Prospective observational cohort consisting of all adult patients admitted to participating critical care units (ICU and CCU) during the study period, with blood cultures collected as part of their care, and who did not express any objection to participating.

For each patient, data will be collected prospectively for each blood culture set collected.

Inclusion Criteria:

• Male or female, age 18 years or older
• Patient admitted to an ICU or ICU
• patient with a blood culture sample as part of care

Exclusion Criteria:

• Patient already included in this study during a previous hospitalisation
• Opposition expressed for participation in the study

critical care patient with suspected infection.