptions, peripheral edema), conjunctivitis, nonproductive cough, and lacrimation are commonly observed. Prolonged parasitism correlates with cognitive and physical growth retardation (underweight status, stunted linear growth). Systemic complications arise from the cumulative toxicity of parasitic metabolic byproducts, including microcytic anemia, biliary or pancreatic duct obstruction, and secondary inflammatory conditions affecting these organs. Global epidemiological data indicate that severe ascariasis accounts for approximately 60,000 annual fatalities worldwide.

The management of ascariasis in pediatric populations primarily relies on targeted pharmacotherapy that can be safely administered in home settings. When larval forms are detected, specific anthelmintic agents such as pyrantel are employed. In cases where mature parasites are responsible for the infestation, healthcare providers recommend a single-dose regimen of mebendazole or albendazol [2], followed by fecal examination after a two-week interval to assess treatment efficacy. Should the initial therapeutic approach prove insufficient, the medication protocol must be repeated. Complementary hygiene measures—including daily changes of personal clothing and bed linens, thorough disinfection of living surfaces, and sanitation of bathroom facilities—play a critical role in preventing reinfection. Transmission of *Ascaris lumbricoides* among children most commonly occurs through ingestion of inadequately washed raw produce, consumption of unboiled water, or lapses in personal hygiene practices. Clinical manifestations such as hyperactivity, abdominal pain, sleep disturbances, or dermatological symptoms necessitate prompt medical evaluation to establish an accurate diagnosis and initiate appropriate antiparasitic treatment.