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Related Concept Videos

Hepatitis01:25

Hepatitis

Hepatitis is an inflammatory condition of the liver most commonly caused by hepatotropic viruses (A–E), though non-infectious causes such as alcohol and drugs also exist.Hepatitis AHepatitis A virus (HAV) is a non-enveloped RNA virus of the Picornaviridae family. It is primarily transmitted via the fecal-oral route, typically through ingestion of contaminated food or water. After ingestion, HAV enters the bloodstream through the oropharynx or intestinal epithelium and reaches the liver. The...

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Hepatitis A virus: a test method for virucidal activity.

M H Wolff1, J Schmitt, M Rahaus

  • 1Institute for Microbiology and Virology, University Witten/Herdecke, Germany. Whwolff@uni-wh.de

The Journal of Hospital Infection
|January 5, 2002
PubMed
Summary

Hepatitis A virus (HAV) is a stable virus, making it a potential model for testing hand disinfectants. Current methods using poliovirus may be replaced by HAV, but two tested disinfectants lacked sufficient virucidal activity.

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Area of Science:

  • Virology
  • Microbiology
  • Infectious Diseases

Background:

  • Hepatitis A virus (HAV) shares characteristics with enteroviruses and exhibits high resistance to environmental factors.
  • Human poliovirus is a standard model for disinfectant efficacy testing, but HAV is being considered as an alternative.
  • HAV's stability and resistance make it a relevant candidate for evaluating disinfectant effectiveness.

Purpose of the Study:

  • To develop a reliable method for using adapted Hepatitis A virus (HAV) to assess the efficacy of hand disinfectants.
  • To evaluate the suitability of HAV as a model virus for disinfectant testing, potentially replacing poliovirus.

Main Methods:

  • Utilized HAV strains HM175/24a and FRhK-4 for disinfectant testing.
  • Observed cytopathic effects (CPE) in cell cultures, noting rare occurrences and a 14-day observation period.
  • Developed a reverse transcription-polymerase chain reaction (RT-PCR) assay to confirm virus replication in cells.

Main Results:

  • Cytopathic effects for HAV strains were infrequent and appeared after 14 days of incubation.
  • RT-PCR confirmed virus growth in cell cultures, validating the cell-based assay.
  • Two tested hand disinfectants failed to demonstrate adequate virucidal activity according to German guidelines.

Conclusions:

  • Adapted HAV strains can be used to develop methods for testing hand disinfectant efficacy.
  • The current German guidelines for disinfectant virucidal activity may not be met by all tested products when using HAV.
  • Further research is needed to optimize HAV-based methods for disinfectant evaluation and potentially replace poliovirus models.