COVID-19(2) Bacteremia(1) Bloodstream infections(1) confirmed case(1) Acinetobacter(1) COVID-19 pandemic(1) silent(1) Characteristics(1) omicron(1) Greece(1) microorganism(1) Antibiotic resistance(1) Enterococcus faecium(1) organism(1) Epidemiology(1) occurred(1) ICU(1) patients hospitalized(1) Patient(1) Germany(1) in-hospital mortality(1) Frequency(1) Klebsiella pneumoniae(1) profile(1) pandemic(1) MDR(1) hospital(1) bacterial specy(1) pathogen(1) Wastewater-based epidemiology(1)