An ELISPOT method for in vitro diagnosis and/or in vitro therapy monitoring of infections and/or infectious diseases comprising incubating eukaryotic cells with an antigen, measuring the number of immunocompetent cells which secrete at least two different cytokines as a reaction to the antigen, and in measuring the immunocompetent cells, visualizing the cells with the aid of at least two different dyes and at least two different filter sets, the filter sets comprising narrowband filters.