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Neisseria spp. and AIDS

Neisseria meningitidis from various serogroups and two commensal neisseriae (N. sicca and N. perflava) were isolated from 15 patients at various stages of human immunodeficiency virus infection in this clinical and bacteriological study. The cases were grouped into the following three classes: (i) infections with an N. meningitidis strain of a serogroup known to be pathogenic (A, B, or C) and apparently independent of the human immunodeficiency virus infection, (ii) infections with a N. meningitidis strain of a serogroup which is normally either commensal or poorly pathogenic (serogroups Y, X, Z, and Z,29E), (iii) pulmonary and disseminated infections occurring in the course of the clinical evolutionary stage of AIDS, in two cases of which commensal neisseriae (N. sicca and N. perflava) were isolated from blood cultures.