scholarly journals Molecular epidemiology of extensively drug-resistant Klebsiella pneumoniae outbreak in Wenzhou, Southern China

2016 ◽  
Vol 65 (10) ◽  
pp. 1111-1118 ◽  
Author(s):  
Jia Du ◽  
Jianming Cao ◽  
Lizhen Shen ◽  
Wenzi Bi ◽  
Xiaoxiao Zhang ◽  
...  
Keyword(s):  
Klebsiella Pneumoniae ◽  
Molecular Epidemiology ◽  
Southern China ◽  
Drug Resistant ◽  
Extensively Drug Resistant

scholarly journals Genomic insights into multi-drug and extensively drug resistant Klebsiella pneumoniae from India

2020 ◽  
Vol 101 ◽  
pp. 12-13
Author(s):  
C. Shankar ◽  
P. Mathur ◽  
J.J. Jacob ◽  
C. Rodrigues ◽  
K. Walia ◽  
...  
Keyword(s):  
Klebsiella Pneumoniae ◽  
Drug Resistant ◽  
Extensively Drug Resistant

scholarly journals Extensively Drug-Resistant Hypervirulent Klebsiella pneumoniae From a Series of Neonatal Sepsis in a Tertiary Care Hospital, India

2021 ◽  
Vol 8 ◽  
Author(s):  
Tuhina Banerjee ◽  
Jayalaxmi Wangkheimayum ◽  
Swati Sharma ◽  
Ashok Kumar ◽  
Amitabha Bhattacharjee
Keyword(s):  
Klebsiella Pneumoniae ◽  
Neonatal Sepsis ◽  
Tertiary Care Hospital ◽  
Tertiary Care ◽  
Plasmid Profile ◽  
Care Hospital ◽  
Drug Resistant ◽  
Maternal Complications ◽  
Extensively Drug Resistant ◽  
Recent Emergence

The recent emergence of multidrug-resistant (MDR) Klebsiella pneumoniae with hypervirulent traits causing severe infections and considerable mortality is a global cause for concern. The challenges posed by these hypermucoviscous strains of K. pneumoniae with regard to their optimal treatment, management, and control policies are yet to be answered. We studied a series of extensively drug-resistant (XDR) and hypervirulent K. pneumoniae ST5235 isolates with resistance to carbapenems and polymyxins causing neonatal sepsis in a tertiary care hospital in India. A total of 9 K. pneumoniae isolates from 9 cases of neonatal sepsis were studied with respect to their clinical relevance, antimicrobial susceptibility profile, presence of extended spectrum β lactamase (ESBL) production, and responsible genes, carbapenemases (classes A, B, and D), and aminoglycoside-resistant genes. Hypervirulence genes encoding hypermucoid nature, iron uptake, and siderophores were detected by multiplex PCR. The plasmid profile was studied by replicon typing. Isolates were typed by multilocus sequence typing (MLST) and enterobacterial repetitive intergenic consensus (ERIC) PCR to study the sequence types (STs) and clonal relation, respectively. The neonates in the studied cases had history of pre-maturity or low birth weight with maternal complications. All the cases were empirically treated with piperacillin–tazobactam and amikacin followed by imipenem/meropenem and vancomycin and polymyxin B as a last resort. However, all the neonates finally succumbed to the condition (100%). The studied isolates were XDR including resistance to polymyxins harboring multiple ESBL genes and carbapenemase genes (blaNDM and blaOXA−48). Hypervirulence genes were present in various combinations with rmpA/A2 genes present in all the isolates. IncFI plasmids were detected in these isolates. All belonged to ST5235. In ERIC PCR, 6 different clusters were seen. The study highlighted the emergence and burden of XDR hypervirulent isolates of K. pneumoniae causing neonatal sepsis in a tertiary care hospital.

scholarly journals Molecular epidemiology of mcr gene group

2020 ◽  
Vol 22 (4) ◽  
pp. 287-300
Author(s):  
Elizaveta D. Shedko ◽  
O.Yu. Timoshina ◽  
Ilya Sulejmanovich Azyzov
Keyword(s):  
Molecular Epidemiology ◽  
Plasmid Dna ◽  
Bacterial Infections ◽  
Molecular Detection ◽  
Polymyxin B ◽  
Diagnostic Tools ◽  
Drug Resistant ◽  
Gene Group ◽  
Extensively Drug Resistant ◽  
Highly Sensitive

Colistin and polymyxin B are the “last reserve” antimicrobials for the treatment of extensively drug-resistant Gram-negative bacterial infections. The rapidly increasing prevalence of polymyxin resistance mediated by the mcr gene localized on plasmid DNA currently poses a high epidemiological threat. In order to control a distribution of mcr genes, it is necessary to develop highly accurate, highly sensitive and easy-to-use diagnostic tools. This paper provides a review of the most relevant studies on the molecular epidemiology as well as current approaches to microbiological and molecular detection of mcr group genes.

Infrequent isolation of extensively drug-resistant (XDR) Klebsiella pneumoniae resistant to colistin in Spain

2018 ◽  
Vol 51 (3) ◽  
pp. 531-533 ◽  
Author(s):  
Marta Hernández ◽  
Narciso M. Quijada ◽  
Luis López-Urrutia Lorente ◽  
Mónica de Frutos ◽  
David Rodríguez-Lázaro ◽  
...  
Keyword(s):  
Klebsiella Pneumoniae ◽  
Drug Resistant ◽  
Extensively Drug Resistant

Detection of extensively drug-resistant and hypervirulent Klebsiella pneumoniae ST15, ST147, ST377 and ST442 in Iran

2021 ◽  
Author(s):  
Sara Davoudabadi ◽  
Hossein Goudarzi ◽  
Mehdi Goudarzi ◽  
Abdollah Ardebili ◽  
Ebrahim Faghihloo ◽  
...  
Keyword(s):  
Klebsiella Pneumoniae ◽  
Pcr Amplification ◽  
Multidrug Resistant ◽  
Diffusion Method ◽  
Drug Resistant ◽  
Carbapenem Resistant ◽  
Extensively Drug Resistant ◽  
String Test ◽  
Pcr Method ◽  
Extensively Drug Resistance

Abstract In this study, we focused on the emergence of extensively drug-resistant (XDR), pandrug-resistant (PDR), and hypervirulent Klebsiella pneumoniae (hvKP) in Iran. During 2018 to 2020 a total of 52 K. pneumoniae isolates were collected from different clinical specimens. The hvKP isolates were identified by PCR amplification of virulence and capsular serotype-specific genes. Hypermucoviscous K. pneumoniae (hmKP) were identified by string test. Carbapenem-resistant hvKP (CR-hvKP), multidrug-resistant hvKP (MDR-hvKP), extensively drug-resistant hvKP (XDR-hvKP), and pandrug-resistant hvKP (PDR-hvKP) were determined by disc diffusion method, Carba-NP test and PCR method. XDR-hvKP isolates were typed by multilocus sequence typing (MLST). Among all K. pneumoniae isolates 14 (26.9%) were identified as hvKP and 78.6% (11/14) of them were hmKP however, none of the classic K. pneumoniae (cKP) isolates were hmKP. The predominant capsular serotype of hvKP was K2 (42.85%) followed by K1 (35.71%). The prevalence of MDR-hvKP, XDR-hvKP and PDR-hvKP isolates were 6 (42.9%), 5 (35.7%) and 1 (7.1%), respectively. ESBL production was found in 85.7% of hvKP isolates and most of them carried bla TEM gene (78.6%) and 6 isolates (42.9%) were CR-hvKP. Among hvKP isolates, 1 (7.1%), 2 (14.3%), 3 (21.4%), 8 (28.6%), and 11 (78.6%) carried bla NDM-6, bla OXA-48, bla CTX-M, bla SHV, and bla TEM genes, respectively. According to MLST analysis, 2, 1, 1, and 1 XDR-hvKP isolates belonged to ST15, ST377, ST442, and ST147, respectively. The occurrence of such isolates is deeply concerning due to the combination of hypervirulence and extensively drug-resistance or pandrug-resistance.

scholarly journals Antimicrobial Activities of Aztreonam-Avibactam and Comparator Agents against Contemporary (2016) Clinical Enterobacteriaceae Isolates

2017 ◽  
Vol 62 (1) ◽  
Author(s):  
Helio S. Sader ◽  
Rodrigo E. Mendes ◽  
Michael A. Pfaller ◽  
Dee Shortridge ◽  
Robert K. Flamm ◽  
...  
Keyword(s):  
Klebsiella Pneumoniae ◽  
Multidrug Resistant ◽  
Antimicrobial Activities ◽  
Drug Resistant ◽  
Content Type ◽  
Medical Centers ◽  
Extensively Drug Resistant ◽  
Mic Value

ABSTRACT A total of 10,451 contemporary (2016) Enterobacteriaceae isolates from 84 U.S. medical centers and 116 metallo-β-lactamase- and/or OXA-48-like-producing Enterobacteriaceae isolates from other countries were tested against aztreonam-avibactam and comparators. All U.S. isolates were inhibited at aztreonam-avibactam MICs of ≤8 μg/ml (MIC50, ≤0.03 μg/ml; MIC90, 0.12 μg/ml), including Klebsiella pneumoniae carbapenemase-producing isolates (n = 102; MIC50, 0.25 μg/ml; MIC90, 0.5 μg/ml), multidrug-resistant isolates (n = 876; MIC50, 0.06 μg/ml; MIC90, 0.25 μg/ml), and extensively drug-resistant isolates (n = 111; MIC50, 0.12 μg/ml; MIC90, 0.5 μg/ml). The highest aztreonam-avibactam MIC value among ex-U.S. isolates was 4 μg/ml.

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