There is an overall increase in life expectancy associated to high costs in health care for an ageing population in the industrialised world. Consequently, there is a demand for fast, cheap and easy to use diagnostic tests that are essential in identifying patients, determining prognosis, monitoring treatment and assessing the efficacy of prevention. Here, nanotechnology has a prominent role, with special emphasis on noble metal nanoparticles. The presentation focuses on alternative nanotechnology-based test-kit for detection of single nucleotide polymorphism as the one associated with lactose intolerance. Methodology, advantages and limitations will be discussed. 
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