OBJECTIVE To observe the effect of multidrug-resistant bacteria health care-associated infections(HAIs)on length of hospital stay and hospitalization expenses and evaluate the economical losses induced by the multidrug-resistant bacteria HAIs.METHODS In 2012 and 2013,a retrospective survey was conducted to collect the related data of the patients with multidrug-resistant bacteria HAIs and the patients without multidrug-resistant bacteria HAIs,and the occurrence tendency of HAIs,length of hospital stay,and h...