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Gingival biopsies were taken from 27 HIV (human immunodeficiency virus)-seropositive persons with gingivitis or periodontitis and 16 HIV-seronegative persons with periodontitis. Sections were stained with hematoxylin and eosin or periodic acid-Schiff. Candidal hyphae and pseudohyphae were found in the parakeratinized oral epithelium in 7 specimens from the HIV-infected patient group and in the connective tissue close to the bottom of the gingival pocket in one such specimen. No fungal invasion was found in any of the biopsies from the HIV-seronegative persons. Candidal invasion was significantly more frequent (P<0.05) in patients with a confirmed history of necrotizing periodontal diseases (5/9) than in patients without known episodes of such diseases (3/18). The most prominent histopathologic changes observed in connection with candidal invasin comprised polymorphonuclear leucocyte infiltration of the oral gingival epithelium and numerous mitoses, some of which were located suprabasally. It is suggested that Candida albicans may contribute to the development of necrotizing periodontal diseases in HIV-infected persons. [ABSTRACT FROM AUTHOR]

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