... AccessResearch Hyperresponsiveness to inhaled but not intravenous methacholine during acute respiratory syncytial virus infection in miceRachel A Collins1, Rosa C Gualano2, Graeme R Zosky1, Constance L Atkins3, ... poly-L-lysine and poly-L-arginine) increased airway responsiveness to inhaled MCh in rats [47], further investigation in isolated airwaysrevealed that hyperresponsiveness was induced only ifMCh ... Rios AM, Nassi SS,Yusuf M, Kapur P, Hardy RD, Hatfield et : Respiratory syncytial virus induces pneumonia, cytokine response, airway obstruc-tion, and chronic inflammatory infiltrates associated...