Abstract
Providenciagenus is known to harbor certain opportunistic pathogens capable of causinghuman infections. Here, we report two strains of multidrug-resistant bacteria initially identified asProvidencia rettgeriby mass spectrometry, but genome analysis revealed their ANI (79.84-84.20%) and dDDH (21.1-25.6%) values to fall below the accepted species threshold forknown Providencia species. We therefore propose that these isolates be recognized as a novelspecies,Providencia xianensissp. nov. Alarmingly, both strains, isolated from locations far apart, exhibited resistance to last-resort antibiotics, indicating their possible wide distribution, underscoring the urgency for immediate attention and enhanced surveillance for this emerging multidrug-resistant pathogen.
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