Labor Diagnostika Nord (LDN) is a medium sized company specialized in the development, production and marketing of immunoassays for in-vitro diagnostics, biomedical research and food control. Currently about 200 different products based on ELISA, RIA, Lateral Flow and colorimetric technology are produced at our headquarters in Nordhorn, Germany, according to the German ISO norms and are marketed worldwide via a network of OEM partners and distributors.