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Journal of Clinical Microbiology, 05 1997, 1097-1100, Vol 35, No. 5
F Portaels, J Agular, K Fissette, PA Fonteyne, H De Beenhouwer, P de Rijk, A Guedenon, R Lemans, C Steunou, C Zinsou, JM Dumonceau and WM Meyers
We compared various diagnostic tests for their abilities to detect
Mycobacterium ulcerans infection in specimens from patients with clinically
active disease. Specimens from 10 patients from the area of Zangnanado
(Department of Zou, Benin) with advanced, ulcerated active M. ulcerans
infections were studied by direct smear, histopathology, culture, PCR, and
oligonucleotide-specific capture plate hybridization (OSCPH). A total of 27
specimens, including 12 swabs of exudate collected before debridement and
15 fragments of tissue obtained during debridement, were submitted to
bacteriologic and histopathologic analysis. The histopathologic evaluation
of tissues from all six patients so tested revealed changes typical of
those caused by M. ulcerans infection. Five specimens were contaminated,
and M. ulcerans was cultivated on Lowenstein-Jensen medium from 12 of the
remaining 22 (54.5%) specimens. Detection of mycobacteria was performed by
PCR, and M. ulcerans was detected by OSCPH with a new probe (5'-
CACGGGATTCATGTCCTGT-3') reacting with M. ulcerans and Mycobacterium
marinum. In 10 of 22 (45.5%) specimens, M. ulcerans was identified by
PCR-OSCPH. There was no statistically significant difference between the
detection of M. ulcerans by culture and by PCR-OSCPH (P > 0.05). This is
the first demonstration of an amplification system (PCR-OSCPH) with a
sensitivity similar to that of culture for the direct and rapid recognition
of M. ulcerans in clinical specimens. This system is capable of identifying
M. ulcerans, even in paucibacillary lesions. Our findings suggest that
PCR-OSCPH should be used in the quest for the elusive environmental
reservoir(s) of M. ulcerans.
Copyright © 1997 by the American Society for Microbiology. All rights reserved.
Direct detection and identification of Mycobacterium ulcerans in clinical specimens by PCR and oligonucleotide-specific capture plate hybridization
Department of Microbiology, Institute of Tropical Medicine, Antwerp, Belgium.
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