TY - JOUR
T1 - Epidemiology of carbapenemase-producing Klebsiella pneumoniae in northern Portugal
T2 - Predominance of KPC-2 and OXA-48
AU - Lopes, Elizeth
AU - Saavedra, Maria José
AU - Costa, Eliana
AU - de Lencastre, Hermínia
AU - Poirel, Laurent
AU - Aires-de-Sousa, Marta
PY - 2020/9
Y1 - 2020/9
N2 - Objectives: To provide, for the first time, data on the molecular epidemiology of carbapenemase-producing Klebsiella pneumoniae clinical isolates from the northern region of Portugal (Trás-os-Montes and Alto Douro). Methods: A total of 106 carbapenemase-producing K. pneumoniae isolates recovered from clinical samples and rectal swabs between January 2018 and March 2019 were included in this study. All isolates were characterized by antimicrobial susceptibility, identification of resistance determinants, pulsed-field gel electrophoresis (PFGE), multilocus sequence typing (MLST), and plasmid analysis. Results: The most common carbapenemase identified was KPC-2 (91%), followed by OXA-48 (9%). The blaKPC-2 gene was carried onto IncN (60%) and IncF (40%) plasmid types, whereas the blaOXA-48 gene was mainly located on the IncL (90%) incompatibility group. Molecular characterization distributed the 106 isolates into 29 PFGE types and 21 sequence types (STs), but three clones included 50% of the isolates: PFGE A-ST147-KPC-2 (29%), B-ST15-KPC-2 (15%), and C-ST11-OXA-48 (6%). Antimicrobial resistance rates were the following: ciprofloxacin (76%), trimethoprim–sulfamethoxazole (75%), tobramycin (62%), gentamicin (34%), amikacin (25%), tigecycline (21%), fosfomycin (10%), and colistin (7%). None of the colistin-resistant isolates harboured mcr genes. All isolates remained susceptible to ceftazidime/avibactam, but 10% presented elevated MICs (3 and 4 mg/L). Conclusions: KPC-2 was the predominant carbapenemase among K. pneumoniae isolates currently circulating at this hospital from northern Portugal, followed by OXA-48. These data contrast with those obtained from the rest of the country, where KPC-3 predominates. This study showed a polyclonal structure of KPC-2-producing K. pneumoniae isolates with a predominance of the ST147 and ST15 clones.
AB - Objectives: To provide, for the first time, data on the molecular epidemiology of carbapenemase-producing Klebsiella pneumoniae clinical isolates from the northern region of Portugal (Trás-os-Montes and Alto Douro). Methods: A total of 106 carbapenemase-producing K. pneumoniae isolates recovered from clinical samples and rectal swabs between January 2018 and March 2019 were included in this study. All isolates were characterized by antimicrobial susceptibility, identification of resistance determinants, pulsed-field gel electrophoresis (PFGE), multilocus sequence typing (MLST), and plasmid analysis. Results: The most common carbapenemase identified was KPC-2 (91%), followed by OXA-48 (9%). The blaKPC-2 gene was carried onto IncN (60%) and IncF (40%) plasmid types, whereas the blaOXA-48 gene was mainly located on the IncL (90%) incompatibility group. Molecular characterization distributed the 106 isolates into 29 PFGE types and 21 sequence types (STs), but three clones included 50% of the isolates: PFGE A-ST147-KPC-2 (29%), B-ST15-KPC-2 (15%), and C-ST11-OXA-48 (6%). Antimicrobial resistance rates were the following: ciprofloxacin (76%), trimethoprim–sulfamethoxazole (75%), tobramycin (62%), gentamicin (34%), amikacin (25%), tigecycline (21%), fosfomycin (10%), and colistin (7%). None of the colistin-resistant isolates harboured mcr genes. All isolates remained susceptible to ceftazidime/avibactam, but 10% presented elevated MICs (3 and 4 mg/L). Conclusions: KPC-2 was the predominant carbapenemase among K. pneumoniae isolates currently circulating at this hospital from northern Portugal, followed by OXA-48. These data contrast with those obtained from the rest of the country, where KPC-3 predominates. This study showed a polyclonal structure of KPC-2-producing K. pneumoniae isolates with a predominance of the ST147 and ST15 clones.
KW - Carbapenemase
KW - Klebsiella pneumoniae
KW - KPC-2
KW - OXA-48
KW - Portugal
UR - http://www.scopus.com/inward/record.url?scp=85087302218&partnerID=8YFLogxK
U2 - 10.1016/j.jgar.2020.04.007
DO - 10.1016/j.jgar.2020.04.007
M3 - Article
C2 - 32348902
AN - SCOPUS:85087302218
SN - 2213-7165
VL - 22
SP - 349
EP - 353
JO - Journal of Global Antimicrobial Resistance
JF - Journal of Global Antimicrobial Resistance
ER -