Test apparatus
First Claim
1. A test apparatus which is configured to perform an identification test or an antimicrobial susceptibility test of bacteria or fungi, the test apparatus comprising:
- a temperature control unit that is configured to control a set temperature of a culture plate having a plurality of wells and retaining a culture liquid which contains the bacteria or the fungi in each well;
a microscopic observation optical system including a light source that outputs light and an objective lens having a magnification that allows observation of whether the bacteria or fungi is divided and through which the light passes after passing through the culture plate;
a transportation mechanism that is configured to transport the culture plate between the temperature control unit and the microscopic observation optical system, anda processor to process an image from the microscopic observation optical system,wherein the microscopic observation optical system is configured to acquire a microscopic observation image of the bacteria or the fungi in the culture liquid included in each of the wells in the culture plate, and the processor is configured to perform image processing of edge detection and binarization on the image, to extract feature values including a number of bacteria or fungi present in the image, areas of the bacteria or fungi present in the image, an average area, a circularity, an aspect ratio, and a perimeter length of bacterium or fungus from the image after image processing, and to perform comparison at least one of a feature value to that of images in a database.
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Accused Products
Abstract
Provided is a test apparatus in which a test for bacterial identification or antimicrobial susceptibility can be promptly determined. A division state of bacteria is monitored by performing microscopic observation of shapes and the number of the bacteria in each of wells in a culture plate for bacterial identification culture or an antimicrobial susceptibility test, and it is determined whether or not the bacteria grow in a stage shifted from an induction phase to a logarithmic phase, with reference to an image obtained through microscopic observation. In addition, determination performed based on turbidity in the related art may be combined with determination performed based on microscopic observation in which change and the like in the shapes of the bacteria are monitored. Accordingly, it is possible to realize a highly accurate test result.
14 Citations
8 Claims
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1. A test apparatus which is configured to perform an identification test or an antimicrobial susceptibility test of bacteria or fungi, the test apparatus comprising:
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a temperature control unit that is configured to control a set temperature of a culture plate having a plurality of wells and retaining a culture liquid which contains the bacteria or the fungi in each well; a microscopic observation optical system including a light source that outputs light and an objective lens having a magnification that allows observation of whether the bacteria or fungi is divided and through which the light passes after passing through the culture plate; a transportation mechanism that is configured to transport the culture plate between the temperature control unit and the microscopic observation optical system, and a processor to process an image from the microscopic observation optical system, wherein the microscopic observation optical system is configured to acquire a microscopic observation image of the bacteria or the fungi in the culture liquid included in each of the wells in the culture plate, and the processor is configured to perform image processing of edge detection and binarization on the image, to extract feature values including a number of bacteria or fungi present in the image, areas of the bacteria or fungi present in the image, an average area, a circularity, an aspect ratio, and a perimeter length of bacterium or fungus from the image after image processing, and to perform comparison at least one of a feature value to that of images in a database. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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Specification