Abstract
Ceftolozane/tazobactam is a novel fifth-generation cephalosporin β-lactamase combination with activity against extended-spectrum β-lactamases-producing enterobacteriaceae, and multidrug resistant Pseudomonas aeruginosa. However, clinical experience in real cases caused by these microorganisms is scarce. In this study, we describe three patients with severe infections caused by multidrug resistant and extensively drug-resistant (XDR) P. aeruginosa that were successfully treated with ceftolozane/tazobactam.
Papers of special note have been highlighted as: •• of considerable interest
References
- 1 Influence of multidrug resistance and appropriate empirical therapy on the 30-day mortality rate of Pseudomonas aeruginosa bacteremia. Antimicrob. Agents Chemother. 56(9), 4833–4837 (2012).Crossref, Medline, CAS, Google Scholar
- 2 . Potential strategies for the eradication of multi-drug resistant Gram-negative bacterial infections. Future Microbiol. 11, 955–972 (2016).Link, CAS, Google Scholar
- 3 . Healthcare-associated infections, infection control and the potential of new antibiotics in development in the USA. Future Microbiol. 10(6), 1049–1062 (2015).Link, CAS, Google Scholar
- 4 . Ceftazidime/avibactam and ceftolozane/tazobactam: second-generation β-lactam/β-lactamase inhibitor combinations. Clin. Infect. Dis. 63(2), 234–241 (2016). •• Describes the mechanism of action, pharmacokinetics, pharmacodynamics, antimicrobial activity and clinical experience of ceftolozane/tazobactam (C/T).Crossref, Medline, CAS, Google Scholar
- 5 Evaluation of the in vitro activity of ceftazidime–avibactam and ceftolozane-tazobactam against meropenem-resistant Pseudomonas aeruginosa isolates. Antimicrob. Agents Chemother. 60(5), 3227–3231 (2016). •• One of the first descriptions about testing different strains of Pseudomonas aeruginosa with C/T, comparing them to other agents including ceftazidime/avibactam.Crossref, Medline, CAS, Google Scholar
- 6 . Ceftolozane/tazobactam activity against drug-resistant Enterobacteriaceae and Pseudomonas aeruginosa causing urinary tract and intraabdominal infections in Europe: report from an antimicrobial surveillance programme (2012–15). J. Antimicrob. Chemother. 72(5), 1386–1395 (2017).Crossref, Medline, CAS, Google Scholar
- 7 Multidrug-resistant, extensively drug-resistant and pandrug-resistant bacteria: an international expert proposal for interim standard definitions for acquired resistance. Clin. Microbiol. Infect. 18(3), 268–281 (2011).Crossref, Medline, Google Scholar
- 8 , CENIT Study Group. In vitro activity of ceftolozane/tazobactam against clinical isolates of Pseudomonas aeruginosa and Enterobacteriaceae recovered in Spanish medical centres: results of the CENIT study. Int. J. Antimicrob. Agents 46(5), 502–510 (2015).Crossref, Medline, CAS, Google Scholar
- 9 . Characteristics and outcomes of complicated intra-abdominal infections involving Pseudomonas aeruginosa from a randomized, double-blind, Phase III ceftolozane-tazobactam study. Antimicrob. Agents Chemother. 60(7), 4387–4390 (2016).Crossref, Medline, CAS, Google Scholar
- 10 . Ceftolozane/tazobactam therapy of respiratory infections due to multidrug-resistant Pseudomonas aeruginosa. Clin. Infect. Dis. 61(5), 853–855 (2015).Crossref, Medline, Google Scholar
- 11 Successful treatment of multidrug-resistantPseudomonas aeruginosa breakthrough bacteremia with ceftolozane/tazobactam. Infection 45(1), 115–117 (2016).Crossref, Medline, Google Scholar
- 12 Relationship between ceftolozane–tazobactamexposure and selection for Pseudomonas aeruginosa resistance in a hollow-fiberinfection model. Antimicrob. Agents Chemother. 58(10), 6024–6031 (2014).Crossref, Medline, Google Scholar

