- Analyzing specific biomarkers in samples. Vaginal fluids will be analyzed using commercial enzyme-linked immunosorbent assay (ELISA) kits to determine the presence and the concentrations of various proteins. In addition, western blot analysis will be used in order to confirm ELISA assay results. Specific nucleic acid will be determine using common molecular methods such as Reverse transcription polymerase chain reaction (RT-PCR) etc.