Abstract: The present invention relates to a process for determining in vitro the immune status of an individual according to which: (a) a blood sample from the individual is provided, (b) at least two reagents specific to at least two products of expression of at least two target genes are provided; (c) the expression of said at least two target genes is determined, and (d) the expression of said at least two target genes respectively is compared with a reference expression, with a change in the expression of said at least two target genes relative to their reference expression indicating that the individual's immune status has changed, and a correlation between the expression of said at least two target genes with their reference expression indicating that the individual's immune status is normal; as well as a kit for determining said immune status of the individual.

Abstract: The present invention relates to a process for determining in vitro the immune status of an individual according to which: (a) a blood sample from the individual is provided, (b) at least two reagents specific to at least two products of expression of at least two target genes are provided; (c) the expression of said at least two target genes is determined, and (d) the expression of said at least two target genes respectively is compared with a reference expression, with a change in the expression of said at least two target genes relative to their reference expression indicating that the individual's immune status has changed, and a correlation between the expression of said at least two target genes with their reference expression indicating that the individual's immune status is normal; as well as a kit for determining said immune status of the individual.

Abstract: A method and a kit for establishing an in vitro prognosis on a patient exhibiting SIRS, the method comprising: (i) measuring the level of expression of the CX3CR1 gene in vitro from the biological material of a patient sample by bringing into contact said sample with a specific reagent of the CX3CR1 gene; and (ii) comparing the expression level of the CX3CR1 gene of the patient to a predetermined expression threshold; wherein (iii) if the expression level of the CX3CR1 gene of the patient is less than the predetermined expression threshold, the survival prognosis of the patient is poor, and if the expression level of the CX3CR1 gene of the patient is greater than the predetermined expression threshold, the survival prognosis of the patient is good.

Abstract: The present invention relates to a process for determining in vitro the immune status of an individual according to which: (a) a blood sample from the individual is provided, (b) at least two reagents specific to at least two products of expression of at least two target genes are provided; (c) the expression of said at least two target genes is determined, and (d) the expression of said at least two target genes respectively is compared with a reference expression, with a change in the expression of said at least two target genes relative to their reference expression indicating that the individual's immune status has changed, and a correlation between the expression of said at least two target genes with their reference expression indicating that the individual's immune status is normal; as well as a kit for determining said immune status of the individual.

Abstract: A method and a kit for establishing an in vitro prognosis on a patient exhibiting SIRS, the method comprising: (i) measuring the level of expression of the CX3CR1 gene in vitro from the biological material of a patient sample by bringing into contact said sample with a specific reagent of the CX3CR1 gene; and (ii) comparing the expression level of the CX3CR1 gene of the patient to a predetermined expression threshold; wherein (iii) if the expression level of the CX3CR1 gene of the patient is less than the predetermined expression threshold, the survival prognosis of the patient is poor, and if the expression level of the CX3CR1 gene of the patient is greater than the predetermined expression threshold, the survival prognosis of the patient is good.

Abstract: A method for determining a patient's susceptibility of contracting a nosocomial infection that includes obtaining a biological sample from the patient and extracting biological material from the biological sample; preparing a specific reagent of an expression product of at least one target gene selected from S100A9 and S100A8 target genes; and determining the expression of at least one of the target genes S100A9 and S100A8, where overexpression relative to a specified threshold value indicates susceptibility of contracting a nosocomial infection.