History of the development of hygiene

Evolution of Hygienic Concepts

For many years, environmental hygiene was built on the pursuit of complete, uncompromising protection of humans from any negative impacts. However, the unprecedented growth of the anthropogenic load over the past hundred years has shown that the absolute safety strategy is utopian. The human body is forced to continuously engage its adaptive reserves, adapting to changing conditions. When these physiological reserves are depleted, adaptation failure occurs, which poses a direct threat to health and life.

In this connection, by the 1990s a historic turning point occurred: a shift toward the concept of relative safety. Modern science recognizes that environmental and physiological hazards cannot be completely eliminated, so the main goal is to reduce danger to the level of acceptable risk. Risk is regarded as the probability of harm to humans or nature. For example, the modern assessment of carcinogenic hazard allows an individual lifetime risk at a level of one to ten additional cases of cancer per million people.

State Control and Monitoring

The sharp deterioration of demographic indicators and environmental conditions by the end of the twentieth century required new management tools. In 1994, the Government of the Russian Federation adopted Resolution No. 1146, initiating social and hygienic monitoring (SHM).

This state system of continuous observation and analysis permeates all levels—from municipal to federal. Its key task is to search for cause-and-effect relationships between the health status of the population and its environment. By analyzing the obtained data, the sanitary and epidemiological service can predict trends and scientifically substantiate decisions to ensure public well-being.

Biological Markers as an Assessment Tool

For precise control of the body's interaction with the environment, modern hygiene uses specific indicators—biological markers. In practice, they are divided into three functional groups:

• Biomarkers of exposure. Indicate the actual fact of contact with an exogenous chemical substance. These can be the toxins themselves or their metabolites found in saliva, blood, or urine. Complexes of substances with DNA or serum proteins are considered the most sensitive. A classic example is the detection of mercury in urine or methemoglobin in blood after inhaling nitrogen oxides.
• Biomarkers of effect. Reflect quantitative changes in physiology, biochemistry, or behavior. They help identify the risk of developing a disease and detect pathology at a latent stage when clinical manifestations are not yet present.
• Biomarkers of susceptibility. Show a person's genetic or acquired readiness (hyperreactivity) to react violently to a specific irritant. A striking example is skin allergy tests confirming sensitization.

Risk Analysis Methodology and Ecological Context

To select effective health protection measures, a strict algorithm—risk analysis—is applied. This is a continuous process in which a two-way exchange of data constantly takes place. It includes three key elements:

1. Risk assessment: hazard identification, exposure scale calculation, and final threat characterization.
2. Risk management: comparison of alternative risks, implementation of corrective actions, and monitoring of their effectiveness.
3. Risk communication: dialogue and exchange of views on ways to eliminate the hazard among all interested parties.

At this stage, hygiene closely interacts with ecology, in particular with human ecology and medical ecology. The latter specifically studies diseases caused by environmental pollution (physical, natural-anthropogenic, and social factors). Population health in a specific area serves as the best and most objective indicator of the state of the local ecosystem.

Briefly: answers to topical questions

Class and exam questions

What else to study on this topic

• Detailed classification of harmful properties of chemical substances (carcinogenic, teratogenic, mutagenic action).
• Mechanisms of human body adaptation to anthropogenic environmental factors.
• Structure and tasks of medical ecology as an adjacent scientific discipline.
• Regulatory framework of technical regulation and risk concepts (Federal Law No. 184-FZ).
• Habitat factors: analysis of physical, social, and natural-anthropogenic components.

Other topics in the section "Introduction. Subject, History, Modern Environment"

Prepared by WhiteCoat Pro faculty in accordance with the medical school curriculum. For educational purposes only.