[Intravenous drug users serologic control: what may be prevented?].

Area of Science:

• Infectious Diseases
• Public Health
• Epidemiology

Context:

• A serologic survey of injection drug users (IDUs) was conducted in the Fuenlabrada-Leganés Health-Care Area of Madrid, Spain, in 1997.
• This study compared the 1997 findings with a previous survey from 1990 to assess trends in infectious disease prevalence and prevention strategies.

Purpose:

• To evaluate the seroprevalence of HIV, HBV, HCV, and syphilis among IDUs in 1997.
• To compare these seroprevalence rates with those reported in 1990.
• To assess the effectiveness of hepatitis B virus (HBV) prevention efforts, including vaccination, within this population.

Summary:

• The 1997 survey of 233 IDUs revealed significantly lower seroprevalence rates compared to 1990: HBV (39.5% vs. 67.5%), HCV (49.3% vs. 75.1%), and HIV (11.1% vs. 50.1%).
• Despite the overall decline in infectious diseases, only 3.55% of HBV-seronegative individuals had protective antibody titers, indicating a low hepatitis B vaccination coverage.
• A small proportion of individuals with HBV markers had prior seronegative reports, with three cases of acute viral infection identified.

Impact:

• Demonstrates a significant reduction in the burden of key infectious diseases among IDUs in the Madrid region over a seven-year period.
• Highlights the persistent challenge of achieving adequate hepatitis B vaccination coverage in this high-risk population.
• Provides crucial data for public health interventions aimed at infectious disease control and prevention among injection drug users.