Research Progress of Mechanism of PM2.5 Effects on the Body / 沈阳医学院学报

ABSTRACT

PM2.5 is composed of a particulate and gaseous pollutants in the air reaction, can carry a lot of material, including inorganic composition, organic compounds, trace metal elements, the carbon composition, biomass (bacteria, viruses, mold, etc.), can cause more bad influence.When pathogenic microorganisms carried by particles in the body, cause the function of cells and tissues, metabolism and the change of the structure, increase the sensitivity of bacteria, virus infection, make the body’ s resistance drops, induce infectious diseases. After when it enters the body of the respiratory tract, can colonize in the human respiratory tract mucous membrane surface, lower the pH, more easily cause the engraftment of gram-negative pathogenic bacteria and conditional pathogenic bacteria,then cause respiratory tract normal flora disorder.