Hospital infection (IH) is that one acquired by the patient after its hospital admission, exactly that if it reveals the high one after, since that related with hospitalization. If the incubation period will be unknown and it will not have clinical or laboratorial evidence of infection at the moment of the admission, will be considered as hospital infection, the corresponding clinical manifestation that occurs 72 hours of internment after. However, if the infectious process will be related with the procedures diagnosis and/or therapeutical practised and if to reveal before this period, also will be considered as hospital infection. The 4 hospital infections are classified in 5:5 – Infection prevenveis, described as those passveis to be controlled, that is, that they can be intervened with the chain of transmission of the microorganisms for simple measures as laudering of the hands, as well as the equipment use of individual protection. – Infection no-prevenveis, is those that basically depend on the host and its immunity and not in such a way of the external factors, generally when the patients meet imunodeprimidos; – Infection crossed, is the transmitted infection of patient for patient generally for intermediary of health professionals, ways of devices of contact between same or the many times for the laudering lack them hands between professionals, as well as the visitors it hospital, in which also hospital infection is considered.

hospital infections in unit of intensive therapy are generated by the barrier in addition through the risk procedures. Being provoked for the following represented agents below. 6 Staphylococcus spp; Enterococcus spp; Enterobacteriaceae. The patients interned in units of intensive therapy are of high risk, which had to its state of imunolgica deficiency, as resulted of invasive the therapeutical and disgnostic procedures, and are particularly susceptveis the hospital infections. The normal barriers of the skin and mucosae against infections can be engaged for the presence of endotraqueais pipes and vascular catheters, fabrics desvitalizado by decubitus ulcers or the fabric were removed by debridamento (removed of fabric necrosado, that is, died) surgical and burnings, as well as and normally barren small farms can be invaded by catheters intravasculares, urinrios catheters and drains.