Historical and epidemiological background
The development of the epidemic in the country has a clear chronology and is associated with changing leading risk factors.
At the initial stage, after the detection of the first patient in 1987, the population prevalence remained low, and circulating virus strains showed no pronounced molecular genetic diversity. A sharp epidemic surge and large-scale spread of the infection occurred later when the virus penetrated the population of people who inject drugs (PWID).
Since 2009, the epidemiological situation has been assessed as consistently strained. According to statistics from the specialized Federal Center, by the end of 2011, the number of infected individuals had already exceeded 619 thousand people. Although the virus is registered in absolutely all constituent entities of the Russian Federation, the territorial distribution remains extremely uneven—there are pronounced endemic regions.
Demographic profile and specifics in the Russian Federation
The epidemic in Russia follows global trends but has a number of distinct local characteristics. The infection affects the most active part of society. The dominant age cohort remains young people aged 15–30 (82%), yet a significant stratum of patients aged 30–40 is also forming (about 40% of Russian citizens with this diagnosis).
Key features of the domestic epidemic process:
- Feminization: Women of reproductive age are being actively involved in the process.
- Obstetric and pediatric aspect: The prevalence of the virus among pregnant women reaches 0.46%. Changes in reproductive behavior (the desire to carry the pregnancy to term) naturally increase the cohort of children at high risk of infection through the vertical transmission route.
- Increasing need for treatment: There is a sharp increase in the number of patients in need of highly active antiretroviral therapy (HAART). This is due to the natural progression of disease stages in those who were infected during the epidemic surge in 2000–2001.
High-vulnerability groups
Historically, high incidence is concentrated in specific populations where parenteral and sexual transmission routes occur. Key risk groups include:
- People who inject drugs (PWID).
- Commercial sex workers (CSWs).
- Men who have sex with men (MSM).
- Individuals with polygamous sexual behavior.
- Inmates of penitentiary institutions (correctional facilities).
A critical epidemiological factor of modern times is the spillover of the infection into the general population. This occurs predominantly through sexual partners of individuals belonging to the listed vulnerable groups.
Prevention and infection control
Prevention measures are divided into specific clinical protocols and general sanitary and epidemiological measures.
- PEP (post-exposure prophylaxis): used after emergency situations associated with the risk of occupational or household exposure.
- PMTCT (prevention of mother-to-child transmission): a set of measures to prevent infection of the fetus and newborn.
- Disinfection: To prevent nosocomial transmission during the processing of surfaces and medical instruments, cationic surfactants (surfactants), specifically quaternary ammonium compounds (QACs), are used.
For practical healthcare, there is a universal rule: physicians of any specialty inevitably encounter HIV-infected patients due to the widespread nature of hidden carriage. Timely detection of the disease (for example, upon discovering prolonged fever of unknown origin, chronic diarrhea, or markers of opportunistic infections) directly depends on a thorough collection of the epidemiological history and professional clinical vigilance.
Briefly: answers to topical questions
What is the algorithm of actions for a healthcare worker in an emergency situation (contamination via a needle stick)?
In the event of an emergency situation, the healthcare worker must immediately stop the manipulation and perform local treatment. The algorithm includes the following steps:
- Processing in gloves — wash hands with soap under running water, then treat with a disinfectant.
- Removal of gloves — carefully remove them after disinfection.
- Processing of hands and wound — thoroughly wash hands with soap, rinse the wound abundantly with running water.
- Antisepsis — treat hands and the wound itself with hydrogen peroxide solution and 70% ethyl alcohol.
- Wound isolation — treat the wound edges with a 5% alcoholic iodine solution and apply an aseptic dressing.
After this, it is necessary to immediately report to the institution's administration and document the incident.
Risk groups are easy to remember by abbreviations: PWID (drugs), CSW (sex work), MSM (men). Their sexual partners act as a bridge to the general population.
Class and exam questions
What is the phenomenon of the «feminization» of the HIV epidemic?
This is the process of active involvement of reproductive-age women in the epidemic, which entails an increase in the number of HIV-positive pregnant women and raises the risk of vertical transmission of infection to children.
What classes of chemical substances are used to prevent nosocomial transmission of the virus?
Surfactants, primarily quaternary ammonium compounds (QACs), are used for the disinfection of surfaces and medical instruments.
Why is the need to prescribe antiretroviral therapy (ART) currently rising sharply?
This is due to the progression of the infection in a huge cohort of patients infected during the sharp rise in incidence in 2000–2001.
What else to study on this topic
- Pathogenesis of HIV infection: the role of CCR5 and CXCR4 receptors, T-helper cells
- Stage classification: from the acute phase to acquired immunodeficiency syndrome (AIDS)
- Opportunistic infections: tuberculosis, Kaposi's sarcoma, CMV infection
- Two-stage algorithm of laboratory diagnostics (ELISA, immunoblotting, PCR)
- Classes of antiretroviral drugs (NRTIs, NNRTIs, protease inhibitors)
Master the complete topic in the «Infectious Diseases» course
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Other topics in the section "Viral Hepatitis and HIV"
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