A new study underscores the importance of indoor air quality at schools, with the suggestion that children exposed to classroom dust with higher levels of two common bacterial pathogens have slightly impaired lung function.
For the study, presented at the European Respiratory Society (ERS) Congress in Barcelona, Spain, the researchers analyzed data from the Schools Indoor Pollution and Health: Observatory Network in Europe (SINPHONIE) project.
The study measured levels of Streptomyces and Mycobacterium species in dust in nearly 300 classrooms in 22 European countries. The two kinds of bacteria are commonly found in soil, dust, and water systems.
The team also used spirometry to test the lung function of children from each classroom to calculate the volume of air the lungs can hold and how quickly that volume of air can be exhaled.
“We know that indoor air quality in schools can be affected by pollutants, humidity, ventilation, temperature, dampness, and biological agents like fungi and bacteria,” presenter Soutrik Banerjee, MS, of the University of Ferrara in Italy and French engineering firm Alten, said in an ERS news release. “However, much less is known about whether the types of bacteria growing in classroom dust are linked to children’s lung function.”
Impairment was modest
Children in classrooms with higher concentrations of Streptomyces had a slightly lower forced vital capacity, a measure of how much air a person can blow out after taking a deep breath.
