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Diseases of Aquatic Organisms

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DAO 113:207-213 (2015)  -  DOI:

Growth inhibition of Aeromonas salmonicida and Yersinia ruckeri by disinfectants containing peracetic acid

Thomas Meinelt1,*, Thy-My Phan1, Sascha Behrens1, Andreas Wienke1, Lars-Flemming Pedersen2, Dibo Liu1,3, David L. Straus4

1Department of Ecophysiology and Aquaculture, Leibniz Institute of Freshwater Ecology and Inland Fisheries, Müggelseedamm 301, 12587 Berlin, Germany
2Technical University of Denmark, DTU Aqua, Section for Aquaculture, Section for Aquaculture, North Sea Research Centre, PO Box 101, 9850 Hirtshals, Denmark
3Faculty of Agriculture and Horticulture, Humboldt-University-Berlin, Invalidenstraße 42, 10115 Berlin, Germany
4US Department of Agriculture, Agricultural Research Service, Harry K. Dupree—Stuttgart National Aquaculture Research Center, PO Box 1050, Stuttgart, AR 72160, USA
*Corresponding author:

ABSTRACT: Peracetic acid (PAA) is a therapeutic agent used for disinfection in aquaculture, but it must be investigated thoroughly in order to mitigate diseases without harming the fish. Successful disinfectants (like PAA) should not leave dangerous residues in the environment in order to successfully contribute to sustainable aquaculture. The aim of our study was to compare the effectiveness of 6 commercial PAA products with different molecular PAA:H2O2 ratios to reduce bacterial growth of Aeromonas salmonicida and Yersinia ruckeri and to determine effective concentrations and exposure times. All products reduced colony-forming units (CFUs) of A. salmonicida and Y. ruckeri. Products with higher molecular PAA:H2O2 ratios inhibited growth better than products with lower molecular PAA:H2O2 ratios at the same PAA concentration; this indicates that H2O2 is not the driving force in the reduction of A. salmonicida and Y. ruckeri growth by PAA in vitro. The practical application of the products with high molecular PAA:H2O2 ratios should be prioritized if these pathogens are diagnosed.

KEY WORDS: PAA · Peroxide · H2O2 · Furunculosis · Yersiniosis · Fish pathogen · Aquaculture · Bacteria · Water treatment

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Cite this article as: Meinelt T, Phan TM, Behrens S, Wienke A, Pedersen LF, Liu D, Straus DL (2015) Growth inhibition of Aeromonas salmonicida and Yersinia ruckeri by disinfectants containing peracetic acid. Dis Aquat Org 113:207-213.

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