Detection of Intestinal Parasites
Less Common Fecal Parasites
March 2009
So to summarize, Giardia intestinalis and Cryptosporidium species are the most commonly encountered fecal parasites in the United States, and the test of choice for these organisms is an antigen test performed by an enzyme immunoassay. For this reason, we advise against ordering a routine stool ova and parasite examination unless the patient has a history that may suggest a different parasite.
It is important to mention that other fecal parasites may occasionally be encountered in the U.S. These include:
- Cyclospora cayetensis
- Microsporidia spp
- Entamoeba histolytica
- Intestinal helminths. All except Microsporidia are rarely encountered in the United States, and are seen primarily in travelers to and immigrants from endemic areas
Less Common Fecal Parasites |
Jump to section:
- Introduction
- Intestinal Parasites
- Detection of Intestinal Parasites
- Direct Smear of Fresh Feces
- Direct Smear of Fresh Feces
- Motile Trophozoite of Pentatrichomonas hominis
- Motile Larva of Strongyloides stercoralis
- Feces Concentration
- Concentrated Feces with Saline
- Concentrated Feces Wet Preparation
- Concentrated Fecal Smear Stained with a Modified Trichrome Stain
- Giardia intestinalis
- Additional Tests on Fecal Samples
- Which One to Order?
- Parasitic Investiagation of Stool Specimens Algorithm
- Giardia intestinalis
- Life Cycle of Giardia
- Concentrated Feces Wet Preparation
- Giardia intestinalis - Cyst
- Giardia intestinalis - Trophozoite
- Clinical Presentation
- Epidemiology
- US Risk Factors for Giardiasis
- G intestinalis is Easily Transmitted Because
- Diagnosis of Giardiasis
- Algorithm Close-up
- Giardia Antigen Test, Feces
- Sandwich Assay
- ELISA Microtiter Plate
- Treatment
- Cryptosporidium spp
- Cryptosporidium Life Cycle
- Cryptosporidium - Cyst on Wet Prep
- Cryptosporidium - Cysts with Acid Fast Stain
- Clinical Presentation
- Epidemiology
- Examples of Outbreaks
- Examples of Outbreaks
- Cryptosporidium is Easily Acquired Because
- Diagnosis
- Algorithm Close-up
- Cryptosporidium Antigen Test, Feces
- Treatment
- Less Common Fecal Parasites
- Algorithm Close-up
- References
- Questions?
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