Links to NHSN/CDC Definitions
The National Reference Center for Surveillance of Nosocomial Infections uses the same definitions for diagnosis in KISS as the Centers for Disease Control in the USA uses for the National Healthcare Safety Network. A very few surgical site infections are tracked only by KISS and not by the NHSN; see the protocols of each module for these exceptions.
The 2008 version of the definitions for most HAI can be found here.
Definitions of the degrees of surgical site infection can be found here.
Updated definitions for urinary tract infections can be found here.
A few key terms also used by KISS (ASA score, for example) are outlined here.