Abstract: The invention relates to a process for the in vitro diagnosis of allergic, in particular also pseudo-allergic, immunological and environment-related disorders using live biopsy tissue samples. Also disclosed is a mobile incubation device for keeping the tissue samples alive and functioning. The samples can be, for example, skin or mucous membrane particles. The biopsy sample (14) once removed from the patient is placed in a temperature-controlled oxygen-containing incubating medium (16) and an allergen is introduced, triggering an immediate reaction (a so-called type 1 allergy). The secretion of immunoglobulin E (IgE) or a mediator is then determined qualitatively and/or quantitatively. Suitable mediators are histamine, tryptase, ECP, MPO, DAO, TPS, interleukins, prostaglandins or cytokines. The proposed mobile incubation device is provided with a temperature-controllable incubator for sample holders inside a housing. The sample containers can be filled with a nutrient solution.