Cryptosporidium Parvum
Cryptosporidium Parvum - Related Videos
03:16
In Vitro Sporozoite Isolation from Cryptosporidium parvum Oocysts
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2025
In this video, we demonstrate an in vitro method to purify sporozoites from thick-walled oocysts of the pathogenic parasite Cryptosporidium parvum. The isolated sporozoites can be used for infection studies.
12:11
A Modified EPA Method 1623 that Uses Tangential Flow Hollow-fiber Ultrafiltration and Heat Dissociation Steps to Detect Waterborne Cryptosporidium and Giardia spp.
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Cited by 11 •
2012
This protocol describes the use of a tangential flow hollow-fiber ultrafiltration sample concentration system and a heat dissociation as alternative steps for the detection of waterborne Cryptosporidium and Giardia species using EPA Method 1623.
05:31
Studying Cryptosporidium Infection in 3D Tissue-derived Human Organoid Culture Systems by Microinjection
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Cited by 23 •
2019
We describe protocols to prepare oocysts and purify sporozoites for studying infection of human intestinal and airway organoids by Cryptosporidium parvum. We demonstrate the procedures for microinjection of parasites into the intestinal organoid lumen and immunostaining of organoids. Finally, we describe the isolation of generated oocysts from the organoids.
02:33
A Technique to Develop a Parasite Infection in Intestinal Organoids via Microinjection
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2025
This video demonstrates a microinjection technique to develop a human intestinal organoid infection model. The infectious sporozoite stage of the parasite Cryptosporidium parvum is microinjected into the organoid lumen. Upon invading the epithelial cells of the organoid, it undergoes asexual and sexual reproduction to complete its life cycle and spreads the infection.
08:01
Glass Wool Filters for Concentrating Waterborne Viruses and Agricultural Zoonotic Pathogens
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Cited by 31 •
2012
Glass wool filters have been used to concentrate waterborne viruses by a number of research groups around the world. Here we show a simple approach for constructing glass wool filters and demonstrate the filters are also effective in concentrating waterborne viral, bacterial and protozoan pathogens.
FAQs
Environmental resistance allows C. parvum oocysts to persist outside the host and supports transmission through contaminated water or food. After ingestion, the oocyst serves as the source of sporozoites that initiate intestinal infection. This stage links environmental survival with host entry and explains why outbreak prevention must address contamination before exposure occurs.
Development within intestinal epithelial cells can damage the tissue and alter its normal handling of fluids. These changes interfere with fluid absorption and contribute to profuse, watery diarrhea. The connection between epithelial injury and altered absorption makes the intestinal lining a central site for understanding both disease symptoms and host-pathogen interactions.
Control depends on several layers of intestinal defense rather than one immune component. Physical barriers limit interaction with epithelial tissue, antibodies participate in targeted responses, and T cells contribute cellular immune activity. Studying how these defenses act alongside epithelial responses helps immunologists explain why infection is contained in some hosts but becomes more severe in others.
Immunocompromised individuals may have reduced ability to control intestinal infection through barrier, antibody, or T-cell responses. When these defenses are less effective, parasite development and epithelial injury can have greater consequences, including more serious fluid loss from diarrhea. This risk makes C. parvum a useful model for examining how immune status shapes infection outcomes.
A useful investigation follows the sequence from ingestion of environmentally resistant oocysts to sporozoite emergence, epithelial attachment, intracellular development, and production of new oocysts. Researchers can then relate this cycle to epithelial damage, altered absorption, and immune control. Tracking these linked events connects parasite biology with symptoms, shedding, and potential transmission.
Research on C. parvum clarifies how contamination can lead to intestinal infection and renewed oocyst release in feces. That knowledge supports investigation of transmission pathways and informs efforts to prevent outbreaks associated with water or food. The same work also identifies host immune responses and vulnerable populations that are important when assessing disease risk.