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Hepatitis C virus-specific immune responses in noninjecting drug users
M Zeremski1, J Makeyeva, K Arasteh
1Center for the Study of Hepatitis C, Division of Gastroenterology and Hepatology, Weill Cornell Medical College, New York, NY 10065, USA. maz2003@med.cornell.edu
Journal of Viral Hepatitis
|July 6, 2012
Summary
Hepatitis C virus (HCV) exposure was found in 27.5% of noninjection drug users (NIDUs). Sexual behaviors, not drug use itself, may be the primary risk factor for HCV acquisition in this population.
Area of Science:
- Hepatology
- Virology
- Immunology
Background:
- Noninjection drug use (NIDU) is an emerging risk factor for blood-borne pathogens.
- HCV transmission routes beyond injection drug use require further investigation.
Purpose of the Study:
- To assess Hepatitis C virus (HCV) exposure and prevalence in noninjection drug users (NIDUs).
- To investigate potential links between NIDU practices and HCV infection markers.
Main Methods:
- Screening of 57 NIDUs via questionnaire and HCV serologic testing.
- Evaluation of HCV-specific cellular immune responses using interferon-gamma (IFN-γ) ELISpot assay.
- Comparison with 15 non-drug using controls.
Main Results:
- 19.3% of NIDUs were HCV seropositive (chronic or resolved infection).
- 9.8% of NIDUs exhibited detectable HCV-specific cellular immunity.
- No direct association found between NIDU practices and HCV immune responses.
- HCV-specific immunity correlated with sexual behaviors, including partners who injected drugs.
Conclusions:
- A significant portion of NIDUs show evidence of HCV exposure.
- Sexual behaviors associated with NIDU may be a key route for HCV acquisition.
- Further research is needed to clarify specific transmission practices within this population.
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