Cai B, et al. – Authors here determined the prevalence of infections due to four Carbapenem–resistant (CR) Gramnegative species (Acinetobacter baumannii, Pseudomonas aeruginosa, Klebsiella pneumoniae and Escherichia coli) in the United States (US) and assessed their impact on hospital stays and mortality. As per observations, the majority of CR infections and disease burden in the US were caused by nonfermenters A. baumannii and P. aeruginosa. Patients with CR infections seemed associated with longer hospital stays and higher crude in–hospital mortality.