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Identification of Micro-organisms (Parasites and Bacteria) which are Potential as Pathogenic Agent in Glass Eel of Anguilla spp. at the Eel Capture Location, Sukabumi, West Java Prasetiyo, Dandy E.; Taukhid, Taukhid Taukhid; Andriyanto, Septyan; Azril, Muhammad; Ahyani, Nur; Hermawati, Selia; Amriana, Amriana
Journal of Aquaculture Science Vol 6, No 1IS (2021): Vol 6 Issue Spesial 2021 Journal of Aquaculture Science
Publisher : Airlangga University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31093/joas.v6i1IS.169

Abstract

Eel (Anguilla sp.) is one of the important commercial fish in some countries particularly in East Asian countries such as Japan, South Korea, China, and Taiwan. The need of eel fry or frequently called as glass eel still relies on the natural capture. The issue of natural captured fish is the high level of bacterial infections and diseases. The dependence of glass eel from the nature provides an indication of infections of parasites and bacteria in glass eel. The existence of parasites and bacteria as microorganisms which are potential as pathogenic agents in the cycle of eel culture can be a serious obstacle, so that the glass eel handling needs a particular attention since the capturing proses from the nature. Therefore, identification of parasites and bacteria in the capture location of glass eel was necessarily conducted in Pelabuhan Ratu Bay, Sukabumi, West Java. The glass eel sampling was conducted in May-June 2019, in 3 locations of estuary with the highest capture yield namely Cimandiri River, Cikaso River and Cibuni River. The number of samples taken were 30 eels at each river location with 2 replicates, so that the total eel samples which were taken were 180 eels. Identification of parasites was conducted by examination of ectoparasite and endoparasite and dentification of bacteria was conducted by conventional method (biochemical method). Based on the result of identification, there was no parasite found in the glass eel samples, while bacteria found as many as 12 species and 3 dominant species namely Listeria sp. found in 40 eel samples with prevalence of 22.2%, Aeromonas hydrophila found in 28 eel samples with prevalence of 15.6%, and Staphylococcus spp. found in 22 eel samples with prevalence of 12.2%.
In silico and In vitro Antibacterial Activity of Centella asiatica Leaves Bioactive Compounds Against Aquaculture Pathogenic Bacteria Andriyanto, Septyan; Maftuch, Maftuch; Andayani, Sri; Nafiqoh, Nunak; Gardenia, Lila; Novita, Hessy; Nursid, Muhammad
Jurnal Ilmiah Perikanan dan Kelautan Vol. 17 No. 3 (2025): JURNAL ILMIAH PERIKANAN DAN KELAUTAN
Publisher : Faculty of Fisheries and Marine Universitas Airlangga

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20473/jipk.v17i3.72072

Abstract

Graphical Abstract     Highlight Research The GC-MS analysis of the asiatica leaves extracts identified 53 bioactive compounds. The crude extracts of asiatica showed antibacterial efficacy against fish pathogenic bacteria. 13-Hexyloxacyclotridec-10-en-2-one has the potential to be an inhibitor of DNA gyrase. Bioactive compounds derived from C. asiatica leaves extracts show potential as antibacterial agents.     Abstract Antimicrobial agents are crucial for managing bacterial infections in fish cultures. Centella asiatica is a medicinal plant recognised for its diverse bioactive compounds with important antibacterial properties. The present study aimed to investigate the antibacterial activity of C. asiatica leaves bioactive compounds on fish pathogenic bacteria using an in vitro and in silico approach. The maceration method was used to extract bioactive compounds from C. asiatica leaves and was identified using Gas Chromatography-Mass Spectrometry (GC-MS). In vitro analysis of antibacterial activity was evaluated using the minimum inhibitory concentration method. While in silico molecular docking is applied alongside assessing Lipinski's rules of five, as well as absorption, distribution, metabolism, excretion, and toxicity properties. The result of the GC-MS examination of the C. asiatica leaf extracts identified 53 bioactive compounds. In vitro studies showed antibacterial efficacy of leaf extracts against fish pathogenic bacteria (Streptococcus agalactiae, Bacillus subtilis, and Staphylococcus aureus) with minimum inhibitory concentration values of 12,5 mg/ml. In silico molecular docking analysis showed that several bioactive compounds have the potential to be DNA gyrase inhibitors. Compound 13-Hexyloxacyclotridec-10-en-2-one has the highest inhibition with binding energy of −7,4 Kcal/mol compared to ciprofloxacin as drug standard with a binding energy value −7,3 Kcal/mol. The following compound is gamma.-Muurolene (−6,7 Kcal/mol), Copaene (−6,6 Kcal/mol) and Humulene (−6,6 Kcal/mol). These results suggest that bioactive compounds of C. asiatica leaves extracts hold promise as potential antibacterial agents for treating fish pathogenic bacteria infections.