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Streptococcus iniae의 형태학적 특성과 병원성

Morphological characteristics and pathogenicity of Streptococcus iniae

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본 연구에서는 S. iniae의 병원성 요인으로 작용할 수 있는 capsule의 존재 여부를 확인하고 그에 따른 capsule과 병원성과의 상관 관계를 조사하였다. 즉, 집락의 형태학적 특성에 따라 viscous form (V+)과 non-viscous form (V-)의 균주로 구분하여 그 특성을 비교 분석하였다. 분리균의 생리학적 및 생화학적 특성으로는 숙주의 방어 기작에 대한 저항성이나 병원성 차이를 구분할 수 없었으나 형태학적으로 큰 차이를 있음을 알 수 있었다. 즉, V+인 경우 cell wall 표면에 capsule이 존재하지만 V-에서는 capsule이 존재하지 않는 것으로 확인되었다. V+는 넙치 혈청에서 증식할 수 있지만 V-는 넙치 혈청에 의해 살균되는 것으로 나타나 capsule의 유무에 따라 넙치의 체액성 면역 요소에 대한 저항력에서 차이가 나는 것을 알 수 있었다. 또한, V+는 넙치 신선 혈청으로 감작한 경우에도 V-에 비해 macrophage의 식균율이 낮았으며 식균된 이후에는 균 수가 지속적으로 감소하는 것을 확인할 수 있었고 일반 어류 주화 세포 내로 침입하여 생존 및 증식할 수 있는 것으로 나타났다. 이들 결과는 앞으로의 백신 개발에 유용한 기초 자료로 사용될 수 있을 것으로 사료되었다.

Abstract

Streptococcus iniae is one of the major bacterial pathogens of cultured olive flounder, Paralichthys olivaceus in Korea. This study was carried out to investigate the interaction between morphological characteristics and immune response such as phagocytosis and serum killing activity. They were differentiated phenotypically into two groups, the viscous colonies and the non-viscous colonies, but the strains in both groups were similar in physiological and biochemical characteristics. Electron microscopic examination of the viscous form revealed thick, electron-dense exopolysaccharide materials surrounding polycationic ferritin-stained cells, while the exopolysaccharide material was absent around the non-viscous form of S. iniae. The viscous type strains were disclosed more virulent than those of non-viscous type for olive flounder. The viscous strains were resistant to normal serum killing activity, while the non-viscous strains were susceptible to bactericidal activity of normal serum from olive flounder. The viscous strains were more resistant to opsonophagocytosis and decreased the chemiluminescence response of head kidney macrophages of olive flounder. All of the tested non-viscous S. iniae strains were efficiently destroyed by the macrophage after phagocytosis. Both the viscous and the non-viscous strains invaded and replicated in cultured fish cell line (CHSE-214). This cellular invasion may contribute to the pathogenesis of invasive S. iniae infection.

참고문헌 (33)

  1. "Comparative pathogenicity study on antigenically variant strains of Enterococcus seriolicida", 19, pp.39~46 (1996)
  2. "Recovery of Streptococcus iniae from diseased fish previously vaccinated with a Sterptococcus vaccine", 67, pp.3756~3758 (2001)
  3. "presence of capsule and resistance to immune serum killing", 53, pp.241~247 (2003)
  4. "Superoxide dismutase and catalse in Photobacterium damselae subsp piscicida and their roles in resistance to reactive oxygen species", 145, pp.483~494 (1999)
  5. "Development of specific nested oilgonucleotide PCR primers for the Streptococcus iniae 16S-23S ribosomal DNA intergenic spacer", 36, pp.2778~2781 (1998)
  6. "a bacterial infection in barramundi", 36, pp.177~181 (1999)
  7. "Streptococcus suis serotype 2 interactions with human brain microvascular endothelial cells", 68, pp.637~643 (2000)
  8. "Use of cationized ferritin as a label of negative charges on cell surfaces", da(n), pp.500~510 (1972)
  9. "Lactococcus garvieae and Streptococcus iniae infection in rainbow trout Oncorhynchus mykiss", 36, pp.227~231 (1999)
  10. "Red drum Sciaenops ocellatus mortalities associated with Streptococcus iniae infection", 36, pp.121~127 (1999)
  11. "Non-O1 Vibrio cholerae NRT36S produces a polysaccharide capsule that determines colony morphology serum resistance and virulence in mice", pp.864~869 (1992)
  12. "Direct fluorescent antibody technique for differentiation between α- and β-hemolytic Sterptococcus spp", 22, pp.77~82 (1987)
  13. "Epizootic caused by β-hemolytic Streptococcus species in cultured freshwater fish", 15, pp.301~307 (1981)
  14. "Invasion of fish epithelial cells by Photobacterium damselae subsp evidence for receptor specificity and effect of capsule and serum", 146, pp.21~30 (2000)
  15. "Biochemical test for identification of medical bacteria" (2000), Lippincott Williams & Wilkins
  16. "Adherence and invasive capacities of the fish pathogen Pasteurella piscicida", 138, pp.29~34 (1996)
  17. "The estimate of the bacterial power of the blood", pp.873~885 (1938)
  18. "Studies on streptococcal infection in pond-cultured fishes Characteristics of a β-hemolytic Streptococcus isolated from cultured ayu and amago in 1977-1978", pp.63~67 (1981)
  19. "The protective immune response of yellowtail Seriola quinqueradiata to the bacterial fish pathogen Lactococcus garvieae", 37, pp.121~126 (1999)
  20. "a beta-hemolytic streptococcus isolated from and Amazon freshwater dolphin", (v), pp.545~553 (1976)
  21. "Pneumococcal trafficking across the blood-brain barrier Molecular analysis of a novel bidirectional pathway", 102, pp.347~360 (1998)
  22. "Respiratory epithelial cell invasion by group B streptococci", pp.5157~5163 (1992)
  23. "Protective immune response in rainbow trout vaccinated with β-hemolytic streptococcal bacterin", pp.169~173 (1989)
  24. "A novel analysis of phagocytosis in fish", pp.243~254 (1981)
  25. "Isolation of salmonids macrophages and analysis of their killing activity Technique in Fish Immunology", pp.137~154 (1990)
  26. "Methods to study bacterial invasion", pp.227~240 (1993)
  27. "Studies on Streptococcus sp as a causative agent of an epizootic among the cultured ayu", pp.119~127
  28. "Vibrio cholerae O1 strain TSI-4 produces the exopolysaccharide materials that determine colony morphology", 64, pp.3648~3655 (1998)
  29. "A cell capsule with possible involvement in resistance to opsonophagocytosis in Enterococcus seriolicida isolated from yellowtail Seriola quinqueradiata", 29, pp.233~235 (1997)
  30. "In vitro adhesion of Pasteurella piscicida to cultured fish cells", 20, pp.77~80 (1997)
  31. "Phenotypic variation associated with an anti-phagocytic factor in the bacterial fish pathogen Enterococcus seriolicida", 25, pp.81~86 (1996)
  32. "Association of the cell capsule with anti-opsonophagocytosis in β-hemolytic Streptococcus spp isolated from rainbow trout", 8, pp.223~228 (1996)
  33. "Possible transmission of Streptococcus iniae from wild fish to cultured marine fish", 64, pp.4065~4067 (1998)

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