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首页> 外文期刊>Infrared physics and technology >Detection of pathogenic gram negative bacteria using infrared thermography
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Detection of pathogenic gram negative bacteria using infrared thermography

机译：红外热成像法检测致病性革兰氏阴性细菌

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摘要

Detection of viable bacteria is of prime importance in all fields of microbiology and biotechnology. Conventional methods of enumerating bacteria are often time consuming and labor-intensive. All living organisms generate heat due to metabolic activities and hence, measurement of heat energy is a viable tool for detection and quantification of bacteria. In this article, we employ a non-contact and real time method - infrared thermography (IRT) for measurement of temperature variations in four clinically significant gram negative pathogenic bacteria, viz. Vibrio cholerae, Vibrio mimicus, Proteus mirabilis and Pseudomonas aeruginosa. We observe that, the energy content, defined as the ratio of heat generated by bacterial metabolic activities to the heat lost from the liquid medium to the surrounding, vary linearly with the bacterial concentration in all the four pathogenic bacteria. The amount of energy content observed in different species is attributed to their metabolisms and morphologies that affect the convection velocity and hence heat transport in the medium.
机译：活细菌的检测在微生物学和生物技术的所有领域中至关重要。常规的细菌计数方法通常是耗时且费力的。所有生物都通过代谢活动产生热量，因此，测量热能是检测和定量细菌的可行工具。在本文中，我们采用一种非接触式实时方法-红外热成像（IRT）来测量四种具有临床意义的革兰氏阴性致病菌，即温度变化。霍乱弧菌，模仿弧菌，奇异变形杆菌和铜绿假单胞菌。我们观察到，能量含量定义为细菌代谢活动所产生的热量与液体介质向周围环境散失的热量之比，它与所有四种病原细菌中的细菌浓度呈线性关系。在不同物种中观察到的能量含量归因于它们的新陈代谢和形态，这些代谢和形态影响对流速度并因此影响介质中的热传输。

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