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Antibacterial activity of ethanolic leaf extracts obtained from various ficus species (Moraceae) against the fish pathogen, Citrobacter freundii

100%

Tkachenko H., Buyun L., Terech-Majewska E., Osadowski Z.

Baltic Coastal Zone. Journal of Ecology and Protection of the Coastline

2016

tom 20

The diversity of culturable bacteria inhabiting the Baltic sea surface waters was more divergent at a polluted location than at clean areas. The most important members of the family Enterobacteriaceae that are pathogenic to fish are the enteric redmouth disease agent, Yersinia ruckeri and two species of Edwardsiella, E. tarda and E. ictaluri, Serratia, Proteus and Citrobacter have all been implicated as potential fish pathogens. The use of pharmaceutical substances is rather limited in fish compared to mammalian therapeutics. Medicinal herbs play an alternative role to antibiotic therapy in aquaculture. Ficus species (Moraceae) leaves possess great medicinal potential for the therapy of bacterial and fungal infections and may be used as a natural antiseptic and antimicrobial agent in veterinary. Accordingly, these products can be used in aquaculture as therapeutic and prophylactic agents against fish pathogens, with antimicrobial properties. Present study aimed to investigate the in vitro antimicrobial activity of the ethanolic leaf extracts of various Ficus species against fish pathogen, Citrobacter freundii. The antimicrobial susceptibility testing was done on Muller-Hinton agar by disc diffusion method (Kirby-Bauer disk diffusion susceptibility test protocol). Our results demonstrate that various species of Ficus had mild antibacterial in vitro activity against C. freundii isolated locally from infected eel (Anguilla anguilla L.). The results proved that the extracts from F. drupacea, F. septica, F. deltoidea as well as F. hispida, F. mucuso, F. pumila, F. craterostoma exhibit a favorable antibacterial activity against C. freundii. These validate scientifically their inhibitory capacity attributed by their common use in folk medicine and contribute towards the development of new treatment options in aquaculture based on natural products. The chemical analysis of the aforementioned plant extracts should be performed to determinate their chemical composition and identify the exact phytocompounds responsible for antimicrobial activity against C. freundii. In addition, they should be subjected to pharmacological evaluations with the aim of assessing their in vivo efficacy, toxicity, potential adverse effects, interactions and contraindications. Given the increasing rate of resistance development in bacterial pathogens in aquaculture environments, medicinal plants with antibacterial properties are very important as natural resources for new active compounds.

Pallasea quadrispinosa G.O.Sars specimens as vectors of aquatic zoosporic fungi parasiting on fish

100%

Czeczuga B., Kiziewicz B., Gruszka P.

Polish Journal of Environmental Studies

2004

tom 13

nr 4

The authors investigated the mycoflora developing on the dead specimens of Pallasea quadrispinosa from Lake Hańcza. Water for experiments was collected from four different bodies of water: Hańcza Lake, Wigry Lake, Supraśl River and Fosa Pond. A total of 41 zoosporic fungus species were found to grow on the dead of Pallasea quadrispinosa specimens, including 17 species inducing mycosis in a number of freshwater specimens, including 17 species inducing mycosis in a number of freshwater fish species: Achlya debaryana, A. diffusa, A. dubia, A. klebsiana, A. orion, A. polyandra, A. prolifera, A. proliferoides, Aphanomyces laevis, Dictyuchus monosporus, Leptolegnia caudata, Saprolegnia delica, S. ferax, S. hypogyna, S monoica, S. parasitica and and Thraustotheca clavata. Aphanomyces astaci as a parasite of noble as a parasite of noble crayfish, causing the so called crayfish plague, was also observed on Pallasea quadrispinosa.

Ograniczanie wyników

1 Baltic Coastal Zone. Journal of Ecology and Protection of the Coastline

1 Polish Journal of Environmental Studies

1 Buyun L.

1 Czeczuga B.

1 Gruszka P.

1 Kiziewicz B.

1 Osadowski Z.

1 Terech-Majewska E.

1 Tkachenko H.

1 2016

1 2004

Wyniki wyszukiwania

Antibacterial activity of ethanolic leaf extracts obtained from various ficus species (Moraceae) against the fish pathogen, Citrobacter freundii

Pallasea quadrispinosa G.O.Sars specimens as vectors of aquatic zoosporic fungi parasiting on fish