Echinococcosis: Difference between revisions
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==Differential Diagnosis== | ==Differential Diagnosis== | ||
*[[Cysticercosis]] | *[[Cysticercosis|Neurocysticercosis]] | ||
{{Liver abscess DDX}} | {{Liver abscess DDX}} | ||
== | ==Diagnosis== | ||
===Work-up=== | |||
*Abdominal Ultrasound (most widely used) | *Abdominal Ultrasound (most widely used) | ||
*CT | *CT | ||
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*ELISA-sensitivity inversely related to antigen sequestration in cysts | *ELISA-sensitivity inversely related to antigen sequestration in cysts | ||
*Percutaneous aspiration | *Percutaneous aspiration | ||
==Management== | ==Management== | ||
*Tissue stage/hydatid disease: [[albendazole]] 400 mg BID x 28 days, repeat as needed every 2 weeks x 3 cycles | *Tissue stage/hydatid disease: [[albendazole]] 400 mg BID x 28 days, repeat as needed every 2 weeks x 3 cycles | ||
| Line 31: | Line 33: | ||
==Disposition== | ==Disposition== | ||
* | *Discharge (if no significant clinical complications) | ||
==See Also== | ==See Also== | ||
*[[Tapeworm]] | *[[Tapeworm]] | ||
*[[ | *[[Helminth infections]] | ||
*[[Travel | *[[Travel medicine]] | ||
*[[Parasitic | *[[Parasitic diseases]] | ||
== | ==References== | ||
<references/> | |||
[[Category:ID]] | [[Category:ID]] | ||
[[Category:TropMed]] | [[Category:TropMed]] | ||
Revision as of 11:27, 18 August 2015
Background
- 2 most important forms are cystic and alveolar caused by E. granulosus and E. multilocularis
- Humans are accidental immediate hosts by ingesting parasitic eggs from contaminated food, soil, water, or direct contact with definitive hosts
- Usual intermediate hosts-sheep, goat, swine, cattle, rodents and camel
- Definitive hosts-dogs, cats, fox, and wolves
- Ingested eggs then hatch, penetrate intestinal mucosa, and spread hematogenously to final destination to form cysts
Clinical Features
- Asymptomatic for many years
- Abdominal cysts- pain, distension, nausea and vomiting
- Alveolar abscess-chest pain, shortness of breath, chronic cough
- Musculoskeletal pain, blindness, headache, and stroke like symptoms if involving muscles, bones, eyes or brain
Differential Diagnosis
Hepatic abscess
- Pyogenic abscess
- Aerobic: Escherichia coli, Klebsiella, Pseudomonas
- Anaerobic: Enterococcus, bacteroides, anaerobic streptococci
- Echinococcosis
- Amebiasis
- Benign cysts/malignancy
- Tuberculosis
- Mycosis
Diagnosis
Work-up
- Abdominal Ultrasound (most widely used)
- CT
- MRI
- ELISA-sensitivity inversely related to antigen sequestration in cysts
- Percutaneous aspiration
Management
- Tissue stage/hydatid disease: albendazole 400 mg BID x 28 days, repeat as needed every 2 weeks x 3 cycles
- Surgical removal
- Do not aspirate cysts (risk of seeding disease or anaphylactoid reaction from spillage of hydatid sand which contains antigenic proteins)
- PAIR (Percutaneous aspiration, injection, reaspiration)
- Inject with 95% ethanol or hypertonic saline, leave in for 15 minutes, then reaspirate
Disposition
- Discharge (if no significant clinical complications)