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추기백,전계창,Fu Shi Quan 한국곤충학회 2014 Entomological Research Vol.44 No.1
The antibacterial effects of larval extract from Hermetia illucens, commonly known as the black soldier fly, have been demonstrated in vitro. In this study, gas chromatography–mass spectrometry analysis identified the active compound within this larval extract as hexanedioic acid. The antibacterial effects of hexanedioic acid were investigated in mice infected with Klebsiella pneumoniae. After administration of hexanedioic acid, infected mice showed decreased lung bacterial loads and lower rates of body weight loss compared to those in the infection‐only control group. Based on lung bacterial loads, oral hexanedioic acid treatment showed better protection than intraperitoneal treatment. Histopathology confirmed that daily administration of hexanedioic acid for 10 days showed zero toxicity to the kidneys or livers of mice. Therefore, hexanedioic acid may be a novel antibacterial agent.
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최원형,윤지혜,주종필,추기백 한국곤충학회 2012 Entomological Research Vol.42 No.5
Larvae of the black soldier fly, Hermetia illucens are well‐known fly larvae that inhabit many countries around the world. Antimicrobial agents derived from the larvae may be among the substances that are produced in the body for their survival. This study was carried out to identify the antimicrobial effects of H. illucens larvae that commonly inhabit animal waste and food waste. To evaluate the pharmacological effects of H. illucens larvae extracts, the larvae were extracted by various organic solvents, and their antibacterial effects were determined by antimicrobial methods, such as agar disk diffusion and turbidometric assays. The methanol extracts (ME) indicated antibacterial effects against the proliferation of Klebsiella pneumoniae, Neisseria gonorrhoeae and Shigella sonnei. However, antibacterial effects were not induced in Gram‐positive bacteria such as Bacillus subtilis, Streptococcus mutans and Sarcina lutea. The bacterial growth treated with ME was strongly inhibited from 20 mg/mL in a dose‐dependent manner compared with other extracts, and antibacterial activity gradually decreased after 24 h. Moreover, the minimal inhibitory concentration (MIC) values of ME against Klebsiella pneumoniae, Neisseria gonorrhoeae and Shigella sonnei for 12 h were measured as 44.74 mg/mL, 43.98 mg/mL and 43.96 mg/mL, respectively. These results demonstrate that ME of H. illucens larvae not only has antibacterial activity which strongly inhibits the growth and proliferation of the bacteria but also unique properties which effectively block the viability of the bacteria.
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