The clinical use of microarrays is particularly interesting for the diagnosis and monitoring of infectious diseases caused by bacteria, viruses, fungi and protozoa. With the help of DNA arrays, the identification and genotyping of infectious pathogens as well as the determination of genetic markers for virulence and resistance can take place. Protein arrays can also be used in the diagnosis of infectious diseases. For example, the arrays detect antibodies to certain pathogens. In addition, infections activate the immune system differently, and these mechanisms can be studied with antibody arrays on a proteome-wide level. For each type of microarray, INTER-ARRAY® is available as a development partner.