title: [Impact of different traffic crossroads exhaust pollution on immune function of the school-age children in Taiyuan City].
abstract: OBJECTIVE
  to discuss the impact of different traffic crossroad exhaust pollution on the immune function of school-age children.
  
  
  METHODS
  A school in the heavy traffic polluted area and B school in the less traffic polluted area were selected. Total 142 students from five to six grades in both areas were sampled. The level of peripheral blood cells (WBC, lymphocytes, neutral cells, red blood cells, platelets) and the T lymphocyte subpopulations (the percentages of CD3+, CD4+, CD8+ and the ratio of CD4+/CD8+), saliva lysozyme contents and immunoglobulin content were determined.
  
  
  RESULTS
  Except for neutral cells, the peripheral blood cells level (WBC, lymphocytes, red blood cells, platelets) of children in the A school were higher than those in the B school. The contents of saliva lysozyme, immunoglobulin (IgG), T lymphocyte subpopulations (the percentages of CD3+, CD4+ and the ratio of CD4+/CD8+) in the A school were lower than those in the B school (P < 0.05).
  
  
  CONCLUSIONS
  Exhaust pollution of different traffic crossroads could inhibit nonspecific immunity and cell immunity, and impact the level of blood cells and humoral immunity.
authors.affiliation: School of Public Health, Shanxi Medical University, Taiyuan 030001, China. gllmm3295@163.com
authors.forename: Lili
authors.initials: L
authors.lastname: Guo
authors.forename: Zhihong
authors.initials: Z
authors.lastname: Zhang
authors.forename: Jie
authors.initials: J
authors.lastname: Dong
authors.forename: Jingfeng
authors.initials: J
authors.lastname: Mu
authors.forename: Zhirong
authors.initials: Z
authors.lastname: Zhang
authors.forename: Linyan
authors.initials: L
authors.lastname: Guo
authors.forename: Zhijiao
authors.initials: Z
authors.lastname: Song
authors.forename: Xuan
authors.initials: X
authors.lastname: Wang
authors.forename: Jianwei
authors.initials: J
authors.lastname: Gao
authors.forename: Yanjun
authors.initials: Y
authors.lastname: Ren
mesh_terms: D000393:Air Pollutants / Q000009:adverse effects*; D002648:Child; D002681:China; D002947:Cities; D004781:Environmental Exposure / Q000009:adverse effects*; D005260:Female; D006801:Humans; D007136:Immunoglobulins / Q000097:blood*; D008297:Male; D009113:Muramidase / Q000378:metabolism; D012463:Saliva / Q000378:metabolism; D012494:Sampling Studies; D016176:T-Lymphocyte Subsets / Q000276:immunology*; D001335:Vehicle Emissions / Q000032:analysis*
chemical_list: D000393:Air Pollutants; D007136:Immunoglobulins; D001335:Vehicle Emissions; D009113:Muramidase