Latex piezoelectric immunoassay: it's application for clinical and environmental analysis

Latex piezoelectric immunoassay (LPEIA) is a new immunoassay method that requires no immobilization of antigen or antibody on the electrode surface of quartz crystal, in contrast to previous immunoassays in which a piezoelectric crystal is used as a microbalance and immobilization is essential. The frequency change was observed during the aggregation of antibody- or antigen-coated latex particles. This method was used for the detection and is sufficiently sensitive for clinical applications. We made a prototype LPEIA sensor for remote sensing and diagnosis to care for a handicapped person in their home.