An analytical device comprising A) A first sealed compartment comprising an extraction solvent or extraction reagent within the device wherein the first compartment comprises a seal over an opening, B) A second compartment comprising an opening, wherein the opening of the second compartment is aligned with the opening of the first compartment, C) A reaction region comprising one or more reaction reagents wherein at least a portion of the reaction region is located below at least a portion of the first or second compartment and is configured to receive liquid flowing from the first or second compartment. D) A first fluid passage connecting the first or second compartment to the reaction region wherein the first fluid passage comprises a first surface energy gradient coating, E) A detection region comprising one or more detection agents wherein the detection region is located downstream of the reaction region and is configured to receive liquid flowing from the reaction region. F) A third compartment having an opening wherein at least a portion of the third compartment is located above the reaction region, and
wherein the openings of the first, second, and third compartments are configured to receive at least a portion of a sampler.

The disclosed technology includes a planar device for performing multiple biochemical assays at the same time, or nearly the same time. Each assay may include a biosample including a biochemical, enzyme, DNA, and/or any other biochemical or biological sample. Each assay may include one or more tags including dyes and/or other chemicals/reagents whose optical characteristics change based on chemical characteristics of the biological sample being tested. Each assay may be optically pumped to cause one or more of luminescence, phosphorescence, or fluorescence of the assay that may be detected by one or more optical detectors. For example, an assay may include two tags and a biosample. Each tag may be pumped by different wavelengths of light and may produce different wavelengths of light that is filtered and detected by one or more detectors. The pump wavelengths may be different from one another and different from the produced wavelengths.

A cartridge comprising a cartridge body and a capture medium holder disposed within the body, the capture medium holder comprising a platform configured to receive a capture medium, the capture medium holder being configured to move relative to the cartridge body between a sample collection position in which the platform is aligned with a sample inlet of the cartridge body and an inspection position in which the platform is aligned with an inspection window of the cartridge body.

A sensor device includes a porous substrate layer and an array of sensors to accept a sample. The array of sensors includes a plurality of sensors, each of the plurality of sensors includes respective semiconducting nanostructures with a respective capture reagent coupled to the semiconducting nanostructures that selectively binds to a respective target analyte in the sample. The array of sensors includes a first subset of sensors with first capture reagents to bind to biomarkers characteristic of a particular disease and a second subset of sensors with second capture reagents to bind to one of cytokines, chemokines, enzymes, metabolites, or antibodies present in the sample.

Disclosed herein are methods of detecting ascorbic acid in a urine sample from a subject. The methods comprise contacting at least a portion of the urine sample with a test strip comprising a reagent pad and detecting whether ascorbic acid is present in the urine sample. The detecting comprises measuring an intensity of color on the reagent pad, wherein a reduction in the intensity of color on the reagent pad indicates the presence of ascorbic acid.

Devices, systems, and methods for species and/or strain specific identification and assessment of susceptibility of microorganisms based on the response of sensors in a colorimetric sensor array to metabolic products of the microorganism. An exemplary method according to an embodiment of the present disclosure can include culturing a sample that contains microorganisms. The sample can be in a medium which is exposed to a colorimetric sensor array. A test substance can be introduced to the sample. The method can assess a susceptibility of the microorganisms to the test substance based on a change in at least one sensor in the colorimetric sensor array. Sensors in the colorimetric sensor array can change in response to volatile organic compounds produced by the microorganisms after addition of the test sub stance.

Disclosed is method of improving flow of a liquid sample in an assay device, as well as a method of performing an assay on a liquid sample for the detection of one or more analytes of interest. The methods use the addition of a reagent, such as a wash reagent, to wet the fluid flow path of a sample prior to sample addition, thereby improving flow of the sample through the fluid flow path that has been wetted as opposed to flow of the sample through the fluid flow path that has not been wetted. The reagent wets the fluid flow path between the sample addition zone and the wicking zone.

An impedance spectroscopy biosensor is provided that is fabricated on a stretchable substrate. The stretchable substrate is integrated with an impedance biosensor that undergoes cyclic strain without cracking. The biosensor is formed by curing an elastomer precursor while on a pre-tensioned membrane that includes a conductive electrode. The resulting elastomeric material is released from the support after curing which releases the pre-tensioned state to produce the biosensor.

In various embodiments, the present disclosure provides testers for detecting a bacterial infection and methods of production and uses thereof.

Provided herein, in some embodiments, are rapid diagnostic tests comprising a lateral flow strip and an integrated swab head. The tests may be used to detect, for example, one or more pathogens, such as viral, bacterial, fungal, parasitic, or protozoan pathogens. Further embodiments provide methods of detecting genetic abnormalities. Nucleic acid tests using the diagnostic tests are provided.