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Related Experiment Video

Updated: Jun 20, 2026

A Cell Culture Model for Producing High Titer Hepatitis E Virus Stocks

A Cell Culture Model for Producing High Titer Hepatitis E Virus Stocks

Published on: June 26, 2020

Virulence factor activity relationships for hepatitis E and Cryptosporidium.

Ronald Fayer¹, Palmer Orlandi, Michael L Perdue

¹United States Department of Agriculture, Animal and Natural Resources Institute, Environmental Microbial Safety Laboratory, Beltsville, MD 20705, USA. ronald.fayer@ars.usda.gov

Journal of Water and Health

|September 1, 2009

Summary

Hepatitis E virus (HEV) and Cryptosporidium are waterborne pathogens with complex disease factors. Research is ongoing to identify virulence factors for both HEV and Cryptosporidium to understand their pathogenicity.

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Studying Cryptosporidium Infection in 3D Tissue-derived Human Organoid Culture Systems by Microinjection

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Published on: September 14, 2019

Area of Science:

Environmental microbiology
Infectious diseases
Parasitology

Background:

Hepatitis E virus (HEV) and Cryptosporidium are significant waterborne pathogens.
These pathogens exhibit diverse taxa, genotypes, and isolates, infecting humans and animals.
The factors contributing to disease development are complex and not fully understood.

Purpose of the Study:

To explore the complex factors influencing disease caused by HEV and Cryptosporidium.
To investigate potential virulence factors for HEV and Cryptosporidium.

Main Methods:

Comparative analysis of pathogen traits (taxon, genotype, isolate).
Assessment of host-related factors (age, immune status, physiology).
Review of recent genetic discoveries related to Cryptosporidium virulence.

Main Results:

Disease association varies among HEV and Cryptosporidium isolates.
Pathogenicity is influenced by a combination of pathogen traits, infectious dose, and host factors.
No specific virulence factors have been identified for HEV yet.

Conclusions:

Understanding HEV and Cryptosporidium pathogenicity requires investigating both pathogen and host factors.
Further research into Cryptosporidium genes involved in host cell interaction may reveal virulence factors.
Identifying virulence factors is crucial for developing effective control strategies against these waterborne diseases.