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Production and characterization of anti-Salmonella polyclonal antibodies as bio-recognition element for developing a microbial monitoring method

미생물학적 모니터링 분석방법 개발을 위한 생물학적 수용체로서 살모넬라에 특이적인 다중클론 항체의 생산 및 특성 검토

  • Park, Mi-Kyung (School of Food Science and Biotechnology / Food and Bio-industry Research Institute, Kyungpook National University)
  • 박미경 (경북대학교 식품공학부/식품생물산업 연구소)
  • Received : 2017.11.14
  • Accepted : 2017.11.25
  • Published : 2017.11.30

Abstract

For the construction of the microbial monitoring method, anti-Salmonella polyclonal antibodies (pAbs) were produced from a rabbit and purified by saturated ammonium sulfate precipitation and protein A affinity column. The reactivity of anti-Salmonella pAbs was compared to that of commercial ones by using an indirect ELISA. The specificity of anti-Salmonella pAbs was investigated using 20 Salmonella serotypes and 20 non-Salmonella strains. A capturing ability of anti-Salmonella pAbs was investigated by exposing antibody-immobilized gold biosensor to different concentration of Salmonella mixture. Anti-Salmonella pAbs were successfully produced and purified with an antibody concentration of 2.0 mg/mL The reactivity of purified anti-Salmonella pAbs was greater than that of commercial one at all tested concentrations. All Salmonella serotypes, except S. Diarizonae, showed excellent binding efficiency with purified anti-Salmonella pAbs. Moreover, the purified anti-Salmonella pAbs showed excellent specificity against all non-Salmonella strains. The anti-Salmonella pAbs immobilized on the gold biosensor demonstrated the successful capturing capability against Salmonella with a dose-response manner. Therefore, the anti-Salmonella pAbs exhibited sufficient reactivity, specificity, as well as capturing capability against Salmonella to be considered as a bio-recognition element.

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