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In general, the desinfection of surfaces is done through scrubbing and wiping using substances on the basis of aldehydes, oxidants and tensides. We propose a 4-stage procedure (see Table 1). The concentration of the agent and the duration of application depend on the circumstances, whether one is dealing with a prophylactic measure, a nosocomial infection or an infection which has to be reported. The epidemiologic relevance dictates the extent of desinfection.