Direct immunofluorescence (DIF) is a valuable tool for diagnosing infectious diseases. DIF involves staining a sample with fluorescently labeled antibodies specific to the infectious agent of interest, allowing for rapid and sensitive detection. Especially FluoS® allows for the detection of infectious agents directly as a Point-of-Care device. Furthermore, our platforms also allow for the detection of contamination in various sample types, such as food, water, and environmental samples or pharmacological products, to identify potential sources of infection and take appropriate measurements.