Letter
Author: Kurmann, C. ; Oberle, M. ; Lucke, K. ; Guler, C. ; Cirillo, C. ; von Arb, B. ; Imperiali, M. ; Schilt, C. ; Cherkaoui, A. ; Fankhauser, H. ; Dessauges, M. ; Emonet, S. ; Andrey, D. ; Bruderer, V. ; Brandenberger, M. ; Seiffert, S. ; Comte, L. ; Poirel, Laurent ; Jayol, A. ; Karrer, U. ; Maurer, J. ; Vitale, A. ; Mathis, B. ; Nguyen, A. ; Schoenenberger, M. ; Assman, H. ; Egli, A. ; Hitz, E. ; Scherler, A. ; aerni, M. ; Reichmuth, M. ; Schmid, T. ; Westers, A. ; Ellenberger, S. ; Simonet, T. ; Lienhard, R. ; Gras, P.A. ; Guillod, Y. ; Monnerat, L. Bertaiola ; Gaia, V. ; Jost, G. ; Hyden, D. ; Mancini, S. ; Rosselin, M. ; Fournier, C. ; Schrenzel, J. ; Blanc, D. ; Basilico, L. ; Ergani, A. ; Narr, K. ; Capaul, R. ; Kuegler, M. ; Zowa, C. ; Rumebe, L. ; Liassine, N. ; Mitrovic, I. ; Schnell, B. ; Suter, B. ; Schacher, M. ; Tritten, M. ; Zehnder, C. ; Wampfler, R. ; Keller, P. ; Preiswerk, B. ; Imeri, F. ; Moraz, M. ; Eyer, M. ; Guyon, C. ; Graff, K. ; Hinrikson, H. ; Wehrli, M. ; Nordmann, Patrice ; Wohlwend, N. ; Vonallmen, L. ; Nusbaumer, C. ; Droz, S. ; Boschung, D. ; Minkova, P. ; Graf, S. ; Blaich, A. ; Dubey, N. ; Payen, C. ; Lemaire, B. ; Andreutti, C. ; Descombes, M.C. ; Goldenberger, D. ; Deggi-Messmer, V. ; Vogel, M. ; Staehli, P. ; Vaninetti, G. ; Belo, A.V. ; Schultze, D. ; Castelberg, C. ; Burren, K. ; Delaval, Adam ; Mueller, G.L. ; Pranghofer, S. ; Fatoux, M. ; Pozzi, L. ; Fricker, C. ; Piran, F. ; Blanco, M. Michel ; Maffioli, C. ; Lang, C. ; Casanova, C. ; Elzi, M. ; Povolo, V. ; Di Lorenzo, V. ; Maret, R. ; Balzari, D. ; Trachsel, S. ; Maitrejean, M. ; Martinotti, L. ; Schoch, S. ; Le Terrier, Christophe ; Marti, C.O. ; Gruner, E. ; Renzi, G. ; Schibli, U. ; Togni, G. ; Schmid, S. ; Imhof, A. ; Steffen, I. ; Greub, G. ; Gisler, V. ; Jutzi, M. ; Ivan, B. ; Pianezzi, E. ; Elmer, B. ; Slutter, V. ; Herzog, K. ; Bandeira, D. ; Dubuis, O. ; Mabillard, D. ; Dimitrijevic, D.
The objective of this study was to assess the in vitro efficacy of the com. available combination, sulbactam-durlobactam, against a recent collection of NDM-producing E. coli clin. isolates in comparison with the activities of other therapeutic options proposed in the current guidelines by the European Society of Clin. Microbiol. and Infectious Diseases and the Infectious Diseases Society of America.To gain further insight into the genetic composition of the isolates, addnl. PCRs were performed to detect the potential co-production of CTX-M or CMY enzymes.MICs were determined by broth microdilution in triplicate for aztreonam, aztreonam-avibactam, sulbactam-durlobactam, tigecycline, eravacycline, and cefiderocol. Durlobactam was also evaluated alone because of its strong direct antibacterial activity against Enterobacterales.The concentrations of avibactam and durlobactam, as b-lactamase inhibitors, were fixed at 4 mg/L, in accordance with the CLSI guidelines.MIC values of cefiderocol were evaluated using the UMIC Cefiderocol test.The interpretation was based on the EUCAST susceptible breakpoints for aztreonam, aztreonam-avibactam, cefiderocol, tigecycline, and eravacycline.The 50% and 90% MIC values, MIC50, and MIC90, were also determined for all antibiotics and combinations included in the study.Therefore, our results showed that the combination sulbactamdurlobactam might also be considered as an effective alternative therapeutic option for various infections caused by NDM-producing E. coli isolates, especially when dealing with aztreonam-avibactam and cefiderocol-resistant isolates.Furthermore, evaluation of PK/ PD and clin. outcomes for sulbactam-durlobactam against NDMproducing Enterobacterales is required. However, the information presented here may be of relevance to the medical community.