Inverness Medical Professional Diagnostics is a leading provider of immunofluorescence assays, with an extensive IFA and DFA test menu that includes kits for autoimmune diseases, infectious diseases and STDs as well as miscellaneous conjugates and components. Our Impact IFA Test Systems give you a wide assortment of substrates and kit sizes to choose from. Kit components include substrate slides, controls, conjugate, mounting medium, phosphate-buffered saline (PBS) and ZORBA-NS™ serum diluents to reduce the nonspecific fluorescence associated with some serum specimens.