JP2011509680A - クロストリジウム・ディフィシルを検出及び/又は同定する方法 - Google Patents
クロストリジウム・ディフィシルを検出及び/又は同定する方法 Download PDFInfo
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- JP2011509680A JP2011509680A JP2010543548A JP2010543548A JP2011509680A JP 2011509680 A JP2011509680 A JP 2011509680A JP 2010543548 A JP2010543548 A JP 2010543548A JP 2010543548 A JP2010543548 A JP 2010543548A JP 2011509680 A JP2011509680 A JP 2011509680A
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- JP
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- Prior art keywords
- clostridium difficile
- glucoside
- reaction medium
- indoxyl
- detecting
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Links
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- C12Q1/00—Measuring or testing processes involving enzymes, nucleic acids or microorganisms; Compositions therefor; Processes of preparing such compositions
- C12Q1/02—Measuring or testing processes involving enzymes, nucleic acids or microorganisms; Compositions therefor; Processes of preparing such compositions involving viable microorganisms
- C12Q1/04—Determining presence or kind of microorganism; Use of selective media for testing antibiotics or bacteriocides; Compositions containing a chemical indicator therefor
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Abstract
Description
a)クロストリジウム・ディフィシルを同定することができる少なくとも1つのβ−グルコシダーゼ基質を含む反応培地を提供するステップと、
b)試験される生物試料を培地に播種するステップと、
c)インキュベーションさせるステップと、
d)クロストリジウム・ディフィシルの存在を示すβ−グルコシダーゼ基質の加水分解を検出するステップと
を含むことを特徴とする、クロストリジウム・ディフィシルを検出及び/又は同定する方法に関する。
本発明に基づき、クロストリジウム・ディフィシル株を検出することができるβ−グルコシダーゼ基質は、以下の実施例によって当業者により同定され得る。
培地をペトリ皿に分配する。
すべての基質がクロストリジウム・ディフィシルを顕現することを可能にした。アリザリン−β−グルコシド、マゼンタ−β−グルコシド(5−ブロモ−6−クロロ−3−インドキシル−β−グルコシド)及び、特にCHE−β−グルコシド(3,4−シクロヘキセノエスクレチン−β−グルコシド)がクロストリジウム・ディフィシルに関して良好な感受性を示した。
−300mg/lの濃度でのブルー−β−グルコシド(5−ブロモ−3−インドキシル−β−グルコシド)、
−150mg/lの濃度での8HQ−β−グルコシド(8−ヒドロキシキノリン−β−グルコシド)、
−50mg/lの濃度でのアリザリン−β−グルコシド(1,2−ジヒドロキシアントラキノン−β−グルコシド)、
−300mg/lの濃度でのDHF−β−グルコシド。
各々が48.10g/lのコロンビアベース、2.5g/lのタウロコール酸ナトリウム、200mg/lのアンモニア性クエン酸鉄、100mg/lのCHE−β−グルコシド、更にD−サイクロセリンに基づくクロストリジウム・ディフィシル用の培地に通常用いられるインヒビター系並びに種々の濃度のエスクリン及びグルコースを含む5つの培地(以下の表を参照)。
嫌気性条件下にて37℃で48時間調製された前培養から播種を行う。
増殖では:
・示した値はコロニーの直径に対応する。
・1は弱い強度の明確な呈色の存在に対応する。
・1.5は呈色1と2の中間である呈色の存在に対応する。
・2は中間強度の明確な呈色の存在に対応する。
・2.5は呈色2と3の中間である呈色の存在に対応する。
・3は強い呈色の存在に対応する。
培地2によれば、グルコースの非存在はコロニーのサイズの縮小をもたらし、エスクリンとしては呈色の強度に正の作用を有する。培地3、4及び5では2つの化合物が混合された。培地4及び5では寒天におけるかなり大きい呈色の拡散が注目される。
クロストリジウム・ディフィシルの2つのプロトタイプ培地に対して107株を試験し、その組成は以下の通りである(1リットル当たり):
Georgeら、「Selective and differential medium for isolation of Clostridium difficile」,Journal of Clinical Microbiology Vol.9,p.214−219,1979による2つの培地における選択系
嫌気性条件下にて37℃で48時間調製された前培養から播種を行う。
4.解釈
CHE−β−グルコシド基質は24時間以降、クロストリジウム・ディフィシルに関して良好な感受性を示す。24時間においてクロストリジウム・ディフィシル以外の76株から8つの株のみが培地において増殖するため、培地の選択性それ自体も極めて良好である。クロストリジウム・ディフィシルの呈色強度を高め、培地1において不均一な外観を有する株を均一にすることが可能になる。
第一の培地(A)は実施例1の培地に対応し、これにD−サイクロセリン(250mg/l)及びセフォキシチン(16mg/l)を加えた。第二の培地(B)は実施例5の培地1に対応する。第三(C)及び第四(D)の培地は、その酵素基質を含まず、0.5g/lでのシステインを充填された本出願人のchromIDサルモネラ培地に基づき、その選択系は実施例5の培地1の選択系に置き換えた。培地Cは100mg/lでのCHE−グルコシド、200mg/lでのアンモニア性クエン酸鉄、2.5g/lでのタウロコール酸ナトリウム及び1.25g/lでのグルコースも含む。培地Dは300mg/lでのCHE−グルコシド、500mg/lでのアンモニア性クエン酸鉄、1g/lでのタウロコール酸ナトリウム及び3%ウマ血清も含む。
培地をペトリ皿に分配する。
これらの4つの培地は糞便のような多微生物試料に存在するクロストリジウム・ディフィシル株の容易な検出を可能にした。驚くべきことに、検出は培地C及びDにおいて一層容易であったが、これらは条件的好気性代謝を有する細菌の培地に基づく。しかし、クロストリジウム・ディフィシルコロニーの平均サイズは培地B、C及びD(それぞれ1.6、2.1及び2mm)より培地A(3.8mm)において大きかった。培地C及びDでは、この少ない増殖はより良好な選択性(他の微生物の全体的又は部分的な抑制)及びより良好な特異性によって補われ、クロストリジウム・ディフィシル種に属さない株によって黒色コロニーは生成されない。
Claims (24)
- a)クロストリジウム・ディフィシルを同定することができる少なくとも1つのβ−グルコシダーゼ基質を含む反応培地を提供するステップと、
b)試験される生物試料を培地に播種するステップと、
c)インキュベーションさせるステップと、
d)クロストリジウム・ディフィシルの存在を示すβ−グルコシダーゼ基質の加水分解を検出するステップと
を含むことを特徴とする、クロストリジウム・ディフィシルの検出及び/又は同定方法。 - 前記ステップc)では、嫌気性条件下で前記播種を行う、請求項1に記載のクロストリジウム・ディフィシルの検出及び/又は同定方法。
- 前記β−グルコシダーゼ基質が、アリザリン−β−グルコシド、マゼンタ−β−グルコシド(5−ブロモ−6−クロロ−3−インドキシル−β−グルコシド)及びCHE−β−グルコシド(3,4−シクロヘキセノエスクレチン−β−グルコシド)から選択される、請求項1又は2に記載のクロストリジウム・ディフィシルの検出及び/又は同定方法。
- 前記β−グルコシダーゼ基質の濃度が、25〜1000mg/l、より好ましくは50〜400mg/lである、請求項1から3のいずれか一項に記載のクロストリジウム・ディフィシルの検出及び/又は同定方法。
- 前記反応培地がエスクリンも含む、請求項1から4のいずれか一項に記載のクロストリジウム・ディフィシルの検出及び/又は同定方法。
- 前記エスクリンの濃度が、5〜500mg/l、好ましくは10〜100mg/lである、請求項5に記載のクロストリジウム・ディフィシルの検出及び/又は同定方法。
- 前記反応培地がβ−グルコシダーゼ誘導因子も含む、請求項1から6のいずれか一項に記載のクロストリジウム・ディフィシルの検出及び/又は同定方法。
- 前記反応培地が、クロストリジウム・ディフィシル株の少なくとも1つの増殖活性化因子も含む、請求項1から7のいずれか一項に記載のクロストリジウム・ディフィシルの検出及び/又は同定方法。
- 前記反応培地が、少なくとも1つのクロストリジウム・ディフィシル胞子発芽誘導因子も含む、請求項1から8のいずれか一項に記載のクロストリジウム・ディフィシルの検出及び/又は同定方法。
- 前記反応培地が少なくとも1つの選択剤も含む、請求項1から9のいずれか一項に記載のクロストリジウム・ディフィシルの検出及び/又は同定方法。
- 前記反応培地が、少なくとも1つの第二の酵素基質も含む、請求項1から10のいずれか一項に記載のクロストリジウム・ディフィシルの検出及び/又は同定方法。
- 前記反応培地が少なくとも1つの還元剤も含む、請求項1から11のいずれか一項に記載のクロストリジウム・ディフィシルの検出及び/又は同定方法。
- クロストリジウム・ディフィシルを同定することができるβ−グルコシダーゼ基質を含む、クロストリジウム・ディフィシルの検出及び/又は同定のための反応培地。
- 前記β−グルコシダーゼ基質が、アリザリン−β−グルコシド、マゼンタ−β−グルコシド(5−ブロモ−6−クロロ−3−インドキシル−β−グルコシド)及びCHE−β−グルコシド(3,4−シクロヘキセノエスクレチン−β−グルコシド)から選択されることを特徴とする、請求項13に記載の反応培地。
- 前記β−グルコシダーゼ基質の濃度が、25〜1000mg/l、より好ましくは50〜400mg/lであることを特徴とする、請求項13又は14に記載の反応培地。
- エスクリンも含むことを特徴とする、請求項13から15のいずれか一項に記載の反応培地。
- 前記エスクリンの濃度が5〜500mg/lであることを特徴とする、請求項16に記載の反応培地。
- β−グルコシダーゼ誘導因子も含むことを特徴とする、請求項13から17のいずれか一項に記載の反応培地。
- クロストリジウム・ディフィシル株の1つ又はそれ以上の増殖活性化因子も含むことを特徴とする、請求項13から18のいずれか一項に記載の反応培地。
- 少なくとも1つのクロストリジウム・ディフィシル胞子発芽誘導因子も含むことを特徴とする、請求項13から19のいずれか一項に記載の反応培地。
- 少なくとも1つの選択剤も含むことを特徴とする、請求項13から20のいずれか一項に記載の反応培地。
- 少なくとも1つの第二の酵素基質も含むことを特徴とする、請求項13から21のいずれか一項に記載の反応培地。
- 少なくとも1つの還元剤も含むことを特徴とする、請求項13から22のいずれか一項に記載の反応培地。
- クロストリジウム・ディフィシルの検出及び/又は同定のための請求項7から23のいずれか一項に記載の培地の使用。
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PCT/FR2009/050072 WO2009092982A2 (fr) | 2008-01-21 | 2009-01-20 | Procédé de détection et/ou d'identification de clostridium difficile |
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FR2964116B1 (fr) * | 2010-09-01 | 2017-06-02 | Biomerieux Sa | Utilisation d'un activateur de beta-glucosidase pour la detection et/ou l'identification de c.difficile |
EP2714923A4 (en) * | 2011-05-31 | 2015-07-08 | Univ Texas | METHOD AND COMPOSITIONS FOR DETECTING FUNCTIONAL CLOSTRIDIUM DIFFICILE TOXINS |
CN102286608B (zh) * | 2011-06-08 | 2014-06-25 | 郑州安图生物工程股份有限公司 | 衣原体诊断方法和试剂盒 |
FR3019833A1 (fr) * | 2014-04-11 | 2015-10-16 | Balel S A | Procede de detection et d'identification de clostridium difficile |
CN105838774A (zh) * | 2016-05-31 | 2016-08-10 | 浙江省疾病预防控制中心 | 一种艰难梭菌显色培养基及其应用 |
CN106811403A (zh) * | 2017-01-22 | 2017-06-09 | 贵州勤邦食品安全科学技术有限公司 | 一种快速检测蜡样芽孢杆菌的测试片及其制备方法、检测方法 |
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JP7254698B2 (ja) | 2017-06-09 | 2023-04-10 | 日水製薬株式会社 | リステリア属検出用培地 |
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JP5737947B2 (ja) | 2015-06-17 |
WO2009092982A2 (fr) | 2009-07-30 |
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