Detection of Intestinal Parasites
Concentrated Fecal Smear Stained with a Modified Trichrome Stain

March 2009
This next image shows several glass slides containing permanently stained concentrated feces. You’ll notice that there is a drop of oil on each slide because these smears will be examined under high magnification, using 50 and 100x objectives. The permanent stain gives us more detail than the wet mount alone and allows for better detection of the parasites Dientamoeba fragilis and Blastocystis hominis. It is not clear whether or not these organisms cause disease in humans, but there is some evidence that links them with non-specific GI symptoms.
Concentrated Fecal Smear |
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?