Influence of humic substances on the potentially pathogenic flora of fish

[bekateen]

Not sure if this is better placed in tank talk than here, but I'll put it here for now. We can always move it later if appropriate.

Natalia Matvienko & Natalia Svechkova. (2019). Investigation into the influence of humic substances on the potentially pathogenic flora of fish. Biologija, 65(3). DOI: https://doi.org/10.6001/biologija.v65i3.4089

https://www.lmaleidykla.lt/ojs/index.ph ... /view/4089

Abstract
The purpose of this research paper was to study the influence of humic substances on the potentially pathogenic microbial flora extracted from various species of fish. All the substances were obtained by the original technology of the Djala Gold Company, Dnepropetrovsk, Ukraine. Investigations were based at the Department of Ichthyopathology of the Institute of Fisheries of the National Academy of Agrarian Sciences of Ukraine. The results of the investigation showed that such a substance as potassium humate had no significant impact on the growth of pathogenic microorganisms, and in some cases contributed to a more intensive growth of the bacterial flora. At the same time, it does not have a negative impact on the autochthonous heterotrophic flora of the intestine of such fish as a carp (

Cyprinus carpio

) and a channel catfish (

Ictalurus punctatus

). Such substances as the compound of silver humate and methylene blue are characterized by a significant antimicrobial activity; they are promising for further research and application in the complex therapy and in the treatment of bacterial infections of fish.

Keywords: humic substances, pathogenic microbial flora of fish, channel catfish (Ictalurus punctatus), сarp (Cyprinus carpio)

[Bas Pels]

Interesting paper, and with regard to the placement, this is not only taxonomy, but also othe science.

Basically, it goes deeper into the prevention of bacterial growth.

The searched compound, potasium humerate, is the potassium salt of humic acid. This does not have a desired impact on baterial growth - which does surprise me, as humic acid does. Apparently, the antibacterial working of humid acid comes just from the pH effect.

Humic acid, and thus humarate, is a product what comes in the decaying of plant material. In other words, it doe contain still some nutritional value, and that might explain whay potassium humarate could cntribute to bacterial growth.

lastly, it is known silver ions inhibit bacterial growth, hence the known effect of silver humate.

This might help in understanding the paper