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M9490573.TXT
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1994-09-24
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Document 0573
DOCN M9490573
TI Olfactory mucosa response in guinea pigs following intranasal
instillation with Cryptococcus neoformans. A histological and
immunocytochemical study.
DT 9411
AU Lima C; Vital JP; Laboratory of Experimental Microsurgery, Hospital Egas
Moniz,; Lisbon, Portugal.
SO Mycopathologia. 1994 May;126(2):65-73. Unique Identifier : AIDSLINE
MED/94344220
AB A central nervous system isolate from an acquired immunodeficiency
syndrome (AIDS) patient of 10(3) Cryptococcus neoformans cells was
instilled intranasally into guinea pigs. These were killed to evaluate
the fate of the organisms and the response of the olfactory mucosa.
Olfactory epithelium prevented the penetration of Cryptococcus
neoformans and showed focal hyperplastic responses. The organisms, which
manifested an affinity for the olfactory portion of the nasal cavities,
were cleared from the olfactory space with no intervention from the
immune system cells. By the end of the fifth week almost no organisms
could be found and there was no histological evidence of dissemination.
In contrast, destruction of the olfactory epithelium with zinc sulfate
allowed the invasion of the subepithelial tissues, demonstrating the
role of the olfactory mucosa in preventing infection with Cryptococcus
neoformans through the nasal route. The results and the model described
in this report may be useful in clarifying the pathogenic mechanisms of
cryptococcosis and the non immune mediated host responses to
Cryptococcus neoformans.
DE Adult Animal AIDS-Related Opportunistic Infections/CEREBROSPINAL
FLUID/ MICROBIOLOGY Case Report Cryptococcosis/CEREBROSPINAL
FLUID/MICROBIOLOGY *Cryptococcus neoformans/ISOLATION & PURIF
Epithelium/MICROBIOLOGY/PATHOLOGY/PHYSIOLOGY Female Guinea Pigs Human
Hyperplasia Male Olfactory Mucosa/MICROBIOLOGY/PATHOLOGY/*PHYSIOLOGY
JOURNAL ARTICLE
SOURCE: National Library of Medicine. NOTICE: This material may be
protected by Copyright Law (Title 17, U.S.Code).