optical sensor for detection and enumeration of microorganisms
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United States of America Patent
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Apr 21, 2015
Grant Date -
Oct 28, 2010
app pub date -
Jan 17, 2008
filing date -
Jan 17, 2008
priority date (Note) -
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Abstract
A new device and method for detecting the presence of living microorganisms in test samples are described. The device includes a container having at least one section transparent to light with an incubation zone defined in the container, the incubation zone containing growth media in which the sample is cultured. A detection zone containing a matrix composed of a polymeric material which is substantially transparent to light, and at least one indicator reagent sensitive to carbon dioxide gas generated by the microorganisms in the incubation zone is located in the transparent section of the matrix. The matrix is configured to facilitate penetration of external light aimed at the transparent section of the container and interaction of the external light with the indicator reagent to yield interactive light that escapes through the transparent section of the container, said interactive light is being indicative of the presence and/or concentration of the microorganisms.
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