Bacteria in school dust affects children's lung health

• High levels of bacteria in classroom dust are associated with breathing problems
• The study involved 4,739 children from 22 European countries
• The association remained significant after accounting for other factors
• The importance of cleanliness and ventilation in schools was emphasized

An international scientific team conducted a large-scale study of air quality in schools across Europe, focusing on the microbial composition of dust in educational settings. The analysis included data from 22 countries, covering 4,739 students and 294 classrooms. The results indicate a direct link between the presence of certain microorganisms in the air and a decline in respiratory function in children.

Researchers paid special attention to the bacteria of the genera Streptomyces and Mycobacterium — microorganisms typically found in soil and dust. The increased concentration of these pathogens in classrooms was statistically associated with a decline in lung function among schoolchildren. Scientists note that this association persisted even after excluding the influence of other factors that could have distorted the results.

In processing the data, researchers used a methodology to adjust for various variables that can independently affect respiratory health. Among them are the body mass index of children, the presence of pet allergens in the classroom, the level of outdoor air pollution, and the age of the school building itself. Despite these adjustments, the statistical significance of the relationship between microbial contamination of dust and lung function did not disappear.

Practical significance of the study

The data obtained highlight the importance of hygiene in school environments and air quality for the development and health of children. Schools spend a significant amount of time in enclosed spaces where dust and various microorganisms accumulate. The study suggests that regular cleaning and proper ventilation of classrooms can help prevent respiratory problems among students.

Streptomyces are actinomycetes, widely distributed in nature and playing an important role in the decomposition of organic matter. Mycobacterium includes both harmless species and pathogenic organisms, some of which can cause respiratory diseases. Inhalation of spores and particles from these bacteria can provoke inflammation in the airways and reduce lung efficiency.

The results of the study were presented at the annual conference of the European Respiratory Society, highlighting the relevance of the issue for the medical community. Experts point to the need for implementing cleanliness and ventilation standards in school buildings, especially in countries with high levels of environmental pollution or old infrastructure.

Source: N+1