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Abstract

Ichthyophthiriasis, which is caused by Ichthyophthirius multifiliis (Ich) infections, has a severe impact on productivity in freshwater aquaculture. These infections were previously treated effectively with malachite green, a compound that is now banned on fish farms due to its carcinogenicity. To find efficacious drugs to control Ich, flowers of tansy Tanacetum vulgare were evaluated for their antiprotozoal activity. Tanacetum vulgare extract significantly reduced the survival of Ich trophonts and theronts. In vitro, the extract killed all trophonts at 3200 mg l-1, terminated tomont reproduction at 50 mg l-1, and caused mortality of all theronts at 100 mg l-1. T. vulgare extract may be a new and efficacious drug for the control of Ich.
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Bibliography

1. Buchmann K, Sigh J, Nielsen CV, Dalgaard M (2001) Host responses against the fish parasitizing ciliate Ichthyophthirius multifiliis. Vet Parasitol 100: 105-116.
2. Fu YW, Zhang QZ, Xu DH, Xia H, Cai XX, Wang B, Liang J (2014) Parasiticidal effects of Morus alba root bark extracts against Ichthyophthirius multifiliis infecting grass carp. Dis Aquat Organ 108: 129-136.
3. Kumar V, Tyagi D (2013) Chemical composition and biological activities of essential oils of genus Tanacetum − a review. J Pharm Phytochem 2: 155-159.
4. Lahnsteiner F, Weismann T (2007) Treatment of ichthyophthiriasis in rainbow trout and common carp with common and alternative therapeutics. J Aquat Anim Health 19: 186-194.
5. Puk K, Guz L (2014) Effects of medical plant extracts on the growth of the fish parasite Spironucleus vortens. Med Weter 70: 165-168.
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Authors and Affiliations

K. Puk
1
L. Guz
1

  1. Department of Fish Diseases and Biology, Faculty of Veterinary Medicine, University of Life Sciences, Akademicka 12, 20-033 Lublin, Poland

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