Evolution of the Lymphocyte Phenotype in Patients with Infection in Intensive Care Unit

"For all patients, lymphocyte phenotyping will be performed on biological samples taken on D0, D7 and the day of discharge. In case of infection, phenotyping will also be performed on the day of infection diagnosis and on the day corresponding to half the duration of antibiotic therapy.~For phenotyping, only 1.5 mL will be used. In case of infection, an additional 1mL will be collected (0.5mL on the day of inclusion diagnosis and 0.5 mL on the day corresponding to half the duration of antibiotic therapy). Blood is collected during sampling, which takes place several times a day as part of the standard management of these patients.~It is important to note that phenotyping is not routinely performed as part of routine care. An additional tube is therefore taken specifically for this analysis, but this is done without the need for an additional puncture."