Abstract:
:Neonatal toxic shock syndrome-like exanthematous disease (NTED) is a new entity of methicillin-resistant Staphylococcus aureus (MRSA) infection. Most of NTED cases reported previously in the literature were sporadic ones. In the present report, we describe an outbreak of NTED that occurred in a neonatal intensive care unit (NICU) between April, 1999 and April, 2000 in Japan. All MRSA strains isolated from 14 patients (6 NTED, 2 infections and 6 colonizations) in this outbreak belonged to the group of coagulase II and produced toxic shock syndrome toxin 1 (TSST-1). Of these, 14 strains produced staphylococcal enterotoxin C (SEC). No other superantigenic toxins were produced by these strains. The pulsed field gel electrophoresis (PFGE) patterns of genomic DNA digested with SmaI were indistinguishable each other due to no band shifting in all of the 13 strains except for strain O-21 and M56. Strain M56 was different from the dominant type in the positions of only 2 bands, whereas the pattern of strain O-21 had no similarity with the other pattern, suggesting that this outbreak was associated with the spread of a unique MRSA strain in the NICU. Two-dimensional electrophoresis (2-DE) analysis of exoproteins revealed that the patterns of these 14 strains were very indistinguishable to each other, and that these strains produced very large amounts of TSST-1 and SEC3 subtype superantigens, as measured with computer-assisted image analysis of the intensity of 2-DE spots. The 2-DE gel of O-21 showed the different pattern from the others. These results as well as the profiles of toxin production also supported the conclusion drawn from PFGE analysis. Based on these results, the involvement of TSST-1 and SEC3 in the pathogenesis of NTED is discussed.
journal_name
Microbiol Immunoljournal_title
Microbiology and immunologyauthors
Nakano M,Miyazawa H,Kawano Y,Kawagishi M,Torii K,Hasegawa T,Iinuma Y,Ohta Mdoi
10.1111/j.1348-0421.2002.tb02696.xkeywords:
subject
Has Abstractpub_date
2002-01-01 00:00:00pages
277-84issue
4eissn
0385-5600issn
1348-0421journal_volume
46pub_type
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