Fecal sample test device and methods of use
The present invention includes devices and methods for the detection of an analyte in a fecal sample. The fecal sample test device includes a sample collection structure and sample collection housing, a detection housing, a fecal suspension solution or fecal dilution solution, a detection housing capable of attachment to the collection housing and an analyte detecting means. When attached, the collection housing permits a portion of liquid extracted sample to fluidly flow into the detection housing where the analyte detection means detects the presence or quantity of an analyte suspected of being present in the fecal sample.
1. A fecal test device comprising:
a. a sample collection structure;
b. a sample collection housing comprising a puncturable barrier, wherein said sample collection housing is capable of reversibly housing said sample collection structure;
c. a fecal suspension solution capable of substantially dissolving or solublizing a fecal sample, wherein the dissolved or solublized fecal sample may be stored in said sample collection housing for later testing;
d. a detection housing comprising a piercing structure positioned at the bottom of said detection housing, said piercing structure capable of piercing through said puncturable barrier, wherein said detection housing is capable of attachment to said sample collection housing by insertion of said piercing structure through said puncturable barrier and into said collection housing, wherein upon attachment said sample collection housing and said detection housing are in fluid communication, further wherein upon attachment said fecal suspension solution is volumetrically displaced upwards and against gravity from said sample collection housing into said detection housing by the presence of said piercing structure;
e. a labeled analyte binding compound capable of binding an analyte of interest, further wherein said labeled analyte binding compound is provided in a dried state and is capable of suspension upon exposure to said fecal suspension solution; and
f. an analyte detection means capable of detecting said analyte of interest bound to said labeled analyte binding compound, wherein said analyte detection means is positioned entirely within said detection housing for upward migration of said fecal suspension solution;
wherein the fecal test device comprises a storage configuration and a detection configuration, further wherein said storage configuration comprises:
i) said sample collection housing detached and free from contact from said detection housing thereby preventing fluid communication, and
ii) said sample collection structure, fecal sample and fecal suspension solution housed within said sample collection housing;
further wherein said detection configuration comprises:
i) said sample collection housing attached to said detection housing, and
ii) said sample collection housing, detection housing and analyte detection means in vertical alignment, further wherein said sample collection structure is free from contact with said detection housing;
further wherein the test device is a closed system in both said storage configuration and said detection configuration, which prevents exposure of said fecal sample to the outside environment in each configuration.
2. The fecal test device according to claim 1 , wherein said sample collection structure is integrated with a removable cap portion of said sample collection housing.
3. The fecal test device according to claim 2 , wherein said puncturable barrier comprises a plastic film adhered to said sample collection housing, wherein said puncturable barrier covers an aperture positioned at an end of said sample collection housing opposite said removable cap portion, further wherein said aperture accesses said sample collection housing wherein pierced.
4. The fecal test device according to claim 1 , wherein said fecal suspension solution is selected from the group consisting of a sodium chloride solution, a sodium phosphate solution and a tris hydrochroride solution.
5. The fecal test device according to claim 1 , wherein said insertion of said piercing structure comprises a piercing maneuver comprising a screw in process.
6. The fecal test device according to claim 1 , wherein said detection housing is transparent and provided in a shape selected from the group consisting of cylindrical, triangular, pyramidal, pentagonal, hexagonal, heptagonal, and octagonal; further wherein said detection housing fluidly communicates with said sample collection housing via a fluid communication channel within said piercing structure.
7. The fecal test device according to claim 1 , wherein said detection housing is positioned above said sample collection housing.
8. The fecal test device according to claim 1 , wherein said analyte detection means is an immunochromatographic detection test strip.
9. The fecal test device according to claim 1 , wherein said test device comprises two or more analyte detection means.
10. The fecal test device according to claim 9 , wherein two or more analyte detection means detect the same analyte, further wherein each of said at two or more analyte detection means comprises a different detection sensitivity or cut-off for the same analyte comprising an immobilized analyte binding compound, further wherein each of the immobilized binding compounds are provided in a different amount.
11. The fecal test device according to claim 9 , wherein said two or more analyte detection means detect two or more analytes comprising different immobilized and analyte specific binding compounds.
12. The fecal test device according to claim 1 , wherein said analyte detection means comprises a membrane strip with a detection zone that is not directly sunk into the fecal sample suspension solution, but is in contact with the fecal sample suspension solution via liquid chromatographic movement.
13. The fecal test device according to claim 11 , wherein said detection means comprises a membrane coated in part with an immobilized binding compound selected from the group consisting of an analyte specific antibody or an analyte specific antibody fragment, an analyte binding partner, and a same analyte.
14. The fecal test device according to claim 1 , wherein said analyte of interest is detected by the presence of said labeled analyte binding means along a portion of said detection means via an optical detection method or via an electronic means.
15. The fecal test device according to claim 1 , wherein said labeled analyte binding compound is a lyophilized ball or sphere.
16. The fecal test device according to claim 1 , wherein said labeled analyte binding compound is a vacuum or oven-heat dried mass associated with a supporting material.
17. The fecal test device according to claim 16 , wherein said supporting material is selected from the group consisting of glass fiber, paper pad, chemicals, carbohydrates and proteins.
18. The fecal test device according to claim 1 , wherein said labeled analyte binding compound is freely positioned within said detection housing, further wherein said labeled analyte binding compound is not physically attached to said detection means.
19. The fecal test device according to claim 1 , wherein said labeled analyte binding compound is positioned on and physically attached to said detection means.
20. The fecal test device according to claim 1 , wherein said analyte of interest is selected from the group consisting of fecal occult blood, calprotectin, rotavirus antigen, adenovirus antigen, Giardia lamblia, Cryptosporidium parvum, entamoeba histolytica, H. pylori antigen, pancreas elastase-1, lysozyme and alpha-1 antitripsin.
21. The fecal test device according to claim 1 , wherein said displacement upwards and against gravity from said sample collection housing into said detection housing occurs by fluid flow through said piercing structure and through a sample flow aperture of said detection housing.
22. The fecal test device according to claim 21 , wherein said labeled analyte binding compound is positioned within said piercing structure.
23. The fecal test device according to claim 8 , further comprising an adaptation, wherein said adaptation accepts said immunochromatographic detection test strip.
24. The fecal test device according to claim 1 , wherein an inner diameter of said detection housing is substantially the same as an inner diameter of said collection housing.