AST Anti-Bacterial Agents Article Bacteremia Bacterial Typing Techniques Blood Culture Enterobacterales Enterococcus Gram negative bacterium Gram positive bacterium Gram-Negative Bacteria Gram-Positive Bacteria Humans MALDI-TOF Microbial Sensitivity Tests Minimal residual disease Multiple myeloma Next-generation flow cytometry Progression-free survival Prospective Studies SepsiPrep Spectrometry, Mass, Matrix-Assisted Laser Desorption-Ionization Staphylococcus Streptococcus agar amikacin amoxicillin plus clavulanic acid ampicillin antibiotic sensitivity antiinfective agent