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Journal of Clinical Microbiology, 12 1996, 3151-3159, Vol 34, No. 12
DS Swanson, X Pan and JM Musser
Mycobacterium scrofulaceum is most commonly recovered from children with
cervical lymphadenitis, although it also accounts for approximately 2% of
the mycobacterial infections in AIDS patients. Species assignment of M.
scrofulaceum isolated by conventional techniques can be difficult and
time-consuming. To develop a strategy for rapid species assignment of these
organisms, a 360-bp region of the gene (hsp65) encoding a 65-kDa heat shock
protein in 37 isolates from diverse sources was sequenced. Eight hsp65
alleles were identified, and these sequences formed phylogenetic clusters
and lineages largely distinct from other Mycobacterium species. There was
incomplete correlation between serovar designation and hsp65 allele
assignment. The hsp65 data correlated strongly with the results of sequence
analysis of the gene coding for 16S rRNA. Automated DNA sequencing of a
360-bp region of the hsp65 gene provides a rapid and unambiguous method for
species assignment of these acid-fast organisms for diagnostic purposes.
Copyright © 1996 by the American Society for Microbiology. All rights reserved.
Identification and subspecific differentiation of Mycobacterium scrofulaceum by automated sequencing of a region of the gene (hsp65) encoding a 65-kilodalton heat shock protein
Department of Pediatrics, Baylor College of Medicine, Houston, Texas 77030, USA.
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