Trends in Rapid Detection Methods for Food-borne pathogenic Microorganisms by Using New Technologies

신기술 이용 식중독균 신속검출법 개발 동향 분석

  • Received : 2010.07.01
  • Accepted : 2010.09.30
  • Published : 2010.12.31

Abstract

Recently, speedy, convenient and easy detection technologies have been developed rapidly and on the contrary, studies on development of traditional detectors applying biochemical characteristics has gradually been decreased. This review examined trend in current studies on detection of food-borne pathogenic microorganisms in the fields of selective media, immuno-assay, Polymerase Chain Reaction (PCR), microarray, terahertz spectroscopy & imagination and so on. Most traditional methods to detect the organisms from food matrix rely on selective media and such a method have disadvantages like long time requirement and distinguishing one species only from each selective medium although they are highly economical. Various new convenient methods such as Enzyme Linked Immuno-sorbent Assay (ELISA), paper-strip kit, fluoroimmunoassay etc. have been developed. The most ideal method for detecting food-borne pathogenic microorganisms in foods should be accurate, convenient, rapid and economical. Additionally, it is needed that capabilities of quantitative analysis and automation to be applied to industries.

식품으로부터 식중독세균을 검출하는 대부분의 전통적인 방법들은 분리하고자 하는 미생물에 적합한 선택배지에 의존할 수밖에 없다. 이러한 선택배지들은 높은 경제성에도 불구하고 오래 걸려 때를 놓치게 되는 소요 시간이 항상 걸림돌로 작용하고 있으며, 하나의 선택배지로 한의 균만을 선택적으로 분리해 내는 등의 단점이 있다. 이러한 단점을 최소화하기 위하여 IMS 등 면역학적 또는 분자생물학적 기법들을 접목시키고 있고, 증균에서 분리와 확인을 동시에 할 수 있는 package 형태의 제품들이 시판되고 있다. 또한 이러한 제품 중 일부는 국제표준기구로부터 인증을 받았고 대부분 chromogenic 기질을 함유한 선택배지들이 포함되어 있을 만큼 신뢰도가 높다고 할 수 있다. 그러나 선택배지 자체만은 이들 단점을 해결할 수 없어 항체를 활용한 신속, 간편하고 환경친화적인 ELISA법, 검출장비가 불필요하여 가장 신속, 간편하게 현장에서 사용하도록 기술을 향상시킨 paper-strip kit나 ELISA 분석 시 직면하는 시료의 matrix effect를 최소화할 수 있다는 장점을 지닌 형광면역분석법(fluoroimmunoassay)등 새로운 기술이 용도에 맞게 다양하게 개발되고 있다. 또한 동시진단 능력이 우수한 현장 진단형 시스템이 개발될 경우, 향후 신 시장 창출, 바이오칩 기술발전, 식중독균을 포함한 위해 미생물의 동시진단 및 역학조사 등에 지대한 기여를 할 것으로 판단된다. 식품에서 식품위해미생물 검출에 있어서 가장 이상적인 방법은 검출 과정이 간단하고 경제적이며 정확하여야 한다는 것이다. 또한 정량적 결과 산출이 가능하여야 하고, 자동화된 방법으로 전환이 가능하여야 산업에 적용될 수 있다는 것인데, 이러한 이상적인 검출방법은 현재까지 존재하지 않는다. 다만, 여러 방법들이 각각의 장점을 갖고 있을 뿐이다. 즉, 현실적 대안은 현재까지 개발된 각각의 방법을 목적과 대상에 따라 시의적절하게 병용 사용하여야 한다는 것이다.

Keywords

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