JP5162244B2 - エステラーゼ活性を用いたStreptococcusagalactiaeの検出方法 - Google Patents
エステラーゼ活性を用いたStreptococcusagalactiaeの検出方法 Download PDFInfo
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- JP5162244B2 JP5162244B2 JP2007531807A JP2007531807A JP5162244B2 JP 5162244 B2 JP5162244 B2 JP 5162244B2 JP 2007531807 A JP2007531807 A JP 2007531807A JP 2007531807 A JP2007531807 A JP 2007531807A JP 5162244 B2 JP5162244 B2 JP 5162244B2
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Description
CDC(Center for Disease Control)の推奨,MMWR(Morbidity and Mortality Weekly Report), 16 August 2002, Vol. 51, No. RR−11
a) サンプルのすべて又は一部を上記反応培地に播種すること、
b) 播種した培地をインキュベートすること、
c) 少なくとも1つのエステラーゼ活性の存在を、単独で、又は、エステラーゼ活性以外の少なくとも1つの他の酵素活性と共に顕現させること
(本発明の別の主題を構成する)。
1.1 反応培地の調製
反応培地は、心臓−脳抽出物(4.84g/l;Solabia社)、肉汁(1.96g/l;Solabia社)、ビオチン(biothione)(1g/l;Solabia社)、ビオトリプカーゼ(biotrypcase)(7.2g/l;Solabia社)、炭酸ナトリウム(0.3g/l;VWR社)、ピルビン酸ナトリウム(2g/l;Fluka社)、HEPESバッファー(0.4g/l;シグマ社)、ラクトアルブミンペプトン(2g/l;DMV)、グルコース(1g/l;メルク社)、アメリカ寒天(2g/l;Sobigel社)及びヨーロッパ寒天(12g/l;Roko社)を混合することによって調製された。
* 5−ブロモ−4−クロロ−3−インドリルオクタノエート(X−C8;Inalco社)(これが消費されると青緑色になる)、
* 5−ブロモ−6−クロロ−3−インドリルオクタノエート(Magenta−C8;Inalco社)(これが消費されると赤ピンク色になる)。
Streptococcus agalactiae株3つ及び他の細菌株3つ(いずれも本出願人が保存している株に由来)を、生理食塩水中に懸濁して播種し、各培地上に別々にコロニーを形成させる。培養皿を37℃において48時間インキュベートした。18時間、24時間又は40時間以上インキュベートした後に、形成されたコロニーの外観を調べた。このコロニーの着色、増殖及びこの着色の濃さ(エステラーゼ活性を表す)について記録した。
得られた結果を、下記表1中に示し、以下のように示す。
− 増殖(G)について、大きさはmmで示される、
− 色(Co)について、T=青緑色、R=ピンク色又は赤色である、
− 着色の濃さ(I)について、0〜4の任意のスケールに基づいて、0は活性がないことに相当し、4は非常に濃い着色があることに相当する、
− インキュベート時間について、時間(T)である。
エステラーゼ基質X−C8 0.3g/lと同時に、消費されるとピンク色の着色を与える6−クロロ−3−インドリル−α−D−グルコピラノシド(Rose−α−Glu)0.3g/l又は6−クロロ−3−インドリルリン酸塩(Rose−P)0.3g/lを添加する以外は、実施例1中で上述するプロトコルを繰り返した。
X−C8 0.3g/l及びRose−P 0.2g/lを使用し、オートクレーブする前に他の基質と同時にNa2HPO4 0.5g/l及びK2HPO4 0.5g/lと共に5−ブロモ−4−クロロ−3−インドリル−β−D−セロビオシダーゼ(Cellobio)0.08g/lを更に添加する以外は、実施例2中に記載されるプロトコルを繰り返した。
Cellobioの代わりに5−ブロモ−4−クロロ−3−インドリル−β−N−アセチルグルコサミニド(X−NAGlu)0.4g/lを使用する以外は、実施例3中に記載されるプロトコルを繰り返した。
X−NAGluの代わりに5−ブロモ−4−クロロ−3−インドリル−β−D−グルコピラノシド(X−β−Glu)0.08g/l及び5−ブロモ−4−クロロ−3−インドリル−N−メチル−β−D−グルコピラノシド(GreenA−β−Glu)0.3g/lを使用する以外は、実施例4中に記載されるプロトコルを繰り返した。
エステラーゼ基質X−C8 0.3g/lと同時にRose−P 0.3g/lとNa2HPO4 0.5g/l及びK2HPO4 0.5g/lを添加する以外は、実施例1中に記載されるプロトコルを繰り返した。
上記の感度及び特異性を試験するために、実施例1中に記載されるように調製された、X−C8 0.3g/lと、Rose−P 0.2g/l、Cellobio 0.08g/l、Na2HPO4 0.5g/l、K2HPO4 0.5g/l、アズトレオナム0.012g/l及びアンフォテリシンB 0.004g/lを含む本発明による培地を使用した。
この試験には、上記実施例7中で調製された本発明による培地を使用した。
Claims (11)
- Streptococcus agalactiaeを特異的に検出及び識別する方法であって、
少なくとも1つのエステラーゼ酵素基質を含む反応培地を使用する
ことを特徴とする方法。 - 前記反応培地は、Streptococcus agalactiaeに消費される、エステラーゼ基質以外の他の酵素基質を更に含む
ことを特徴とする請求項1に記載の方法。 - 前記の他の酵素基質は、α−グルコシダーゼ基質、ホスファターゼ基質、β−セロビオシダーゼ基質、N−アセチルグルコサミニダーゼ基質及びβ−グルコシダーゼ基質から選択される少なくとも1つの酵素基質である
ことを特徴とする請求項2に記載の方法。 - 前記反応培地は、i)エステラーゼ基質、及び、ii)ホスファターゼ基質又はα−グルコシダーゼ基質を含む
ことを特徴とする請求項3に記載の方法。 - 前記反応培地は、β−セロビオシダーゼ基質、N−アセチルグルコサミニダーゼ基質及びβ−グルコシダーゼ基質から選択される酵素基質を更に含む
ことを特徴とする請求項4に記載の方法。 - 前記酵素基質のそれぞれの濃度は10〜2000mg/lである
ことを特徴とする請求項1〜5のいずれか1項に記載の方法。 - Streptococcus agalactiae種の細菌を含んでいることが多いサンプル中でこの細菌を特異的に検出及び識別する方法であって、
次の工程:
a) サンプルのすべて又は一部を請求項1〜6のいずれか1項に記載の反応培地に播種すること、
b) 播種した培地をインキュベートすること、
c) 少なくとも1つのエステラーゼ活性の存在を、単独で、又は、エステラーゼ活性以外の少なくとも1つの他の酵素活性と共に顕現させること:を含む
ことを特徴とする方法。 - エステラーゼ酵素基質及びβ−セロビオシダーゼ基質を含む
ことを特徴とする請求項1〜6のいずれか1項に記載の方法に用いるための反応培地。 - ホスファターゼ基質をさらに含む
ことを特徴とする請求項8に記載の反応培地。 - インドキシルオクタノエート誘導体、インドキシルノナノエート誘導体、及びインドキシルデカノエート誘導体から選択されるエステラーゼ酵素基質、並びに、
α−グルコシダーゼ基質、ホスファターゼ基質、及びβ−セロビオシダーゼ基質から選択される酵素基質を含む
ことを特徴とする請求項1〜6のいずれか1項に記載の方法に用いるための反応培地。 - リン酸塩溶液を更に含む
ことを特徴とする請求項8〜10のいずれかに記載の反応培地。
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FR0452068A FR2875241B1 (fr) | 2004-09-16 | 2004-09-16 | Procede de detection de streptococcus agalactiae en utilisant l'activite esterase |
FR0452068 | 2004-09-16 | ||
PCT/FR2005/050739 WO2006032809A2 (fr) | 2004-09-16 | 2005-09-14 | Procede de detection de streptococcus agalactiae en utilisant l'activite esterase |
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GB2048302B (en) * | 1979-05-02 | 1984-03-14 | Nat Res Dev | Identification of bacteria |
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US5888760A (en) * | 1997-04-10 | 1999-03-30 | Dade Microscan Inc. | Universal test systems and methods of use thereof for identifying multiple families of microorganisms |
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US9309552B2 (en) | 2016-04-12 |
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