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Journal of Clinical Microbiology, October 1999, p. 3204-3209, Vol. 37, No. 10
Unité de Mycologie, Institut Pasteur,
Paris, France
Received 13 May 1999/Returned for modification 28 June
1999/Accepted 22 July 1999
To date, the time of acquisition of a Cryptococcus
neoformans infectious strain has never been studied. We selected
a primer, (GACA)4, and a probe, CNRE-1, that by randomly
amplified polymorphic DNA (RAPD) analysis and restriction fragment
length polymorphism (RFLP), respectively, regrouped strains from
control samples of C. neoformans var. grubii
environmental isolates according to their geographical origins. The two
typing techniques were then used to analyze 103 isolates from 29 patients diagnosed with cryptococcosis in France. Nine of the 29 patients lived in Africa a median of 110 months prior to moving to
France; 17 of the patients originated from Europe. Results showed a
statistically significant clustering of isolate subtypes from patients
originating from Africa compared to those from Europe. We conclude that
the patients had acquired the C. neoformans infectious
strain long before their clinical diagnoses were made.
0095-1137/99/$04.00+0
Copyright © 1999, American Society for Microbiology. All rights reserved.
Epidemiological Evidence for Dormant Cryptococcus
neoformans Infection
*
Corresponding author. Mailing address: Unité de
Mycologie, Institut Pasteur, 25 Rue du Dr. Roux, 75724 Paris
Cedex 15, France. Phone: (33) 1 45688356. Fax: (33) 1 45688420. E-mail: janbon{at}pasteur.fr.
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