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Prevalence of active hepatitis C virus infection in patients with systemic lupus erythematosus
M Mubashir Ahmed1, Seth Mark Berney, Robert E Wolf
1Center of Excellence for Arthritis and Rheumatology, Department of Medicine, the Section of Infectious Diseases, Louisiana State University Health Sciences Center, Shreveport, Louisiana 71130-3932, USA. mahmed3@lsuhsc.edu
Insights
Hepatitis C virus (HCV) infection is more prevalent in patients with systemic lupus erythematosus (SLE) than in the general population. Testing for HCV is recommended when SLE is suspected.
Area of Science:
- Immunology
- Hepatology
- Rheumatology
Background:
- Hepatitis C virus (HCV) infection is linked to autoimmune conditions.
- HCV can present with symptoms mimicking systemic lupus erythematosus (SLE).
- Limited data exists on HCV prevalence in SLE patients.
Purpose of the Study:
- To determine the prevalence of HCV viremia in SLE patients.
- To compare HCV prevalence in SLE patients to control groups.
Main Methods:
- Sera from 40 SLE patients (1993-2000) were tested for HCV viral load using PCR.
- HCV prevalence was compared to local blood donors and the US general population.
Main Results:
- HCV was detected in 10% (4/40) of SLE patients.
- HCV prevalence in SLE patients was significantly higher than in local blood donors (0.13%) and the US general population (1.33%).
Conclusions:
- Findings support an increased prevalence of HCV infection in SLE patients.
- Further research into the association may elucidate SLE pathogenesis.
- HCV screening is advised when considering an SLE diagnosis.
Objective:
Hepatitis C virus (HCV) infection is associated with various autoimmune disorders and can mimic systemic lupus erythematosus (SLE) clinically and serologically. There are few reports of prevalence of HCV infection in patients with SLE. The aim of this study was to determine the prevalence of HCV viremia by polymerase chain reaction (PCR) in patients with SLE.
Methods:
We tested sera from 40 consecutive patients with SLE collected from 1993 to 2000. All of the patients had HCV viral load measured by PCR. The results were compared with the prevalence of HCV viremia in a control group of blood donors in our geographic area as well as in United States general population.
Results:
HCV was detected in 4 of 40 patients (10%). The prevalence of HCV in our area blood donors is 130 cases per 100,000 persons (0.13%; P<0.0001). The prevalence of HCV infection in the United States general population, screened by PCR, is 1330 cases per 100,000 people (1.33%; P=0.002). The prevalence of HCV infection was significantly higher in our SLE patients than in our area blood donors. The frequency of HCV infection was also higher than that of the United States general population.
Conclusion:
Our observations support those of other investigators who have reported an increased prevalence of HCV infection in SLE patients. Further detailed investigation of this association may help in understanding the pathogenesis of SLE. HCV infection should be tested when the diagnosis of SLE is considered.
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