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Journal of Clinical Microbiology, 07 1997, 1696-1700, Vol 35, No. 7
BC Ross, L Marino, F Oppedisano, R Edwards, RM Robins-Browne and PD Johnson
The diagnosis of Mycobacterium ulcerans infection is hampered by the slow
growth of the bacterium in culture, resulting in a delay of several months
before a specific diagnosis can be obtained. In addition, M. ulcerans
cannot be isolated from water even when there is convincing epidemiological
evidence implicating this as the source of infection. The aim of the
present study was to develop a PCR assay to circumvent the problems of
delayed diagnosis and insensitivity of standard bacterial culture for M.
ulcerans. For the PCR, we isolated an M. ulcerans-specific DNA fragment,
1,109 bp long, which is repeated at least 50 times throughout the genome.
Use of this sequence as a target for PCR allowed us to detect as few as 2
molecules of genomic DNA in vitro. The PCR was used to detect M. ulcerans
DNA in fresh tissue and paraffin-embedded sections from all seven patients
with culture- confirmed cases of infection.
Copyright © 1997 by the American Society for Microbiology. All rights reserved.
Development of a PCR assay for rapid diagnosis of Mycobacterium ulcerans infection
Department of Microbiology and Infectious Disease, Royal Children's Hospital, Parkville, Australia. bross@csl.com.au
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