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Title:   Author  item
                                            Straus, David

                                                         - *Dave*item
                                            MEINELT, THOMAS - LEIBINIZ-IFEIF, BERLIN
  Submitted to: Book of Abstracts Aquaculture America
                                    Publication Type: Abstract Only
                                    Publication Acceptance Date: 12/10/2008
                                    Publication  Date: 2/16/2009
                                    Citation: Straus, D.L., Meinelt, T. 2009. Acute toxicity of peracetic acid (PAA) to Ichthyophthirius multifiliis theronts [abstract]. Book of Abstracts Aquaculture America. p.338.Interpretive Summary:
                                Technical Abstract: Peracetic acid (PAA) is an antimicrobial disinfectant used in agriculture, food processing and medical facilities.  It has recently been suggested as a means to control infestations of Ichthyophthirius multifiliis.  The purpose of this study was to determine the acute toxicity of two products containing 4.5% and 40% PAA to I. multifiliis theronts from two geographically separate isolates.  Theronts were exposed to concentrations of PAA in 96-well plates containing groundwater at 23°C.  Acute toxicity was observed over a 4 h period.  No significant difference in the median lethal concentration (LC50) estimates was evident between the two isolates at 4 hrs with the 4.5% PAA product (0.146 versus 0.108 mg/l PAA), while there was a statistical difference between the 4 hr LC50 estimates with the 40% PAA product (0.274 versus 0.158 mg/l PAA).  These results suggest that PAA is toxic to I. multifiliis theronts at low concentrations and that one of the isolates was more resistant to this compound.


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