ascariasis

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ascariasis

 [as″kah-ri´ah-sis]
infection by the nematode Ascaris lumbricoides, seen in temperate and tropical regions of the world; it is common in the southern mountain region of the United States and is associated with poor sanitation such as when human feces is used as fertilizer. The Ascaris eggs develop into larvae in the soil and on growing plants on which feces have been deposited. When such vegetables are eaten without having been properly washed or cooked, live larvae are carried into the digestive system along with the food. Migrating from the intestines into the blood, then to the lungs and the esophagus, the larvae finally return to the intestines, where they grow to maturity, reaching a length ranging from 15 to 35 cm (6 to 14 in).

Ascaris infection may go unsuspected until a worm is passed in the stool. But there may be colic or other abdominal symptoms, and occasionally the worms are vomited during their passage through the esophagus. In children, “wandering worms” may emerge through the skin near the navel, and in adults, near the groin. Infected children usually are thin because the worms consume vital nutrients and inhibit the digestion of proteins. Loss of appetite and angioneurotic edema are common, and the face may be swollen.

Accurate diagnosis of the presence and extent of Ascaris infection usually depends on the detection of eggs in a stool sample examined microscopically. Treatment involves the use of medications such as mebendazole or pyrantel. to destroy and expel the parasites, and is completely successful in nearly every case. Prevention of Ascaris infection depends primarily on the sanitary disposal of human feces and discontinuing their use as fertilizer. Also important are the thorough washing of hands before food is prepared, and the careful cleaning and cooking of possibly infected foods.
Miller-Keane Encyclopedia and Dictionary of Medicine, Nursing, and Allied Health, Seventh Edition. © 2003 by Saunders, an imprint of Elsevier, Inc. All rights reserved.

as·ca·ri·a·sis

(as'kă-rī'ă-sis), Do not confuse this word with acariasis.
Disease caused by infection with Ascaris or related ascarid nematodes.
[G. askaris, an intestinal worm, + -iasis, condition]
Farlex Partner Medical Dictionary © Farlex 2012

ascariasis

(ăs′kə-rī′ə-sĭs)
n.
Infestation with or disease caused by the parasitic roundworm Ascaris lumbricoides.
The American Heritage® Medical Dictionary Copyright © 2007, 2004 by Houghton Mifflin Company. Published by Houghton Mifflin Company. All rights reserved.

ascariasis

Infestation by the nematode Ascaris lumbricoides.
Epidemiology Infection occurs after ingesting eggs in contaminated food or, more commonly, is carried to mouth by the hands after contact with contaminated soil. After an early pulmonary phase (larval migration), worms stay in the intestine.
Clinical findings Often asymptomatic.
Clinical findings, larval migration to lungs Wheezing, cough, chest pain, dyspnoea, pneumonitis at time of transpulmonary migration.
Clinical findings, larval migration elsewhere Conjunctivitis, fever, seizures, rash.
Clinical findings with mature worms Abdominal colic, nausea, vomiting, anorexia, anal pruritus, weight loss, diarrhoea, malabsorption.
Management Mebendazole, piperazine.
Segen's Medical Dictionary. © 2012 Farlex, Inc. All rights reserved.

ascariasis

Infectious disease Infection by a nematode, Ascaris lumbricoides Epidemiology Infection occurs after ingesting eggs in contaminated food or more commonly, carried to mouth by hands after contact with contaminated soil; after an early pulmonary phase–larval migration, worms stay in the intestine Clinical Asymptomatic; pneumonitis at time of transpulmonary migration; diarrhea, abdominal colic Management Mebendazole, pyrantel pamoate
McGraw-Hill Concise Dictionary of Modern Medicine. © 2002 by The McGraw-Hill Companies, Inc.

as·ca·ri·a·sis

, ascaridiasis , ascaridosis , ascariosis (askă-rīă-sis, -ri-dīă-sis, -ri-dōsis, -rē-ōsis)
A disease caused by infection with Ascaris or related ascarid nematodes.
[G. askaris, an intestinal worm, + -iasis, condition]
Medical Dictionary for the Health Professions and Nursing © Farlex 2012

ascariasis

Infestation with the roundworm Ascaris lumbricoides which lives, often in considerable numbers, in the small intestine.
Collins Dictionary of Medicine © Robert M. Youngson 2004, 2005