Data on occurrence of antimicrobial resistant bacteria acquisition in rehabilitation centers will be collected. After removal of patient identifiers, information regarding the patients population will be entered into electronic sheet. The phase will last twelve months in each center.

All patients admitted to the department will be examined on admission, two weeks latter and monthly by obtaining nares and perirectal cultures. These cultures will be processed for detection the target organisms. This activity is part of the good medical practice and is performed on routine basis in various hospital units

Epidemiological data will be collected from patient records. This data will be stored after removal of all patients' identifiers. These data will be transferred for analysis to Tel Aviv Medical Center

Inclusion Criteria:

• Hospitalized patients are older then 18 years old

Exclusion Criteria:

• Age 18 years or less

A rehabilitation center's department in which the hospitalized patients are older then 18 years old.