Evaluating the Effects of Vanillin on Hemolysin Activity in Staphylococcus Epidermidis

Antibiotic resistance is a growing global health crisis linked to quorum sensing and virulence factors. Staphylococcus epidermidis is a major cause of catheter-related bloodstream infections (CRBSI). The virulence factor, hemolysin, contributes to red blood cell lysis and increases infection severity. The purpose of this study was to investigate vanillin’s ability to inhibit hemolysin activity in S. epidermidis and explore vanillin as a potential antivirulence therapy for CRBSIs. The hypothesis of this study was that vanillin would inhibit hemolysin activity in Staphylococcus epidermidis due to its ability to disrupt quorum-sensing signal transduction pathways, which would lead to reduced pathogenic potential in catheter-related bloodstream Infections (CRBSIs), aiding in the production of non-antibacterial treatments. The rationale is that vanillin disrupts quorum-sensing pathways. Vanillin is known to inhibit biofilm formation and virulence factors. A frozen stock of Staphylococcus epidermidis culture was transferred into tryptic soy broth. The cultures were split into three groups; group A & group B were treated with vanillin, all groups were then incubated for 48 hours, and then centrifuged to quantify hemolysin activity. The released supernatant was mixed with the hemoglobin solution, incubated, and the absorbance was measured. Group B of 200 μL produced stronger inhibition, Group C (control) was the baseline, and Group A of 100 μL had the lowest inhibition; the results support a dose-dependent reduction in virulence factor activity, F(2,85) = 5.41, p = 0.006. Vanillin weakens hemolysin activity in S. epidermidis and suggests potential to reduce CRBSI severity, which could provide an alternative antivirulence therapy.