What is the OD₄₅₀ value?

• Solus assays result in the production of a yellow coloured result
• The OD value is measure of how much of the yellow colour has been produced.
• The concentration of colour produced is proportional to the amount of pathogen that was present in the sample.
• Results are expressed as Optical Density (OD₄₅₀) measurements using a microplate reader with a 450nm filter.
• Assay acceptance criteria are detailed in the relevant pack inserts.
• The value of the blanking well (usually A1) should always be subtracted.