Abstract
Bacterial co-infection is one of the most common complications of SARS CoV-2 infection. Here, we present a protocol for the in vitro study of co-infection between SARS CoV-2 and Staphylococcus aureus. We describe steps for quantifying viral and bacterial replication kinetics in the same sample, with the optional extraction of host RNA and proteins. This protocol is applicable to many viral and bacterial strains and can be performed in different cell types. For complete details on the use and execution of this protocol, please refer to Goncheva et al.1.