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Hepatitis A virus infection associated with cannabis use
Summary
A Hepatitis A virus (HAV) infection case was linked to cannabis use. Genetic sequencing confirmed the virus strain in the patient matched that found on his cannabis supply, suggesting a potential transmission route.
Area of Science:
- Hepatology
- Virology
- Public Health
Background:
- Hepatitis A virus (HAV) infection presents with classic hepatitis symptoms.
- HAV is typically transmitted through the fecal-oral route via contaminated food or water.
- Investigating novel transmission routes is crucial for public health interventions.
Purpose of the Study:
- To investigate a potential link between cannabis use and acute Hepatitis A infection.
- To identify the source of infection in a patient with no other clear risk factors.
- To analyze the genetic relationship between HAV in a patient and their cannabis supply.
Main Methods:
- Case investigation including detailed patient history and risk factor assessment.
- Clinical laboratory testing for Hepatitis A virus infection (anti-HAV IgM).
- Viral elution from cannabis leaves and genetic sequencing.
- Comparison of viral sequences from patient serum and cannabis sample.
Main Results:
- A patient presented with acute Hepatitis A, with no identified common risk factors.
- Genetic sequencing revealed identical Hepatitis A virus sub-genotype 1B strains in the patient's serum and cannabis sample.
- The identified viral strain was unique and did not match other known Canadian isolates.
Conclusions:
- Cannabis use is a potential, albeit unconfirmed, source for Hepatitis A virus transmission.
- HAV can remain viable on dried plant material for extended periods.
- Further research is warranted to understand the role of cannabis in HAV transmission.
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