Evaluation of the capability of the VITEK 2 system to detect extended-spectrum β-lactamase-producing Escherichia coli and Klebsiella pneumoniae isolates, in particular with the coproduction of AmpC enzymes

2009 ◽  
Vol 28 (7) ◽  
pp. 871-874 ◽  
Author(s):  
H. M. Chen ◽  
J. J. Wu ◽  
P. F. Tsai ◽  
J. Y. Wann ◽  
J. J. Yan
Keyword(s):  
Escherichia Coli ◽  
Klebsiella Pneumoniae ◽  
Extended Spectrum ◽  
Vitek 2

scholarly journals The accuracy of extended-spectrum beta-lactamase detection in Escherichia coli and Klebsiella pneumoniae in South African laboratories using the Vitek 2 Gram-negative susceptibility card AST-N255

2019 ◽  
Vol 34 (1) ◽  
Author(s):  
Andrea L. Young ◽  
Mark P. Nicol ◽  
Clinton Moodley ◽  
Colleen M. Bamford
Keyword(s):  
Escherichia Coli ◽  
Klebsiella Pneumoniae ◽  
South African ◽  
Reference Standard ◽  
Gram Negative ◽  
E Coli ◽  
Extended Spectrum ◽  
Vitek 2 ◽  
Negative Susceptibility ◽  
Composite Reference Standard

Background: Phenotypic detection of extended-spectrum beta-lactamases (ESBLs) is based on the inhibition of ESBL enzymes by β-lactamase inhibitors and on the comparison of cephalosporin activity with or without a β-lactamase inhibitor. Many South African diagnostic laboratories rely on the Vitek 2 for automated susceptibility testing and for ESBL detection. However, the Gram-negative susceptibility card currently used locally (AST-N255) has been modified and its accuracy for ESBL detection is not known.Methods: We randomly selected 50 isolates of Klebsiella pneumoniae and Escherichia coli from a collection of clinical bloodstream isolates from Groote Schuur Hospital from 2015 to 2016, including ESBL-producing and non-ESBL-producing strains. We used standardised phenotypic (disc diffusion and broth microdilution) and genotypic (conventional polymerase chain reaction (PCR) for blaCTX-M, blaSHV and blaTEM) methods for detection of ESBLs. We compared ESBL detection by Vitek 2 to a composite reference standard comprising ESBL detection either by both phenotypic methods or by one phenotypic method together with genotypic detection.Results: The sensitivity of Vitek 2 system for detection of ESBLs was 33/36 or 92% (78% – 97%) for E. coli, and 40/40 or 100% (91% – 100%) for K. pneumoniae, whilst specificity was 10/10 or 100% (72% – 100%) and 9/10 or 90% (60% – 98%), respectively. This is comparable with previous studies.Conclusion: Using a composite reference standard of the phenotypic and genotypic methods employed in this study, no Vitek-categorised ESBL E. coli or K. pneumoniae was found to be a non-ESBL with the exception of possible misinterpretation with K. pneumoniae SHV-hyper-producing isolates.

scholarly journals Prevalensi dan Pola Sensitivitas Enterobacteriaceae Penghasil ESBL di RSUD Arifin Achmad Pekanbaru

2018 ◽  
Vol 30 (1) ◽  
pp. 47 ◽  
Author(s):  
Dewi Anggraini ◽  
Uswathun Hasanah Sholihin ◽  
Maya Savira ◽  
Fauzia Andrini Djojosugito ◽  
Dino Irawan ◽  
...  
Keyword(s):  
Escherichia Coli ◽  
Klebsiella Pneumoniae ◽  
Beta Lactamases ◽  
E Coli ◽  
Extended Spectrum ◽  
Extended Spectrum Beta Lactamases ◽  
Vitek 2

Resistensi antibiotik merupakan masalah besar baik di rumah sakit maupun di masyarakat, resistensi menyebabkan pilihan terapi infeksi menjadi terbatas. Prevalensi resistensi antibiotik cenderung makin meningkat, salah satu diantaranya adalah bakteri ESBL (extended spectrum beta lactamases), suatu kelompok bakteri penghasil enzim yang dapat menghidrolisis antibiotik beta laktam yang mengandung grup oxyimino seperti sefalosporin generasi satu sampai ketiga dan aztreonam. Penelitian ini  dilakukan secara deskriptif retrospektif yang bertujuan untuk mengetahui prevalensi ESBL pada Klebsiella pneumoniae dan Escherichia coli, serta pola sensitivitasnya di RSUD Arifin Achmad Pekanbaru. Data diambil dari hasil kultur bakteri dan uji resistensi antibiotik dari berbagai spesimen klinik yang diperiksa di Laboratorium Mikrobiologi RSUD Arifin Achmad selama tahun 2015. Uji ESBL dilakukan dengan alat VITEK 2 compact yang membandingkan antara proporsi penurunan pertumbuhan bakteri terhadap antibiotik sefalosporin saja dengan antibiotik kombinasi sefalosporin ditambah asam klavulanat. Hasil penelitian menunjukkan ESBL-K. pneumoniae sebesar 66,2%, dan ESBL-E. coli 62,2%, dan total rata-rata pada kedua bakteri 65,2%. Prevalensi ESBL-K. pneumoniae dan ESBL-E. coli paling tinggi berasal dari ruangan Instalasi Perawatan Intensif Anak dan berasal dari spesimen sputum dan pus, namun secara statistik tidak didapatkan perbedaan bermakna proporsi ESBL positif dan negatif berdasarkan asal ruangan dan jenis spesimen. Sensitivitas ESBL-K. pneumoniae dan ESBL-E. coli paling baik dengan antibiotik golongan karbapenem, amikasin dan tigesiklin. Penelitian ini menunjukkan tingginya prevalensi K. pneumoniae dan E. coli penghasil ESBL di RSUD Arifin Achmad dibanding beberapa rumah sakit rujukan nasional dii Indonesia. Saran untuk menurunkan angka ESBL dengan cara mencegah transmisi melalui penerapan kewaspadaan kontak dan kewaspadaan berbasis transmisi, aspek pencegahan dan pengendalian infeksi dan peningkatkan rasionalisasi penggunaan antimikroba harus dilakukan.

Extended-spectrum β-lactamases of Escherichia coli and Klebsiella pneumoniae screened by the VITEK 2 system

2011 ◽  
Vol 60 (6) ◽  
pp. 756-760 ◽  
Author(s):  
Maria José Espinar ◽  
Rita Rocha ◽  
Manuela Ribeiro ◽  
Acácio Gonçalves Rodrigues ◽  
Cidália Pina-Vaz
Keyword(s):  
Escherichia Coli ◽  
Klebsiella Pneumoniae ◽  
Extended Spectrum ◽  
Vitek 2

scholarly journals Prevalence and Characterization of Extended-Spectrum β-Lactamase-Producing Antibiotic-Resistant Escherichia coli and Klebsiella pneumoniae in Ready-to-Eat Street Foods

Antibiotics ◽  
2021 ◽  
Vol 10 (7) ◽  
pp. 850
Author(s):  
Shobha Giri ◽  
Vaishnavi Kudva ◽  
Kalidas Shetty ◽  
Veena Shetty
Keyword(s):  
Escherichia Coli ◽  
Food Safety ◽  
Klebsiella Pneumoniae ◽  
Rural Areas ◽  
Significant Risk ◽  
Microbiological Quality ◽  
Resistant Bacteria ◽  
Antibiotic Resistant ◽  
E Coli ◽  
Extended Spectrum

As the global urban populations increase with rapid migration from rural areas, ready-to-eat (RTE) street foods are posing food safety challenges where street foods are prepared with less structured food safety guidelines in small and roadside outlets. The increased presence of extended-spectrum-β-lactamase (ESBL) producing bacteria in street foods is a significant risk for human health because of its epidemiological significance. Escherichia coli and Klebsiella pneumoniae have become important and dangerous foodborne pathogens globally for their relevance to antibiotic resistance. The present study was undertaken to evaluate the potential burden of antibiotic-resistant E. coli and K. pneumoniae contaminating RTE street foods and to assess the microbiological quality of foods in a typical emerging and growing urban suburb of India where RTE street foods are rapidly establishing with public health implications. A total of 100 RTE food samples were collected of which, 22.88% were E. coli and 27.12% K. pneumoniae. The prevalence of ESBL-producing E. coli and K. pneumoniae was 25.42%, isolated mostly from chutneys, salads, paani puri, and chicken. Antimicrobial resistance was observed towards cefepime (72.9%), imipenem (55.9%), cefotaxime (52.5%), and meropenem (16.9%) with 86.44% of the isolates with MAR index above 0.22. Among β-lactamase encoding genes, blaTEM (40.68%) was the most prevalent followed by blaCTX (32.20%) and blaSHV (10.17%). blaNDM gene was detected in 20.34% of the isolates. This study indicated that contaminated RTE street foods present health risks to consumers and there is a high potential of transferring multi-drug-resistant bacteria from foods to humans and from person to person as pathogens or as commensal residents of the human gut leading to challenges for subsequent therapeutic treatments.

scholarly journals Characterization of extended-spectrum β-lactamase-producing Escherichia coli and Klebsiella pneumoniae isolates from the community in Morocco

2011 ◽  
Vol 60 (9) ◽  
pp. 1344-1352 ◽  
Author(s):  
Abouddihaj Barguigua ◽  
Fatima El Otmani ◽  
Mustapha Talmi ◽  
Fatna Bourjilat ◽  
Fatima Haouzane ◽  
...  
Keyword(s):  
Escherichia Coli ◽  
Klebsiella Pneumoniae ◽  
Extended Spectrum
Sign in / Sign up

Export Citation Format

Share Document