Particle analysis method for identifying infections

A particle analyzer for identifying infections, comprising:

• a light source for irradiating light on a measurement sample prepared by mixing a test blood specimen comprising particles, collected from a subject, a fluorescent dye that stains a nucleic acid, and a hemolytic agent, a detection unit for receiving scattered light and fluorescence from each particle comprised in the measurement sample generated by the irradiation, and a processing unit programmed for specifying particles that are substantially not comprised in blood of control subjects not suffering from infection and are determined to be neutrophils comprised in blood of patients with infection, based on the scattered light and the fluorescence, and acquiring particle number information on the specified particles, and further programmed for determining whether the test blood specimen is a specimen collected from patients with bacterial infection or a specimen collected from patients with viral infection, based on the particle number information.

A particle analyzer for identifying infections, comprising:

• a light source for irradiating light on a measurement sample prepared by mixing a test blood specimen comprising particles, collected from a subject, a fluorescent dye that stains a nucleic acid, and a hemolytic agent, a detection unit for receiving scattered light and fluorescence from each particle comprised in the measurement sample generated by the irradiation, and a processing unit programmed for specifying particles that are substantially not comprised in blood of control subjects not suffering from infection and are determined to be neutrophils comprised in blood of patients with infection, based on the scattered light and the fluorescence, and acquiring particle number information on the specified particles, outputting the particle number information, and further programmed for determining whether the test blood specimen is a specimen collected from patients with bacterial infection or a specimen collected from patients with viral infection.