Related Experiment Video
Updated: Apr 16, 2026
Studying Cryptosporidium Infection in 3D Tissue-derived Human Organoid Culture Systems by Microinjection
Published on: September 14, 2019
Isolation of Small Number of Cryptosporidium parvum Oocyst Using Immunochromatography
Elahe Ebrahimzade1, Parviz Shayan1, Zeinab Asghari1
1Department of Parasitology, Iranian Center for Ticks and Tick-borne Diseases, Faculty of Veterinary Medicine, University of Tehran, Tehran, Iran.
Background:
Cryptosporidium parvum causes severe gastroenteritis in immunocompromised human and new borne animals. The organism can be transmitted through water. Since small number of C. parvum is infectious, the aim of the present study was to develop a chromatography method for the isolation of C. parvum oocyst in samples with limited number of oocysts.
Methods:
Antibody was prepared against whole antigen from C. parvum oocysts, the achieved Ab bound to the sepharose 4B and used for the isolation of oocysts. Antibody against P23 bound to the sepharose 4B, used also for the isolation of C. parvum oocyst. In comparison to these both methods, 2 traditional methods (Salt floatation and 55% sucrose floatation) were also performed.
Results:
Both chromatography methods could bind oocysts with capacity depends on the column size. The isolated oocysts were free of bacteria. Our results showed that the traditional methods are useful for the isolation of oocysts from feces, in its smear stained with ziehl-nelsen, at least 3 oocyts are detectable in each microscopic field under 1000 X magnification. In contrast to the chromatography methods, the bacterial contamination was always observed in oocysts isolated with traditional methods.
Conclusion:
Immunochromatography could be used for the successful isolation of C. parvum oocysts from the samples containing limited number of oocysts.
Insights
This study developed immunochromatography to isolate Cryptosporidium parvum oocysts. This method successfully isolates oocysts from samples with low parasite numbers, avoiding bacterial contamination.
Area of Science:
- Parasitology
- Immunology
- Analytical Chemistry
Background:
- Cryptosporidium parvum causes severe gastroenteritis in immunocompromised individuals and animals.
- Waterborne transmission of C. parvum poses a public health risk.
- Developing methods to detect low oocyst numbers is crucial for diagnosis and control.
Purpose of the Study:
- To develop an immunochromatography method for isolating C. parvum oocysts.
- To evaluate the efficacy of antibody-based chromatography for oocyst isolation.
- To compare immunochromatography with traditional isolation methods.
Main Methods:
- Antibodies against whole C. parvum oocysts and P23 antigen were prepared and immobilized on Sepharose 4B for chromatography.
- Traditional methods including salt flotation and 55% sucrose flotation were used for comparison.
- Oocyst isolation efficiency and purity were assessed.
Main Results:
- Both immunochromatography methods effectively bound C. parvum oocysts, with capacity dependent on column size.
- Oocysts isolated via immunochromatography were free from bacterial contamination.
- Traditional methods, while useful for fecal samples, consistently resulted in bacterial contamination.
Conclusions:
- Immunochromatography is a successful method for isolating C. parvum oocysts.
- This technique is particularly effective for samples with limited oocyst concentrations.
- Immunochromatography offers an advantage over traditional methods by providing bacteria-free isolates.
More Related Videos
11:17Obtaining Highly Purified Toxoplasma gondii Oocysts by a Discontinuous Cesium Chloride Gradient
Published on: November 3, 2009
12:11A Modified EPA Method 1623 that Uses Tangential Flow Hollow-fiber Ultrafiltration and Heat Dissociation Steps to Detect Waterborne Cryptosporidium and Giardia spp.
Published on: July 9, 2012