OBJECTIVES: To compare the performance of European Committee on Antimicrobial Susceptibility Testing (EUCAST) and CLSI breakpoints following their revision in 2010, for the detection of extended-spectrum β-lactamase (ESBL) production in Enterobacteriaceae. METHODS: 236 well-characterized clinical isolates (including 118 ESBL producers) were investigated by antibiotic disc testing with cefpodoxime, ceftriaxone, cefepime, cefotaxime EUCAST (5 μg/disc), ceftazidime EUCAST (10 μg/disc), cefotaxime CLSI (30 μg/disc) and ceftazidime CLSI (30 μg/disc) with the Kirby-Bauer method. Additionally, synergy phenomena were recorded between amoxicillin/clavulanic acid discs (20/10 μg/disc) and cefepime (30 μg/disc), EUCAST cefotaxime (5 μg/disc), EUCAST ceftazidime (10 μg/disc), CLSI cefotaxime (30 μg/disc) and CLSI ceftazidime [30 μg/disc; disc approximation method (DAM)]. RESULTS: Overall sensitivity of the cefotaxime EUCAST non-susceptible breakpoint equalled sensitivity of the cefotaxime CLSI ESBL screening breakpoint (99.2%). With the ceftazidime EUCAST non-susceptible breakpoint, 27/118 ESBL-producing isolates were not detected, whereas the ceftazidime CLSI ESBL screening breakpoint missed 41/118 ESBL-producing isolates. For cefpodoxime the resistant EUCAST breakpoint showed higher sensitivity for ESBL detection compared with the CLSI ESBL screening breakpoint/disc content (100% versus 98.3%, respectively). Sensitivities of ceftazidime and cefotaxime DAM with CLSI or EUCAST disc contents were comparable (sensitivities ranging from 84.7% to 89.8%). DAM with cefepime displayed the highest overall sensitivity (96.6%). In AmpC-producing isolates, synergy of amoxicillin/clavulanic acid with cefepime showed sensitivity and specificity for ESBL detection of 100% and 97.4%, respectively. CONCLUSIONS: EUCAST non-susceptible breakpoints for ceftazidime and cefpodoxime detect more ESBL-producing Enterobacteriaceae isolates compared with corresponding CLSI ESBL screening breakpoints. Implementation of the cefepime DAM can facilitate ESBL screening, especially in strains producing an AmpC β-lactamase since the test shows high sensitivity and specificity.
OBJECTIVES: To compare the performance of European Committee on Antimicrobial Susceptibility Testing (EUCAST) and CLSI breakpoints following their revision in 2010, for the detection of extended-spectrum β-lactamase (ESBL) production in Enterobacteriaceae. METHODS: 236 well-characterized clinical isolates (including 118 ESBL producers) were investigated by antibiotic disc testing with cefpodoxime, ceftriaxone, cefepime, cefotaxime EUCAST (5 μg/disc), ceftazidime EUCAST (10 μg/disc), cefotaxime CLSI (30 μg/disc) and ceftazidime CLSI (30 μg/disc) with the Kirby-Bauer method. Additionally, synergy phenomena were recorded between amoxicillin/clavulanic acid discs (20/10 μg/disc) and cefepime (30 μg/disc), EUCAST cefotaxime (5 μg/disc), EUCAST ceftazidime (10 μg/disc), CLSIcefotaxime (30 μg/disc) and CLSI ceftazidime [30 μg/disc; disc approximation method (DAM)]. RESULTS: Overall sensitivity of the cefotaxime EUCAST non-susceptible breakpoint equalled sensitivity of the cefotaxime CLSI ESBL screening breakpoint (99.2%). With the ceftazidime EUCAST non-susceptible breakpoint, 27/118 ESBL-producing isolates were not detected, whereas the ceftazidime CLSI ESBL screening breakpoint missed 41/118 ESBL-producing isolates. For cefpodoxime the resistant EUCAST breakpoint showed higher sensitivity for ESBL detection compared with the CLSI ESBL screening breakpoint/disc content (100% versus 98.3%, respectively). Sensitivities of ceftazidime and cefotaxime DAM with CLSI or EUCAST disc contents were comparable (sensitivities ranging from 84.7% to 89.8%). DAM with cefepime displayed the highest overall sensitivity (96.6%). In AmpC-producing isolates, synergy of amoxicillin/clavulanic acid with cefepime showed sensitivity and specificity for ESBL detection of 100% and 97.4%, respectively. CONCLUSIONS: EUCAST non-susceptible breakpoints for ceftazidime and cefpodoxime detect more ESBL-producing Enterobacteriaceae isolates compared with corresponding CLSI ESBL screening breakpoints. Implementation of the cefepime DAM can facilitate ESBL screening, especially in strains producing an AmpC β-lactamase since the test shows high sensitivity and specificity.
Authors: Marco Moretti; Johan Van Laethem; Andrea Minini; Denis Pierard; Manu L N G Malbrain Journal: J Infect Chemother Date: 2021-01-23 Impact factor: 2.211
Authors: Massimo Sartelli; Dieter G Weber; Etienne Ruppé; Matteo Bassetti; Brian J Wright; Luca Ansaloni; Fausto Catena; Federico Coccolini; Fikri M Abu-Zidan; Raul Coimbra; Ernest E Moore; Frederick A Moore; Ronald V Maier; Jan J De Waele; Andrew W Kirkpatrick; Ewen A Griffiths; Christian Eckmann; Adrian J Brink; John E Mazuski; Addison K May; Rob G Sawyer; Dominik Mertz; Philippe Montravers; Anand Kumar; Jason A Roberts; Jean-Louis Vincent; Richard R Watkins; Warren Lowman; Brad Spellberg; Iain J Abbott; Abdulrashid Kayode Adesunkanmi; Sara Al-Dahir; Majdi N Al-Hasan; Ferdinando Agresta; Asma A Althani; Shamshul Ansari; Rashid Ansumana; Goran Augustin; Miklosh Bala; Zsolt J Balogh; Oussama Baraket; Aneel Bhangu; Marcelo A Beltrán; Michael Bernhard; Walter L Biffl; Marja A Boermeester; Stephen M Brecher; Jill R Cherry-Bukowiec; Otmar R Buyne; Miguel A Cainzos; Kelly A Cairns; Adrian Camacho-Ortiz; Sujith J Chandy; Asri Che Jusoh; Alain Chichom-Mefire; Caroline Colijn; Francesco Corcione; Yunfeng Cui; Daniel Curcio; Samir Delibegovic; Zaza Demetrashvili; Belinda De Simone; Sameer Dhingra; José J Diaz; Isidoro Di Carlo; Angel Dillip; Salomone Di Saverio; Michael P Doyle; Gereltuya Dorj; Agron Dogjani; Hervé Dupont; Soumitra R Eachempati; Mushira Abdulaziz Enani; Valery N Egiev; Mutasim M Elmangory; Paula Ferrada; Joseph R Fitchett; Gustavo P Fraga; Nathalie Guessennd; Helen Giamarellou; Wagih Ghnnam; George Gkiokas; Staphanie R Goldberg; Carlos Augusto Gomes; Harumi Gomi; Manuel Guzmán-Blanco; Mainul Haque; Sonja Hansen; Andreas Hecker; Wolfgang R Heizmann; Torsten Herzog; Adrien Montcho Hodonou; Suk-Kyung Hong; Reinhold Kafka-Ritsch; Lewis J Kaplan; Garima Kapoor; Aleksandar Karamarkovic; Martin G Kees; Jakub Kenig; Ronald Kiguba; Peter K Kim; Yoram Kluger; Vladimir Khokha; Kaoru Koike; Kenneth Y Y Kok; Victory Kong; Matthew C Knox; Kenji Inaba; Arda Isik; Katia Iskandar; Rao R Ivatury; Maurizio Labbate; Francesco M Labricciosa; Pierre-François Laterre; Rifat Latifi; Jae Gil Lee; Young Ran Lee; Marc Leone; Ari Leppaniemi; Yousheng Li; Stephen Y Liang; Tonny Loho; Marc Maegele; Sydney Malama; Hany E Marei; Ignacio Martin-Loeches; Sanjay Marwah; Amos Massele; Michael McFarlane; Renato Bessa Melo; Ionut Negoi; David P Nicolau; Carl Erik Nord; Richard Ofori-Asenso; AbdelKarim H Omari; Carlos A Ordonez; Mouaqit Ouadii; Gerson Alves Pereira Júnior; Diego Piazza; Guntars Pupelis; Timothy Miles Rawson; Miran Rems; Sandro Rizoli; Claudio Rocha; Boris Sakakushev; Miguel Sanchez-Garcia; Norio Sato; Helmut A Segovia Lohse; Gabriele Sganga; Boonying Siribumrungwong; Vishal G Shelat; Kjetil Soreide; Rodolfo Soto; Peep Talving; Jonathan V Tilsed; Jean-Francois Timsit; Gabriel Trueba; Ngo Tat Trung; Jan Ulrych; Harry van Goor; Andras Vereczkei; Ravinder S Vohra; Imtiaz Wani; Waldemar Uhl; Yonghong Xiao; Kuo-Ching Yuan; Sanoop K Zachariah; Jean-Ralph Zahar; Tanya L Zakrison; Antonio Corcione; Rita M Melotti; Claudio Viscoli; Perluigi Viale Journal: World J Emerg Surg Date: 2016-07-15 Impact factor: 5.469