CEACAM8 and allergic asthma: Several lines of evidence verify this claim: 1) CD66b cell-surface expression is upregulated in neutrophils from patients with allergic asthma and rhinitis in response to only the Ag which induce clinical symptoms, 2) Ags did not affect CD66b cell-surface expression in on human neutrophils from healthy subjects or from IT-treated patients with allergic asthma and rhinitis, and 3) The expression of CD66b on neutrophils from NLF was higher than those from peripheral blood.