PER extended-spectrum β-lactamases originate from Pararheinheimera spp
Artikel i vetenskaplig tidskrift, 2019

To investigate the origin of PER extended-spectrum β-lactamases, publicly available sequence databases were searched for bla PER-like genes. Three genomes from Pararheinheimera, a genus associated with water and soil environments, were found to carry bla PER-like genes but lacked the ISCR1/ISPa12/ISPa13 insertion sequences commonly associated with bla PER in clinical isolates. Sequence analysis revealed 78–96% nucleotide identity and conserved synteny between the clinical mobile genetic elements (MGEs) encoding bla PER-1 and the bla PER locus in the Pararheinheimera genomes. Notably, bla PER genes were only identified in 3 of 21 Pararheinheimera and Rheinheimera genomes, whereas the genetic environment of bla PER genes as found in clinical MGEs was conserved in all Pararheinheimera and Rheinheimera genomes. These findings indicate that bla PER genes were likely acquired by a branch of the Pararheinheimera genus long before the antibiotic era. Later, bla PER genes were mobilised, likely through the involvement of insertion sequences, from one or several Pararheinheimera species, allowing their dissemination into human pathogens.

Antimicrobial resistance

Extended-spectrum β-lactamase

ESBL

PER-1

Pararheinheimera

Författare

Stefan Ebmeyer

Göteborgs universitet

Erik Kristiansson

Chalmers, Matematiska vetenskaper, Tillämpad matematik och statistik

Göteborgs universitet

D. G. Joakim Larsson

Göteborgs universitet

International Journal of Antimicrobial Agents

0924-8579 (ISSN)

Vol. 53 2 158-164

Ämneskategorier

Mikrobiologi

Medicinsk genetik

Genetik

DOI

10.1016/j.ijantimicag.2018.10.019

PubMed

30395985

Mer information

Senast uppdaterat

2020-04-14