Ascariasis medical therapy
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Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]Associate Editor(s)-in-Chief: Fatimo Biobaku M.B.B.S [2]
Overview
Antimicrobial therapy with albendazole is usually the treatment of choice for ascariasis, although other antihelminthic medications can effectively eradicate the parasite.[1]
Medical Therapy
All ascariasis infection (symptomatic and asymptomatic) should be treated with antimicrobial therapy.[2] Due to the high rate of reinfection, it is sometimes necessary to repeat antimicrobial therapy.[3]
Antihelminthic Regimen for Ascariasis[2][4][5][6][3]
- Preferred regimen
- Albendazole 400 mg PO single dose. Albendazole dose for children between the ages of 1-2 years is 200 mg.
- Mebendazole 500 mg PO single dose or 100 mg bid for 3 days
- Alternative regimen
- Ivermectin 150 to 200 µg/kg PO single dose
- Nitazoxanide 500 mg bid for 3 days (adolescents and adults); 200mg bid for 3 days (children 4-11 yrs of age); 100mg PO bid for 3 days (children 1-3 yrs of age)
- Levamisole 150 mg PO single dose. The pediatric dose is 2.5 mg/kg PO daily
- Pyrantel pamoate 11 mg/kg single dose PO, maximum 1.0 g
- Piperazine citrate 75 mg/kg/day for 2 days, maximum 3.5 g/day
Management of Intestinal obstruction
Intestinal obstruction due to ascariasis should be managed conservatively by:[2][3]
- Nasogastric decompression
- Fluid and electrolyte repletion
- Antihelminthic therapy once bowel motility is restored. Piperazine causes flaccid paralysis of the worms and this can help relieve the obstruction through rapid expulsion of the worms. It is preferably administered as a syrup via a nasogastric tube when treating intestinal or biliary obstruction due to ascariasis.
- Complete obstruction with inadequate decompression, lack of response within an interval of 24-48 hrs, volvulus, intussusception or perforation should be managed surgically.
Management of Biliary ascariasis[2]
- Conservative management
- NG suction
- Antispasmodics
- Analgesics
- Intravenous fluids
- Antibiotics if evidence of bacterial infection
- Antihelminthic therapy
- Endoscopic or surgical removal
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.
- ↑ 2.0 2.1 2.2 2.3 Durand, Marlene (2015). "Chapter 288:Intestinal Nematodes (Roundworms)". Mandell, Douglas, and Bennett's Principles and Practice of Infectious Diseases Updated Edition, Eighth Edition. Elsevier. pp. 3199–3207. ISBN 978-1-4557-4801-3.
- ↑ 3.0 3.1 3.2 Kliegman, Robert; Stanton, Bonita; St. Geme, Joseph; Schor, Nina (2016). "Chapter 291:Ascariasis (Ascaris lumbricoides)". Nelson Textbook of Pediatrics Twentieth Edition. Elsevier. pp. 1733–1734. ISBN 978-1-4557-7566-8.
- ↑ Centers for Disease Control and Prevention.https://www.cdc.gov/parasites/ascariasis/health_professionals/index.html#tx Accessed on the 6th of March, 2017.
- ↑ Romero Cabello R, Guerrero LR, Muñóz García MR, Geyne Cruz A (1997). "Nitazoxanide for the treatment of intestinal protozoan and helminthic infections in Mexico". Trans R Soc Trop Med Hyg. 91 (6): 701–3. PMID 9580117.
- ↑ Khuroo MS (1996). "Ascariasis". Gastroenterol Clin North Am. 25 (3): 553–77. PMID 8863040.