**5. Conclusions**

Multiresistant strains can be found in our environment, in any habitat and at any time, making chances for contact high and permanent. Further investigation will show if the spread of multiresistant *Acinetobacter* has reached its peak and if susceptible environmental *Acinetobacter* will still outnumber the clinical strains or if we have to further deal with a constant increase of non-susceptible *Acinetobacter* in the future.

**Acknowledgments:** Furthermore, we would like to thank Georg Reischer, Stefan Jakwerth, and Stoimir Kolarevic for their help in sampling.

**Author Contributions:** C.K. and G.E.Z. conceived and designed the experiments; M.L., R.B., and G.E.Z. performed the experiments; G.E.Z. and C.K. analyzed the data; K.A. and A.H.F. collected samples and data; G.E.Z., C.K., and F.M. wrote the paper.

**Conflicts of Interest:** The authors declare no conflict of interest.

**Funding:** The Joint Danube Survey was organized by the International Commission for the Protection of the Danube River (ICPDR). The study was supported by the Austrian Science Fund (FWF), project number P25817-B22.
