Phenotypic Characterization of Antibiotic Persisters at the Single-Cell Level: From Data Acquisition to Data Analysis.

Persister cells are present at low frequency in isogenic populations. Moreover, they are only distinguishable from the bulk at the recovery time, after the antibiotic treatment. Therefore, time-lapse microscopy is the gold-standard method to investigate this phenomenon. Here, we describe an exhaustive procedure for acquiring single-cell data which is particularly suitable for persister cell analysis but could be applied to any other fields of research involving single-cell time-lapse microscopy. In addition, we discuss the challenges and critical aspects of the procedure with respect to the generation of robust data.