Experimental protocol used for ovalbumin-induced allergic asthma (A) and reduction of eosinophils in BAL fluid from theophylline (TPL)-treated mice (B). BAL was performed and eosinophils were counted on day 22. The results of a representative experiment of two performed is shown. Cell counts were performed by different persons in a blinded fashion. CS denotes chitosan. (**p < 0.01, *p < 0.07 relative to TPL-thioCS).