We start with an effective field theory containing classical vortex solutions and show that the fluctuations of these vortices are described by an effective string theory. Viewed as a model for long distance QCD, this theory provides a concrete picture of the QCD string as a fluctuating Abrikosov-Nielsen-Olesen vortex of a dual superconductor on the border between type I and type II. We present arguments which suggest that the action of the effective string theory is the Nambu-Goto action, i.e. the rigidity vanishes. We then use this theory to calculate the corrections to classical Regge trajectories due to string fluctuations.
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