title: [Compromised host].
abstract: The number of immunocompromised host has been increasing recently. In this article, the defect of host-defence system, immune system and the way to prevent infections in these host were reviewed.
authors.affiliation: First Department of Internal Medicine, School of Medicine, Kyorin University.
authors.forename: Hisashi
authors.initials: H
authors.lastname: Igarashi
authors.forename: Hajime
authors.initials: H
authors.lastname: Goto
mesh_terms: D019072:Antibiotic Prophylaxis; D000917:Antibody Formation; D003428:Cross Infection / Q000517:prevention & control; D006801:Humans; D007111:Immunity, Cellular; D016867:Immunocompromised Host / Q000276:immunology; D017053:Infection Control / Q000379:methods; D009894:Opportunistic Infections / Q000209:etiology / Q000517:prevention & control