Treating monogenean parasites by immersion in ginger extract.

[bekateen]

Levya, G., Zilbergb, D., Paladinia, G., & Fridman, S. 2015. Efficacy of ginger-based treatments against infection with Gyrodactylus turnbulli in the guppy (Poecilia reticulata(Peters)). Veterinary Parasitology, 209, 235-241. http://dx.doi.org/10.1016/j.vetpar.2015.03.002

ABSTRACT:
Monogenean infections of commercially farmed fishes are responsible for significant economic losses and existing chemical therapeutants, often stressful to the fish, pose associated risks. As part of a recent trend to move towards the use of alternative, plant-based remedies for commonly occurring aquaculture-related diseases, the efficiency of ginger (Zingiber officinale) was investigated against the monogenean parasite Gyrodactylus turnbulli in the guppy. In vitro trials revealed the clear anti-parasitic effects of ginger. Ethanolic and aqueous extracts, prepared from freeze dried ginger, were tested. An increase in extract concentration was associated with reduced time to parasite immobilisation, with ethanolic extract being more efficient; at 75 and 200 ppt aqueous ginger extract parasites died at 65.6 ± 2.8 and 1.8 ± 0.2 min, respectively, whereas at 5 and 40 ppt ethanolic extract parasites died at 26.1 ± 0.7 and 4.9 ± 0.3 min, respectively. Bathing G. turnbulli-infected fish in ethanolic ginger extract (i.e. 5 and 7.5 ppt for 90 and 30 min, respectively) significantly reduced infection prevalence and intensity when compared to the water and ethanol controls. The higher concentration (i.e. 7.5 ppt) proved as equally effective as Praziquantel, the conventionally used chemical treatment for gyrodactylosis, with the fish appearing to be completely cleared of the infection in both cases. Oral treatments of G. turnbulli-infected guppies with diets supplemented with 10 and 20% ginger powder proved to be ineffective in decreasing parasite load. These findings demonstrate that immersion in ginger extract offers an effective, alternative treatment against monogenean infection in fish.

[Silurus]

We are going off on a tangent here. Gyrodactylus turnbulli is not even known to infect catfishes, so I fail to see any relevance.

If you have to post a paper on fish parasites (admittedly very low on my priority of papers that should be mentioned here), at least pick one that infects catfishes.

[Jools]

I'll move it to the speak easy...

Jools

[bekateen]

Sorry if misplaced. I posted the paper because inside the paper, the authors refer to treating

Clarias gariepinus

with ginger successfully (even though catfish aren't the subjects on this paper), and because one of the few areas of fishkeeping which still seems to me to be a bit of magic, prayer, and luck is disease treatment. I was thinking that any additional info on treatments for parasites might be useful- that for keepers willing to take a chance when they may be running out of options while dealing with these ectoparasites, this might represent one more therapeutic option in their fish "medicine cabinet," as they say. And the benefit of the paper is that it shows the treatment appears to be somewhat safe and effective (keeping in mind that it has been tested on only a small number of species so far).

No matter, the Speak Easy is fine by me. Thanks for the redirect.

Cheers, Eric