Ascariasis causes
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Ascariasis causes On the Web |
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Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]; Associate Editor-In-Chief: Imtiaz Ahmed Wani, M.B.B.S; Fatimo Biobaku, M.B.B.S
For the microbiologic aspects of the causative organism, see Ascaris lumbricoides
Overview
Ascariasis is a soil helminth infection caused by the nematode Ascaris lumbricoides.[1]
Causes
| Genus and Species | Ascaris lumbricoides |
|---|---|
| Common Name | Giant Intestinal Roundworm |
| Etiologic Agent of: | Ascariasis |
| Infective stage | Embryonated Egg |
| Definitive Host | Man |
| Portal of Entry | Mouth |
| Mode of Transmission | Ingestion of Embryonated egg through contaminated food or water |
| Habitat | Small Intestine |
| Pathogenic Stage | Adult Larva |
| Mode of Attachment | Retention in the mucosal folds using pressure |
| Mode of Nutrition | Feeding of Chyme |
| Pathogenesis | Larva – pneumonitis, Loffler’s syndrome;
Goes through a Blood-Lung Phase (Hookworm and Strongyloides stercoralis also have a blood-lung phase); Adult worm– Obstruction, Liver abscess, Appendicitis. |
| Laboratory diagnosis | Direct Fecal Smear; Concentration methods such as Kato-Katz |
| Treatment | Albendazole, Mebendazole, or Pyrantel Pamoate |
| Diagnostic Feature - Adult | Female - prominent genital girdle |
| Diagnostic Feature - Egg | Coarse mammilated albuminous coating |
References
- ↑ Kim, Kami; Weiss, Louis; Tanowitz, Herbert (2016). "Chapter 39:Parasitic Infections". Murray and Nadel's Textbook of Respiratory Medicine Sixth Edition. Elsevier. pp. 682–698. ISBN 978-1-4557-3383-5.