JP2013516177A - 微生物検出物品 - Google Patents
微生物検出物品 Download PDFInfo
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- JP2013516177A JP2013516177A JP2012547299A JP2012547299A JP2013516177A JP 2013516177 A JP2013516177 A JP 2013516177A JP 2012547299 A JP2012547299 A JP 2012547299A JP 2012547299 A JP2012547299 A JP 2012547299A JP 2013516177 A JP2013516177 A JP 2013516177A
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- microporous membrane
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Abstract
【選択図】図4
Description
本出願は、米国特許仮出願第61/291,245号(2009年12月30日出願)の利益を請求するものであり、参照によりこの開示内容全体が本明細書に組み込まれている。
本発明の1つの態様は、非常に様々な表面上に存在する生物を検出するのに使用してもよいものである。本発明のデバイス及び方法は、試料中の微生物の有無を検出することが望ましい様々な用途で使用してよい。これらの試料として、食品試料(例えば、原材料、工程内食品材料、最終製品)、表面(例えば、環境表面、食品加工表面、装置)、水(例えば、表面水、プロセス水)、及び飲料(例えば、生乳、殺菌牛乳、ジュース)が挙げられるが、これらには限定されない。試料は、固体、半固体、ゼラチン状、又は液体の材料から、単独又は種々の組み合わせから実質的に構成される。本発明のデバイス、及び本発明の方法は、対象とする1つ以上の微生物の存在を、定性的又は定量的に測定するために使用できる。
本開示は、試料中の微生物の有無を検出するための物品を提供する。図1aは、本開示による検出物品100の一実施形態の分解組立側面図を示す。物品は、水不透過性第1基材112と、第1基材112に接着された任意の第1接着層114と、第1乾燥コーティング116と、を含むベース部材110を備える。
本開示は、液体試料中の微生物の検出方法を提供する。この方法は、微生物含有の疑いがある液体試料、及び本明細書に記載される検出物品の任意の実施形態を準備する工程を含む。物品は、冷水可溶性ゲル化剤を含む第1乾燥コーティングを含むベース部材と、微多孔性膜と、検出試薬を含む第2乾燥コーティングを含むカバーシートと、微多孔性膜とカバーシートとの間に流体バリアを形成する取り外し可能なバリア層と、を備える。微多孔性膜は、ベース部材とバリア層との間に配置される。この方法の更なる工程は図5に示される。
微多孔性膜支持材料の調製
非水溶性接着剤(96重量%イソオクチルアクリレート及び4重量%アクリル酸)の薄層でコーティングした二軸延伸ポリプロピレン(BOPP、1.6ミル(0.04mm)厚)フィルムから、環状ガスケットをダイカットした。このガスケットの外径は約52.5mmであり、ガスケットの内径は約45mmであった。
以下のようにベース部材を調製した。米国特許第4,565,783号に記載されるように、一方の主表面上にシリコーン接着剤を含むプラスチックフィルム(Applied Biosystems(Foster City,CA)のMicroamp Optical Adhesive Film、パーツ番号4311971)を、Meyprogat Guar(M150)及びStandard Methods Nutrients Brothを2:1の割合で混合したもので粉末コーティング(接着剤面側)した。Standard Methods Nutrients Brothの組成は、表1に記載されている。粉末のコーティング重量は、約8グレイン/24平方インチ(20.1mg/cm2)であった。片面上の非水溶性接着剤の薄層及び約5cmの円形開口を有する発泡体スペーサ(ポリスチレンキャップライナー発泡体、0.5mm厚、American Fuji Seal Inc.(Bardstown,KY))を、ベース部材のコーティング側に積層した。
片側に接着剤の薄層を含まないBOPPフィルムで膜支持材料を作製した以外は、実施例1のように検出物品を作製した。
検出物品に黄色ブドウ球菌ATCC 6538(100CFU/mL溶液を1mL)を接種し、37℃で6時間培養した。次に、バリアフィルムを取り外し、37℃で接種後24時間まで培養を継続した。個々の赤色コロニーがベース部材を通して見えた。増殖している赤みがかった領域もカバーシートを通して見えたが、ベース部材を通して見た際と同じ程度には、コロニーははっきりと区別されなかった。液体試料により微多孔性膜の濡れが観察された。デジタルカメラでコロニーの写真を撮った。
実施例2の検出物品に、100コロニー形成単位の黄色ブドウ球菌(ATCC 6538)を接種し、37℃で培養した。それぞれ培養6時間及び8時間後、個々の物品をインキュベーターから取り出し、バリアフィルムを取り外した。バリアフィルムを取り外した後、物品を37℃で接種後24時間まで培養した。赤色コロニーが物品中に観察された。
実施例1の検出物品に、100コロニー形成単位(CFU)の緑膿菌(ATCC 9027)を接種し、37℃でそれぞれ6〜8時間培養した。バリアフィルムを取り外し、37℃で接種後24時間まで培養を継続した。赤色コロニーが物品中に観察された。
実施例2のように検出物品を作製し、シュードモナス・フラギ(ATCC 51821)を約100コロニー形成単位の濃度で接種した(実施例6)。実施例2のように第2の検出物品を作製し、ミクロバクテリウム・エステラロマチカム(ATCC 51822)を約100コロニー形成単位の濃度で接種した(実施例7)。比較のため、3M PETRIFILM Aerobic Countプレート(3M Company(St.Paul,MN)から入手可能)にも、シュードモナス・フラギ及びミクロバクテリウム・エステラロマチカム(それぞれ比較例C−1及びC−2)を各プレートあたり約100コロニー形成単位の濃度で接種した。
Claims (28)
- 試料中の微生物の検出又は計数のための物品であって、
上方主表面及び下方主表面を有する自立型水不透過性基材を含むベース部材であって、前記上方主表面は冷水可溶性ゲル化剤を含む第1乾燥コーティングを含む、ベース部材と、
微多孔性膜と、
検出試薬を含む第2乾燥コーティングを含むカバーシートと、
前記微多孔性膜と前記カバーシートとの間に流体バリアを形成するように構成されたバリア層と、を含み、
前記微多孔性膜が、前記ベース部材と前記バリア層との間に配置される、物品。 - 開口を有するスペーサを更に含み、前記スペーサが前記ベース部材に結合され、前記スペーサ及び前記ベース部材が試料受容穴を形成する、請求項1に記載の物品。
- 前記カバーシートが、前記ベース部材に取り付けられる、請求項1又は2に記載の物品。
- 前記微多孔性膜が、前記ベース部材に取り付けられる、請求項1〜3のいずれか一項に記載の物品。
- 前記バリア層が、前記ベース部材に取り付けられる、請求項1〜4のいずれか一項に記載の物品。
- 前記バリア層が、前記ベース部材に着脱可能に取り付けられる、請求項5に記載の物品。
- 前記微多孔性膜が、ポリエーテルスルホン、ナイロン、ポリカーボネート、ポリエステル、酢酸セルロース、混合セルロースエステル、ポリフッ化ビニリデン、ニトロセルロース、セラミックス、これらの任意のものの誘導体、及びこれらの任意のものの2つ以上の組み合わせからなる群から選択される材料を含む、請求項1〜6のいずれか一項に記載の物品。
- 前記微多孔性膜が、試料封じ込めゾーンを更に備える、請求項1〜7のいずれか一項に記載の物品。
- 栄養培地を更に含む、請求項1〜8のいずれか一項に記載の物品。
- 選択剤を更に含む、請求項1〜9のいずれか一項に記載の物品。
- 複数の検出試薬を更に含む、請求項1〜10のいずれか一項に記載の物品。
- 少なくとも2つの前記複数の検出試薬が、少なくとも2種類の微生物を識別する、請求項11に記載の物品。
- 前記カバーシートが、冷水可溶性ゲル化剤を更に含む、請求項1〜12のいずれか一項に記載の物品。
- 溶菌剤を更に含む、請求項1〜13のいずれか一項に記載の物品。
- 前記検出試薬が、非沈殿性検出試薬を含む、請求項1〜14のいずれか一項に記載の物品。
- 試料中の微生物の有無を検出する方法であって、
微生物含有の疑いがある液体試料と、
検出物品であって、
冷水可溶性ゲル化剤を含む第1乾燥コーティングを含むベース部材と、
微多孔性膜と、
検出試薬を含む第2乾燥コーティングを含むカバーシートと、
前記微多孔性膜と前記カバーシートとの間に流体バリアを形成するバリア層と、を含み、
前記微多孔性膜が、前記ベース部材と前記バリア層との間に配置される、検出物品と、を準備する工程と、
所定の量の前記試料を前記第1乾燥コーティングと接触させる工程と、
前記微多孔性膜を前記試料と接触させる工程と、
前記物品を第1の時間培養する工程と、
前記バリア層を再配置し、前記カバーシートと前記微多孔性膜との間の接触をもたらす工程と、
前記物品を第2の時間培養する工程と、
微生物増殖の有無の兆候を観察する工程と、を含む、方法。 - 前記バリア層を再配置する工程が、前記物品から前記バリア層を取り外す工程を含む、請求項16に記載の方法。
- 前記物品が、前記ベース部材と共に試料受容穴を形成するスペーサを更に含み、所定の量の前記試料を前記第1乾燥コーティングと接触させる工程が、前記試料を前記試料受容穴に移す工程を含む、請求項16又は17に記載の方法。
- 前記試料を、栄養素、選択剤、検出試薬、又はこれらの任意のものの2つ以上の組み合わせと混合する工程を更に含む、請求項16〜18のいずれか一項に記載の方法。
- 前記第1の時間が、約1時間〜約48時間である、請求項16〜19のいずれか一項に記載の方法。
- 前記第1の時間が、約4時間〜約6時間である、請求項20に記載の方法。
- 前記第2の時間が、約15分間〜約96時間以下である、請求項16〜21のいずれか一項に記載の方法。
- 前記第2の時間が、約15分間〜約6時間である、請求項22に記載の方法。
- 前記第2の時間が、約2時間〜約4時間である、請求項22に記載の方法。
- 前記第1乾燥コーティングの少なくとも一部が複数の検出試薬を含み、微生物増殖の兆候を観察する工程が、2種類以上の微生物を検出し、区別する工程を含む、請求項16〜24のいずれか一項に記載の方法。
- 微生物増殖の有無の兆候を観察する工程が、少なくとも1種類の微生物を計数する工程を含む、請求項16〜25のいずれか一項に記載の方法。
- 微生物増殖の有無の兆候を観察する工程が、前記物品の画像を得る工程を含む、請求項16〜26のいずれか一項に記載の方法。
- 微生物増殖の有無の兆候を観察する工程が、前記画像を印刷する、表示する、又は解析する工程を更に含む、請求項27に記載の方法。
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JP2021052766A (ja) * | 2014-08-20 | 2021-04-08 | スリーエム イノベイティブ プロパティズ カンパニー | 硫酸塩還元微生物用の内蔵型嫌気性培養デバイス |
JP2017029038A (ja) * | 2015-07-30 | 2017-02-09 | 株式会社槌屋 | 微生物コロニーの測定方法 |
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JP5755247B2 (ja) | 2015-07-29 |
CN102713616A (zh) | 2012-10-03 |
EP2519821B1 (en) | 2016-11-30 |
US8753834B2 (en) | 2014-06-17 |
US20120288888A1 (en) | 2012-11-15 |
WO2011082305A1 (en) | 2011-07-07 |
BR112012016132A2 (pt) | 2020-09-08 |
EP2519821A1 (en) | 2012-11-07 |
CN102713616B (zh) | 2014-10-15 |
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