The present invention provides a method for determining the presence of a microorganism in a sample using an electrochemically active reporter, wherein the method comprises (a) contacting the sample with an electrochemically active reporter, wherein the electrochemically active reporter is a conjugate comprising a sugar moiety and a redox active reporter moiety that are covalently linked such that the covalent bond can be enzymatically cleaved in the presence of the microorganism by an enzyme expressed by the microorganism, wherein the redox active reporter moiety is selected from the group consisting of resorufin and compounds of formula (I) as defined herein, under conditions that allow enzymatic cleavage of the covalent bond between the sugar moiety and the redox active reporter moiety and reduction of the redox active report moiety in the presence of the microorganism; (b) electrochemically determining the released redox active reporter moiety; and (c) determining the presence of the microorganism and, optionally, number of the microorganisms in the sample based on the determined released redox active reporter moiety. Also encompassed are the electrochemically active reporters used in the described methods and their use for determination of the presence of microorganisms in a sample.
本发明提供了一种使用电
化学活性报告物确定样品中是否存在微
生物的方法,其中该方法包括 (a) 将样品与电
化学活性报告物接触,其中电
化学活性报告物是一种共轭物,该共轭物包括共价连接的糖分子和氧化还原活性报告物分子,该共价键可在微
生物存在的情况下由微
生物表达的酶酶解、其中氧化还原活性报告分子选自由本文定义的 Resorufin 和式 (I) 化合物组成的组,在微
生物存在的条件下,允许酶裂解糖分子和氧化还原活性报告分子之间的共价键并还原氧化还原活性报告分子;(b) 电
化学测定释放的氧化还原活性报告分子;以及 (c) 根据测定的释放的氧化还原活性报告分子,确定样品中是否存在微
生物以及微
生物的数量。此外,还包括所述方法中使用的电
化学活性报告子及其在确定样品中是否存在微
生物时的用途。