Research Article

In Vitro and In Vivo Biofilm Characterization of Methicillin-Resistant Staphylococcus aureus from Patients Associated with Pharyngitis Infection

Figure 1

Colony morphologies of reference Staphylococcus aureus strains MRSA ATCC 33591 (positive control) and S. epidermidis ATCC 12228 (negative control) revealing strong black (upper sector) and pink (lower sector) coloured colonies on Congo red agar medium, respectively.