Korean Journal of Microbiology (미생물학회지)

The Microbiological Society of Korea (한국미생물학회)
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Development of FISH Methods for Detection of Genus Bacillus

Bacillus 속 세균을 검출하기 위한 Fluorescent In Situ Hybridization 방법의 개발

  • Published : 2001.09.01
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Abstract

A technique for detection of Bacillus in soil and waste water treatment system was developed. Mixed col- tured solutions of 22 Bacillus strains were applied for selection of probe and pretreatment method for FISHAmong the three probes known as useful tool for FISH method,S-G-Bacill-0597-a-A-22 was best for detec-tion of Bacillus. Ninety five percent of DAPl count was observed with FISH method with S-G-Bacill-0597-a-A-22 probe. For increasing the permeability to Bacillus cell walls, pretreatment with lysozyme was betterthan that with lysozyme and SDS/DTT (dithiothreitol). Bacillus spore was not detected with FISH. So, Bacil-lus detection in ecosystem requires FISH with pretreatment of lysozyme and spore staining.

Bacillus속에 속하는 세균을 FISH 방법으로 검출하기 위한 새로운 방법을 개발하였다. LGC353b, S-G-Bacill-0597-a-A-22와 S-G-Bacill-0597-a-S-22 등 3개의 probe를 22종의 Bacillus속 세균의 혼합배양액에 적용한 결과 S-G-Bacill-0597-a-A-22의 probe가 DAPI로 검출된 세균 중 95%가 FISH로도 측정되어 가장 효율이 좋은 것으로 나타났다. Hybrillization 과정 전에 Bacillus의 영양세포와 포자의 세포벽을 파괴하기 위하여 SDS/DTT (dithiothreitol)와 lysozyme를 순차적으로 전처리하는 방법과 lysozyme용액으로만 전처리 하는 두 가지 방법을 사용하였다. 그 결과, Bacillus를 검출하기 위해서는 영양세포의 경우에는 lysozyme용액으로만 전처리 하는 방법이 가장 좋았으며, 포자는 FISH로 검출되지 않았다. 따라서 토양, 하수 처리장등의 생태계에서 Bacillus를 검출할 경우에는 영양세포는 lysozyme으로 전처리 하여 FISH로 검출하고 포자는 따로 포자염색으로 검출하는 두가지 방법을 병행하여야한다.

Keywords

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