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Risk factors for acute non-A, non-B hepatitis and their relationship to antibodies for hepatitis C virus: a
A Mele1, L Sagliocca, G Manzillo
1Istituto Superiore di Sanità, Laboratorio di Epidemiologia e Biostatistica, Roma, Italy.
Insights
Hepatitis C virus (HCV) infection is linked to surgical and dental procedures. Raw shellfish consumption may indicate an enteric virus in non-A, non-B hepatitis cases.
Area of Science:
- Hepatology
- Infectious Diseases
- Epidemiology
Background:
- Non-A, non-B hepatitis represents a significant public health concern.
- Identifying risk factors for hepatitis C virus (HCV) is crucial for prevention strategies.
Purpose of the Study:
- To investigate potential risk factors associated with non-A, non-B hepatitis, specifically focusing on hepatitis C virus (HCV) infection.
- To differentiate between transmission routes for HCV-positive and HCV-negative non-A, non-B hepatitis cases.
Main Methods:
- A case-control study design was employed, comparing 333 non-A, non-B hepatitis cases with 1095 hospital controls.
- Hepatitis C antibody (anti-HCV) testing was performed on all subjects.
- Statistical analysis, including odds ratios (OR) and 95% confidence intervals (CI), was used to assess risk factors.
Main Results:
- 59% of non-A, non-B hepatitis cases were positive for anti-HCV.
- Surgical interventions, particularly in obstetrics and gynecology, and dental therapy were significantly associated with anti-HCV positivity (OR = 32).
- Raw shellfish consumption was identified as a risk factor for anti-HCV-negative cases (OR = 2.2), suggesting an enterically transmitted virus.
Conclusions:
- Surgical and dental procedures are significant risk factors for hepatitis C virus transmission.
- Enteric transmission may play a role in sporadic non-A, non-B hepatitis cases, as indicated by raw shellfish consumption.
- Further research is needed to elucidate the specific viral agents involved in enterically transmitted non-A, non-B hepatitis.
Abstract:
A case-control study was carried out comparing 333 case subjects with non-A, non-B hepatitis and 1095 hospital control subjects. Of 333 case subjects, 197 (59%) were positive for hepatitis C antibody (anti-HCV). Excluding blood transfusion and intravenous drug use, surgical intervention and dental therapy were strongly associated with anti-HCV-positive cases: in particular, obstetric and gynecology surgical intervention was found to be strongly associated with HCV positivity (odds ratio [OR] = 32; 95% confidence interval [CI] = 7, 147). Raw shellfish consumption was a risk factor for anti-HCV-negative cases (OR = 2.2; 95% CI = 1.0, 5.1), thus suggesting an enterically transmitted virus in sporadic non-A, non-B hepatitis in Italy.