OBJECTIVE To investigate the inhibiton of small interfering RNA(siRNA) aimed at rhlI gene on guinea pigs infection by Pseudomonas aeruginosa biofilm.METHODS After guinea pigs model with Pseudomonas aeruginosa biofilm infection being made by trachea injection,18 of model guinea pigs were randomly assigned to three groups,which were injected through tail vein by mixture of siRNA(50 μg.mL 1) and liposome(siRNA group),ciprofloxacin lactate(ciprofloxacin group),or 0.9% NaCl(control group).Histopathological chang...