BALF ratios of IL-8/IL-10, IL-1β/TGF-β1, TNF-α/TGF-β1, IL-8/TGF-β1, MCP-1/TGF-β1 and MCP-1/IL-1RA, and blood levels of IL-8 and IL-10 and were significantly higher in pure PJP patients with ventilator. This evidence concerns the gene CXCL8 and pneumocystosis.