Impact of Pseudomonas H6 surfactant on all external life cycle stages of the fish parasitic ciliate Ichthyophthirius multifiliis

A. Al-Jubury, Cao lu, P Walter Kania, L. von Gersdorff Jørgensen, Yiying Liu, I. De Bruijn, J.M. Raaijmakers, Kurt Buchman (Co-auteur)

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Samenvatting

A bacterial biosurfactant isolated from Pseudomonas (strain H6) has previously been shown to have a lethal effect on the oomycete Saprolegnia diclina infecting fish eggs. The present work demonstrates that the same biosurfactant has a strong in vitro antiparasitic effect on the fish pathogenic ciliate Ichthyophthirius multifiliis. Three life cycle stages (the infective theront stage, the tomont and the tomocyst containing tomites) were all susceptible to the surfactant. Theronts were the most sensitive showing 100% mortality in as low concentrations as 10 and 13 μg/ml within 30 min. Tomonts were the most resistant but were killed in concentrations of 100 μg/ml. Tomocysts, which generally are considered resistant to chemical and medical treatment, due to the surrounding protective cyst wall, were also sensitive. The surfactant, in concentrations of 10 and 13 μg/ml, penetrated the cyst wall and killed the enclosed tomites within 60 min. Rainbow trout fingerlings exposed to the biosurfactant showed no adverse immediate or late signs following several hours incubation in concentrations effective for killing the parasite. This bacterial surfactant may be further developed for application as an antiparasitic control agent in aquaculture.
Originele taal-2Engels
Pagina's (van-tot)1147-1152
TijdschriftJournal of Fish Diseases
Volume41
Nummer van het tijdschrift7
Vroegere onlinedatum2018
DOI's
StatusGepubliceerd - 2018

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    Al-Jubury, A., lu, C., Walter Kania, P., von Gersdorff Jørgensen, L., Liu, Y., De Bruijn, I., Raaijmakers, J. M., & Buchman, K. (2018). Impact of Pseudomonas H6 surfactant on all external life cycle stages of the fish parasitic ciliate Ichthyophthirius multifiliis. Journal of Fish Diseases, 41(7), 1147-1152. https://doi.org/10.1111/jfd.12810