The development of DNA probes started from 1950's for diagnostic purposes and it is still
16 growing. DNA probes are applied in several fields such as food, medical, veterinary, environment
17 and security, with the aim of prevention, diagnosis and treatment. The use of DNA probes permits
18 microorganism identification, including pathogen detection, and their quantification when used in
19 specific systems. Various techniques obtained success by the utilization of specific DNA probes, that
20 allowed the obtainment of rapid and specific results. From PCR, qPCR and blotting techniques that
21 were first used in well equipped laboratories to biosensors such as fiber optic, surface plasmon
22 resonance (SPR), electrochemical, and quartz crystal microbalance (QCM) biosensors that use
23 different transduction systems.
