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- W4293193631 abstract "Providencia is a genus of Gram-negative and non-spore forming bacteria belonging to the family Morganellaceae, which causes opportunistic infections in humans. Of the 10 Providencia species identified to date, three, P. alcalifaciens, P. rettgeri and P. stuartii, are clinically important. P. alcalifaciens causes diarrhea, including outbreaks arising from food-borne infections, and P. stuartii and P. rettgeri have been found to cause hospital acquired urinary tract infections. Four isolates of P. rettgeri and one isolate of P. stuartii were obtained from urine samples of five patients in Japan in 2018. All five isolates were highly resistant to carbapenems. Three isolates harbored blaIMP-70, encoding a variant of IMP-1 metallo-β-lactamase, with two amino acid substitutions (Val67Phe and Phe87Val), one isolate harbored two copies of blaIMP-1 and one isolate harbored blaIMP-11. Expression of blaIMP-70 conferred carbapenem resistance in Escherichia coli. Recombinant IMP-10, an IMP-1 variant with Val67Phe but without Phe87Val, had significant higher hydrolytic activities against meropenem than recombinant IMP-1, indicating that the Val67Phe amino acid substitution alters activities against meropenem in IMP-70. These results suggest that Providencia species. become more highly resistant to carbapenems by acquisition of two copies of blaIMP-1 or by mutations in blaIMP that result in amino acid substitutions, such as blaIMP-70." @default.
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- W4293193631 date "2022-01-01" @default.
- W4293193631 modified "2023-10-14" @default.
- W4293193631 title "Emergence of Carbapenem-resistant Clinical Isolates of <i>Providencia</i> Species" @default.
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- W4293193631 doi "https://doi.org/10.14789/jmj.jmj21-0057-r" @default.
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