Isolation and characterization of the Citrobacter freundii phage EF1 from earthworm (Eisenia andrei)

• 발행기관: 한국예방수의학회
• 저자명: Geun Jung Jung Seok Lee Hong Jae Shin Jung Yeol Bae Ae Rin Lee Sam woong Kim Byung Jin Lee Chi Won N
• 간행물 정보: 『Journal of Preventive Veterinary Medicine』Vol.40, No.4, 133~138쪽, 전체 6쪽
• 주제분류: 의약학 > 기타의약학
• 파일형태: PDF
• 발행일자: 2016.12.30

영문 초록

Earthworms, especially Eisenia andrei, are cultivated for a variety of purposes including waste disposal and compost production. In this study, bacteria from earthworm gut were cultured and the dominant species identified. Subsequently, we isolated bacteriophages able to lyse the isolated gut bacteria. Two dominant genera of gut bacteria, Aeromonas sp. and Citrobacter sp. were identified by using MALDI-TOF MS analysis and a library was constructed to find lytic phages. Phage EF1 showed lytic activity for C. freundii and two Citrobacter isolates, C. braakii and C. murliniae. These 3 species have similar sensitivities to EF1. Several aspects of the life cycle of EF1 were investigated by using C. freundii under optimal growth conditions. EF1 infects C. freundii with a moderate latent period, approximately 25 min, and a large burst size averaging 5 × 10 9 per infected cell. Moreover, the antimicrobial activity of EF1 was well maintained under diverse conditions including a broad temperature range of 40°C to 50°C and a wide pH range of 4 to 11. In conclusion, the results indicate that earthworm casting contain a wide range of bacteria species, for which there are various corresponding bacteriophages

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Earthworm Citrobacter sp Bacteriophages antimicrobial activity