Strongyloidiasis medical therapy: Difference between revisions

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{{Strongyloidiasis}}
{{Strongyloidiasis}}
{{CMG}} ; {{AE}} {{ADG}}
{{CMG}}; {{AE}} {{ADG}}


==Overview==
==Overview==
The drug of choice for the treatment of uncomplicated strongyloidiasis is ivermectin with albendazole as the alternative. All patients who are at risk of disseminated strongyloidiasis should be treated.<ref>http://www.dpd.cdc.gov/dpdx/HTML/Strongyloidiasis.htm</ref>
[[Ivermectin]], [[thiabendazole]], and [[albendazole]] are the most effective medicines for treating strongyloidiasis infection. [[Ivermectin]] is the drug of choice, and [[albendazole]] is considered the least effective. [[Thiabendazole]] is not generally used in the U.S. due to adverse events, but it is still used in other countries. All patients with strongyloidiasis (even asymptomatic patients) require treatment. Complete obstruction with inadequate decompression, lack of response within an interval of 24-48 hrs, [[volvulus]], [[intussusception]], or [[Gastrointestinal perforation|perforation]] should be managed surgically.
 
==Treatment==
==Treatment==
All strongyloidiasis 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
All strongyloidiasis infection (symptomatic and [[asymptomatic]]) should be treated with [[Antimicrobial|antimicrobial therapy]]. Due to the high rate of reinfection, it is sometimes necessary to repeat antimicrobial therapy.<ref name="pmid26778150">{{cite journal |vauthors=Henriquez-Camacho C, Gotuzzo E, Echevarria J, White AC, Terashima A, Samalvides F, Pérez-Molina JA, Plana MN |title=Ivermectin versus albendazole or thiabendazole for Strongyloides stercoralis infection |journal=Cochrane Database Syst Rev |volume= |issue=1 |pages=CD007745 |year=2016 |pmid=26778150 |pmc=4916931 |doi=10.1002/14651858.CD007745.pub3 |url=}}</ref>
===Antimicrobial Regimen===
===Uncomplicated strongyloidiasis===
*Strongyloides stercoralis <ref name="pmid8483992">{{cite journal| author=Archibald LK, Beeching NJ, Gill GV, Bailey JW, Bell DR| title=Albendazole is effective treatment for chronic strongyloidiasis. | journal=Q J Med | year= 1993 | volume= 86 | issue= 3 | pages= 191-5 | pmid=8483992 | doi= | pmc= | url=http://www.ncbi.nlm.nih.gov/entrez/eutils/elink.fcgi?dbfrom=pubmed&tool=sumsearch.org/cite&retmode=ref&cmd=prlinks&id=8483992  }} </ref>
:* Preferred regimen (1): [[Ivermectin]] 200 μg/kg/day PO q24h for 2 days.<ref name="pmid8483992">{{cite journal| author=Archibald LK, Beeching NJ, Gill GV, Bailey JW, Bell DR| title=Albendazole is effective treatment for chronic strongyloidiasis. | journal=Q J Med | year= 1993 | volume= 86 | issue= 3 | pages= 191-5 | pmid=8483992 | doi= | pmc= | url=http://www.ncbi.nlm.nih.gov/entrez/eutils/elink.fcgi?dbfrom=pubmed&tool=sumsearch.org/cite&retmode=ref&cmd=prlinks&id=8483992  }} </ref><ref>{{Cite web | title = WGO Practice Guideline Management of Strongyloidiasis| url = http://www.worldgastroenterology.org/assets/downloads/en/pdf/guidelines/15_management_strongyloidiasis_en.pdf}}</ref>
:* Preferred regimen (1): [[Ivermectin]] 200 mcg/kg/day PO qd for 2 days or two doses 2 weeks apart from each other<ref>{{Cite web | title = WGO Practice Guideline Management of Strongyloidiasis| url = http://www.worldgastroenterology.org/assets/downloads/en/pdf/guidelines/15_management_strongyloidiasis_en.pdf}}</ref>
:** Note: For [[immunocompromised]] patients, several treatment courses at 2-week intervals is recommended.
:* Alternative regimen (1): [[Albendazole]] 400 mg PO bid for 3-7 days
:* Alternative regimen (1): [[Thiabendazole]] 1.5 g PO q24h for 2 consecutive days.
:* Alternative regimen (2): [[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)  
:** Note: The maximum dosage is 3 g/d every 2 days (this dosage is likely to be toxic and needs to be reduced)
:* Alternative regimen (3): [[Levamisole]] 150 mg PO single dose. The pediatric dose is 2.5 mg/kg PO daily
:** Note: Cure rates are as high as 87% to 94%, but the drug may not be effective in the disease that is disseminated beyond the [[gastrointestinal tract]].
:* Alternative regimen (4): [[Pyrantel pamoate]] 11 mg/kg single dose PO, maximum 1.0 g
:** Note: Many patients have [[gastrointestinal]] adverse effects, it is used rarely in the U.S. because of adverse effects
:* Alternative regimen (5): [[Piperazine citrate]] 75 mg/kg/day for 2 days, maximum 3.5 g/day
:* Alternative regimen (2): [[Albendazole]] 400 mg PO bid for 3 days
===Management of Intestinal obstruction===
===Complicated strongyloidiasis (Disseminated or hyper-infection syndrome)===
[[Intestinal obstruction]] due to strongyloidiasis should be managed conservatively by:
:* Preferred regimen (1): [[Ivermectin]] 200 μg/kg/d PO q24h orally for at least 7 to 10 days (until larvae are no longer detected in stool, [[sputum]], or urine)
* Nasogastric decompression
:** Note: For hyper-infection and disseminated disease, adding [[albendazole]] (400 mg PO bid for 7 days) to [[ivermectin]] may be warranted.
* 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.
* Complete obstruction with inadequate decompression, lack of response within an interval of 24-48 hrs, [[volvulus]], [[intussusception]] or perforation should be managed surgically.


==References==
==References==


{{Reflist|2}}
{{Reflist|2}}
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Latest revision as of 00:19, 30 July 2020

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Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]; Associate Editor(s)-in-Chief: Aditya Ganti M.B.B.S. [2]

Overview

Ivermectin, thiabendazole, and albendazole are the most effective medicines for treating strongyloidiasis infection. Ivermectin is the drug of choice, and albendazole is considered the least effective. Thiabendazole is not generally used in the U.S. due to adverse events, but it is still used in other countries. All patients with strongyloidiasis (even asymptomatic patients) require treatment. Complete obstruction with inadequate decompression, lack of response within an interval of 24-48 hrs, volvulus, intussusception, or perforation should be managed surgically.

Treatment

All strongyloidiasis infection (symptomatic and asymptomatic) should be treated with antimicrobial therapy. Due to the high rate of reinfection, it is sometimes necessary to repeat antimicrobial therapy.[1]

Uncomplicated strongyloidiasis

  • Preferred regimen (1): Ivermectin 200 μg/kg/day PO q24h for 2 days.[2][3]
    • Note: For immunocompromised patients, several treatment courses at 2-week intervals is recommended.
  • Alternative regimen (1): Thiabendazole 1.5 g PO q24h for 2 consecutive days.
    • Note: The maximum dosage is 3 g/d every 2 days (this dosage is likely to be toxic and needs to be reduced)
    • Note: Cure rates are as high as 87% to 94%, but the drug may not be effective in the disease that is disseminated beyond the gastrointestinal tract.
    • Note: Many patients have gastrointestinal adverse effects, it is used rarely in the U.S. because of adverse effects
  • Alternative regimen (2): Albendazole 400 mg PO bid for 3 days

Complicated strongyloidiasis (Disseminated or hyper-infection syndrome)

  • Preferred regimen (1): Ivermectin 200 μg/kg/d PO q24h orally for at least 7 to 10 days (until larvae are no longer detected in stool, sputum, or urine)
    • Note: For hyper-infection and disseminated disease, adding albendazole (400 mg PO bid for 7 days) to ivermectin may be warranted.

References

  1. Henriquez-Camacho C, Gotuzzo E, Echevarria J, White AC, Terashima A, Samalvides F, Pérez-Molina JA, Plana MN (2016). "Ivermectin versus albendazole or thiabendazole for Strongyloides stercoralis infection". Cochrane Database Syst Rev (1): CD007745. doi:10.1002/14651858.CD007745.pub3. PMC 4916931. PMID 26778150.
  2. Archibald LK, Beeching NJ, Gill GV, Bailey JW, Bell DR (1993). "Albendazole is effective treatment for chronic strongyloidiasis". Q J Med. 86 (3): 191–5. PMID 8483992.
  3. "WGO Practice Guideline Management of Strongyloidiasis" (PDF).

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