Abstract: A mobile computing device includes camera hardware configured to capture image data associated with an output signal area of a biological chromatographic test strip. The mobile computing device further includes processing circuitry in communication with the camera hardware, the processing circuitry being configured to determine, based on the image data captured by the camera hardware, a concentration of a target analyte in a test sample submitted via the biological chromatographic test strip. The mobile computing device further includes an interface in communication with the processing circuitry, the interface being configured to output data indicative of the concentration of the target analyte determined by the processing circuitry.

Abstract: A selective microbial detection device and methods of use are provided. The device includes a water-proof pouch that includes a first wall portion, a second wall portion, and a porous membrane filter disposed in the pouch between the first and second wall portions. The filter membrane divides the pouch into first and second compartments. The microbial detection device also includes an effective amount of a dry nutrient disposed in the first compartment, which contains sodium lauryl sulfate in an amount of 1.75 milligrams or greater per twelve square inches of the first wall portion. A dry, cold water-soluble gelling agent is adhered to the pouch in the first compartment and an absorbent pad is disposed in the second compartment. A sealable sample port provides access to deposit a liquid into the first compartment.

Abstract: A reader device includes a camera board, processing circuitry in communication with the camera board, and an interface in communication with the processing circuitry. The camera board is configured to capture image data associated with an output signal area of a biological chromatographic test strip. The processing circuitry is configured to determine, based on the image data captured by the camera board, a concentration of a target analyte in a test sample submitted via the biological chromatographic test strip.

Abstract: A reader device includes a camera board, processing circuitry in communication with the camera board, and an interface in communication with the processing circuitry. The camera board is configured to capture image data associated with an output signal area of a biological chromatographic test strip. The processing circuitry is configured to determine, based on the image data captured by the camera board, a concentration of a target analyte in a test sample submitted via the biological chromatographic test strip. The interface is configured to output data indicative of the concentration of the target analyte determined by the processing circuitry.

Abstract: An apparatus includes a mobile computing device (902) physically coupled to a lightbox (904). The apparatus includes camera hardware configured to capture image data associated with an output signal area of a biological chromatographic test strip (410) inserted into a receiving slot of the lightbox. The apparatus further includes processing circuitry in communication with the camera hardware, the processing circuitry being configured to determine, based on the image data captured by the camera hardware, a concentration of a target analyte in a test sample submitted via the biological chromatographic test strip. The apparatus further includes an interface in communication with the processing circuitry, the interface being configured to output data indicative of the concentration of the target analyte determined by the processing circuitry.

Abstract: An apparatus comprising a mobile computing device (902) physically coupled to a lightbox (904). The apparatus includes camera hardware, processing circuitry in communication with the camera hardware, and an interface in communication with the processing circuitry. The camera hardware is configured to capture image data associated with an output signal area of a biological chromatographic test strip (410) inserted into a receiving slot of the lightbox. The processing circuitry is configured to determine, based on the image data captured by the camera hardware, a concentration of a target analyte in a test sample submitted via the biological chromatographic test strip. The interface is configured to output data indicative of the concentration of the target analyte determined by the processing circuitry.

Abstract: A device includes camera hardware configured to capture image data associated with an output signal area of a biological chromatographic test strip, and processing circuitry configured to determine, based on the image data, respective intensities of a control line displayed in the output signal area of the biological chromatographic test strip, a hook line displayed in the output signal area of the biological chromatographic test strip, and a test line displayed in the output signal area of the biological chromatographic test strip. The processing circuitry is configured to determine a relative intensity between the test line and at least one of the hook line or control line using the respective intensities, and to detect, based on the relative intensity, a presence of a target analyte in a test sample submitted via the biological chromatographic test strip.

Abstract: A selective microbial detection device and methods of use are provided. The device includes a water-proof pouch that includes a first wall portion, a second wall portion, and a porous membrane filter disposed in the pouch between the first and second wall portions. The filter membrane divides the pouch into first and second compartments. The microbial detection device also includes an effective amount of a dry nutrient disposed in the first compartment, which contains sodium lauryl sulfate in an amount of 1.75 milligrams or greater per twelve square inches of the first wall portion. A dry, cold water-soluble gelling agent is adhered to the pouch in the first compartment and an absorbent pad is disposed in the second compartment. A sealable sample port provides access to deposit a liquid into the first compartment.

Abstract: A method of enumerating gas-producing coliform bacteria present in a cultured dairy product is provided. The method can comprise forming a mixture that comprises a predefined quantity of the dairy product and a predefined volume of a diluent; inoculating a thin film culture device with the mixture to form a hydrogel comprising a nutrient medium for growing coliform bacteria, an effective concentration of lactose, and an effective concentration of MOPS; incubating the inoculated thin film culture device under conditions that facilitate growth of a coliform bacterium; and identifying and counting a gas-producing colony present in the inoculated culture device.

Abstract: A method of detecting a Shigella or Cronobacter microorganism. The method comprises providing a culture device with a selective culture medium and a detection article comprising a first indicator system.

Abstract: An article for detecting Salmonella microorganisms is provided. The article comprises a highly selective nutrient medium and a plurality of indicator systems. A method of using the article to detect Salmonella microorganisms is also provided.

Abstract: A method of detecting a Salmonella microorganism is provided. The method includes the use of a selective growth medium, a first indicator system that is converted to a first detectable product by a Salmonella microorganism, and a second indicator system that is converted to a second detectable product by ?-galactosidase enzyme activity. The method further comprises inoculating the growth medium and incubating the inoculated growth medium at a temperature higher than 40 degrees C.

Abstract: A latent effervescent body comprising a selective agent is disclosed. A method of using the latent effervescent body in a method to selectively enrich a target microorganism is also disclosed. The method comprises providing a sample, a culture medium, and the latent effervescent body. The method further comprises contacting the sample, the culture medium, and the latent effervescent body under conditions to facilitate growth of the target microorganism. The method further comprises releasing the selective agent from the latent effervescent body. Optionally, the method includes detecting a microorganism.

Abstract: The disclosure provides articles and methods useful for detecting a discrete source of DNase activity. DNase-producing microorganisms can be detected. The device can further include selective agents and/or indicators to differentiate groups or species microorganisms. Methods of use include detecting or enumerating DNase-producing microorganisms.

Abstract: A method of enumerating gas-producing coliform bacteria present in a cultured dairy product is provided. The method can comprise forming a mixture that comprises a predefined quantity of the dairy product and a predefined volume of a diluent; inoculating a thin film culture device with the mixture to form a hydrogel comprising a nutrient medium for growing coliform bacteria, an effective concentration of lactose, and an effective concentration of MOPS; incubating the inoculated thin film culture device under conditions that facilitate growth of a coliform bacterium; and identifying and counting a gas-producing colony present in the inoculated culture device.

Abstract: A method of filtering a liquid sample that includes passing a sample comprising at least one biological organism through a filter membrane at a passive water volume flux of at least 10 L/m2·h·psi, wherein the filter membrane comprises a Bubble Point pore size of no more than 1.0 ?m, thereby retaining at least one biological organism on the surface of the membrane; and detecting the at least one biological organism retained on the surface of the filter membrane.

Abstract: A method of detecting Listeria monocytogenes. The method comprises providing a culture device with a selective culture medium and a detection article comprising a first indicator system. The selective culture medium facilitates the growth of Listeria microorganisms. When a Listeria microorganism is detected in a sample contacted with the culture medium, the detection article is contacted with the culture medium to detect Listeria monocytogenes.

Abstract: A method of detecting Listeria monocytogenes. The method comprises providing a culture device with a selective culture medium and a detection article comprising a first indicator system. The selective culture medium facilitates the growth of Listeria microorganisms. When a Listeria microorganism is detected in a sample contacted with the culture medium, the detection article is contacted with the culture medium to detect Listeria monocytogenes.

Abstract: A composition is provided for detecting a Salmonella microorganism in sample. The composition comprises at least one first selective agent that inhibits the growth of Gram-positive microorganisms, a first differential indicator system comprising at least one first differential indicator compound that is converted to a first detectable product by a Salmonella microorganism, and a second differential indicator system comprising a second differential indicator compound that is converted by urease enzyme activity to a second detectable product. Optionally, the composition may comprise a third differential indicator system comprising a third differential indicator compound that is converted by a ?-galactosidase enzyme activity to a third detectable product. Methods of using the composition to detect a Salmonella microorganism are also provided.

Abstract: The disclosure provides culture devices and methods useful for detecting acid-producing bacteria in a sample. The devices include a nutrient medium and a pH indicator to detect and differentiate acid-producing microorganisms, such as lactic acid bacteria. Methods of use include detecting or enumerating acid-producing microorganisms. The methods further provide for the detection of gas-producing acid-producing bacteria.