WO2004081541A1 - Dispositif de dosage - Google Patents

Dispositif de dosage Download PDF

Info

Publication number
WO2004081541A1
WO2004081541A1 PCT/GB2004/001085 GB2004001085W WO2004081541A1 WO 2004081541 A1 WO2004081541 A1 WO 2004081541A1 GB 2004001085 W GB2004001085 W GB 2004001085W WO 2004081541 A1 WO2004081541 A1 WO 2004081541A1
Authority
WO
WIPO (PCT)
Prior art keywords
sample
assay device
test
fluid
chamber
Prior art date
Application number
PCT/GB2004/001085
Other languages
English (en)
Inventor
Kenneth Philip Jones
Andrew Wyn Thomas
Original Assignee
Allergenix Limited
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Allergenix Limited filed Critical Allergenix Limited
Publication of WO2004081541A1 publication Critical patent/WO2004081541A1/fr

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01L—CHEMICAL OR PHYSICAL LABORATORY APPARATUS FOR GENERAL USE
    • B01L3/00—Containers or dishes for laboratory use, e.g. laboratory glassware; Droppers
    • B01L3/50—Containers for the purpose of retaining a material to be analysed, e.g. test tubes
    • B01L3/502—Containers for the purpose of retaining a material to be analysed, e.g. test tubes with fluid transport, e.g. in multi-compartment structures
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N1/00—Sampling; Preparing specimens for investigation
    • G01N1/02—Devices for withdrawing samples
    • G01N1/22—Devices for withdrawing samples in the gaseous state
    • G01N1/2202—Devices for withdrawing samples in the gaseous state involving separation of sample components during sampling
    • G01N1/2205—Devices for withdrawing samples in the gaseous state involving separation of sample components during sampling with filters
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
    • G01N33/48—Biological material, e.g. blood, urine; Haemocytometers
    • G01N33/50—Chemical analysis of biological material, e.g. blood, urine; Testing involving biospecific ligand binding methods; Immunological testing
    • G01N33/52—Use of compounds or compositions for colorimetric, spectrophotometric or fluorometric investigation, e.g. use of reagent paper and including single- and multilayer analytical elements
    • G01N33/525—Multi-layer analytical elements
    • G01N33/526—Multi-layer analytical elements the element being adapted for a specific analyte
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
    • G01N33/48—Biological material, e.g. blood, urine; Haemocytometers
    • G01N33/50—Chemical analysis of biological material, e.g. blood, urine; Testing involving biospecific ligand binding methods; Immunological testing
    • G01N33/53—Immunoassay; Biospecific binding assay; Materials therefor
    • G01N33/543—Immunoassay; Biospecific binding assay; Materials therefor with an insoluble carrier for immobilising immunochemicals
    • G01N33/54366—Apparatus specially adapted for solid-phase testing
    • G01N33/54386—Analytical elements
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
    • G01N33/48—Biological material, e.g. blood, urine; Haemocytometers
    • G01N33/50—Chemical analysis of biological material, e.g. blood, urine; Testing involving biospecific ligand binding methods; Immunological testing
    • G01N33/53—Immunoassay; Biospecific binding assay; Materials therefor
    • G01N33/543—Immunoassay; Biospecific binding assay; Materials therefor with an insoluble carrier for immobilising immunochemicals
    • G01N33/54366—Apparatus specially adapted for solid-phase testing
    • G01N33/54386—Analytical elements
    • G01N33/54387—Immunochromatographic test strips
    • G01N33/54388—Immunochromatographic test strips based on lateral flow
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01L—CHEMICAL OR PHYSICAL LABORATORY APPARATUS FOR GENERAL USE
    • B01L2300/00—Additional constructional details
    • B01L2300/04—Closures and closing means
    • B01L2300/041—Connecting closures to device or container
    • B01L2300/042—Caps; Plugs
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01L—CHEMICAL OR PHYSICAL LABORATORY APPARATUS FOR GENERAL USE
    • B01L2300/00—Additional constructional details
    • B01L2300/06—Auxiliary integrated devices, integrated components
    • B01L2300/0627—Sensor or part of a sensor is integrated
    • B01L2300/0663—Whole sensors
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01L—CHEMICAL OR PHYSICAL LABORATORY APPARATUS FOR GENERAL USE
    • B01L2300/00—Additional constructional details
    • B01L2300/06—Auxiliary integrated devices, integrated components
    • B01L2300/0681—Filter
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01L—CHEMICAL OR PHYSICAL LABORATORY APPARATUS FOR GENERAL USE
    • B01L2300/00—Additional constructional details
    • B01L2300/08—Geometry, shape and general structure
    • B01L2300/0832—Geometry, shape and general structure cylindrical, tube shaped
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01L—CHEMICAL OR PHYSICAL LABORATORY APPARATUS FOR GENERAL USE
    • B01L2400/00—Moving or stopping fluids
    • B01L2400/04—Moving fluids with specific forces or mechanical means
    • B01L2400/0403—Moving fluids with specific forces or mechanical means specific forces
    • B01L2400/0406—Moving fluids with specific forces or mechanical means specific forces capillary forces
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01L—CHEMICAL OR PHYSICAL LABORATORY APPARATUS FOR GENERAL USE
    • B01L2400/00—Moving or stopping fluids
    • B01L2400/04—Moving fluids with specific forces or mechanical means
    • B01L2400/0475—Moving fluids with specific forces or mechanical means specific mechanical means and fluid pressure
    • B01L2400/0487—Moving fluids with specific forces or mechanical means specific mechanical means and fluid pressure fluid pressure, pneumatics
    • B01L2400/049—Moving fluids with specific forces or mechanical means specific mechanical means and fluid pressure fluid pressure, pneumatics vacuum
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01L—CHEMICAL OR PHYSICAL LABORATORY APPARATUS FOR GENERAL USE
    • B01L2400/00—Moving or stopping fluids
    • B01L2400/06—Valves, specific forms thereof
    • B01L2400/0633—Valves, specific forms thereof with moving parts
    • B01L2400/065—Valves, specific forms thereof with moving parts sliding valves
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N1/00—Sampling; Preparing specimens for investigation
    • G01N1/02—Devices for withdrawing samples
    • G01N1/22—Devices for withdrawing samples in the gaseous state
    • G01N1/24—Suction devices
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N1/00—Sampling; Preparing specimens for investigation
    • G01N1/02—Devices for withdrawing samples
    • G01N1/22—Devices for withdrawing samples in the gaseous state
    • G01N1/2202—Devices for withdrawing samples in the gaseous state involving separation of sample components during sampling
    • G01N2001/222—Other features
    • G01N2001/2223—Other features aerosol sampling devices

Definitions

  • the present invention relates to devices for the specific detection of analytes in samples of household material.
  • the invention relates to devices for the detection of house dust mite allergens .
  • the present invention provides an integrated device for collection and testing of house dust for allergens, which is suitable for use in the domestic environment, requires no skilled operation, and which minimises contact between the user and the material collected between collection and testing.
  • Embodiments of the invention also find application in other fields, which do not require the test material to be first collected from the environment, such as in the testing for particular analytes in bodily fluids, such as blood or urine, or solid or semi-solid material such as faeces.
  • the present invention provides an assay device comprising a sample chamber for receiving a test solution, and a test chamber for receiving detection means capable of detecting an analyte in the test solution, the device further comprising actuating means movable to enable an aliquot of test solution to pass between a sample exit port of said sample chamber and a sample entry port of said test chamber.
  • a measured amount of test solution passes between the sample and test chambers.
  • the sample exit and entry ports may be offset from one another, so that it is not possible to open a fluid flow passage between them, whatever the position of the actuating means.
  • the actuating means preferably comprises a fluid receptacle movable between a first position adjacent the sample exit port and a second position adjacent the sample entry port. The actuating means may be slidable between said first and second positions, preferably manually.
  • fluid communication is never established between sample and test chambers. Instead a measured amount of test solution is taken up by the fluid receptacle and moved between the exit and entry ports.
  • the fluid receptacle may comprise or consist of a bore or aperture extending through said actuating means.
  • the actuating means may be movable to establish fluid communication between the sample exit and sample entry ports, e.g. by opening a fluid flow passage between them.
  • the sample exit and entry ports may be aligned on opposite sides of the actuating means.
  • the actuating means may be biased to a position at which it prevents fluid communication between the fluid exit and entry ports and movable to a position at which it allows fluid communication between the ports . Further alternative embodiments will be apparent to the skilled person.
  • the assay device may be of various types. In certain embodiments it may be of a "closed" type, in which the sample chamber is sealed to fluid flow at one end, and where a test sample may simply be added to the sample chamber.
  • the device may be of "flow-through” type, in which a fluid is drawn through the device and one or more components of the fluid or carried by the fluid is retained in the sample chamber.
  • the sample chamber comprises retention means positioned between a fluid inlet and a fluid outlet of the device for retaining a desired component of a fluid in the sample chamber.
  • the device preferably possesses a fluid inlet and a fluid outlet which together define a fluid flow passage through which a desired fluid may be passed or drawn through the sample chamber, and a desired component of the fluid retained on contact with the retention means.
  • the desired component of the fluid will typically constitute or comprise the analyte to be tested for.
  • the retention means is a filter.
  • the skilled person will be able to select suitable materials and pore sizes depending on the nature of the fluid and/or the component to be retained.
  • the flow-through device is used for detection of house dust mite allergens .
  • the filter is preferably capable of retaining airborne solid material, e.g. dust mites or their faeces.
  • Dust mite faecal pellets are around 0.3 - 50 micrometers in diameter, and a cellulose based material having a pore size ranging from 10 to 50 micrometers has been found to provide a good balance between obtaining satisfactory airflow through the device while retaining enough test material on the filter to give a strong positive signal in an immunoassay for the Der pi antigen .
  • the retention means may be contacted with a suitable solvent or other liquid in order to solubilise or suspend the retained material.
  • a suitable solvent or other liquid may comprise a surfactant or detergent and/or one or more enzymes to aid solubilisation or suspension.
  • a suitable extraction fluid may comprise an aqueous buffer such as phosphate buffered saline, a surfactant such as Tween 20, and/or an enzyme such as chitinase (see e.g. W93/18404) .
  • the sample chamber is sealable following addition of the solvent or sample solution, e.g. by means of a cap or lid.
  • the retention means is substantially impermeable to the solvent to be added, to prevent flow of the solvent from the sample chamber.
  • the retention means is permeable to air, but impermeable, or substantially impermeable to water.
  • the fluid outlet may be sealable prior to addition of the solvent to the sample chamber, e.g. by means of a cap or lid.
  • the sample exit port of the sample chamber is typically located between said the retention means and the fluid inlet.
  • the fluid may be passed or drawn through the sample chamber by any suitable means.
  • the fluid is air, and is drawn through the sample chamber by a standard vacuum cleaner.
  • the fluid outlet of the assay device is preferably adapted for connection to the hose of a standard vacuum cleaner.
  • the device may comprise an attachment unit having an internal taper to enable a snug fit with hoses of different diameters.
  • the attachment unit may be located between the fluid outlet and the retention means .
  • means may be provided for agitating the test solution within the sample chamber.
  • the agitating means is provided with a handle located outside the sample chamber for manipulation by a user, and suitable agitating means, for example a blade, spatula or stirrer element, located inside the chamber for agitation of the test solution.
  • suitable agitating means for example a blade, spatula or stirrer element, located inside the chamber for agitation of the test solution.
  • a lid may be provided to seal the sample inlet or fluid inlet, with a suitable agitating device extending therethrough.
  • the agitating device may be movable laterally (to stir the sample) and/or axially (e.g. by a piston-type action, to disrupt a sample) relative to the sample chamber.
  • the device may be provided with means to prevent suspended solid material from passing through the sample exit port, while allowing substantially free flow of liquid (typically the test solution) .
  • the device may therefore comprise sieving means adapted to trap solid material adjacent or against the retention means or the bottom surface of the sample chamber, while allowing liquid to flow through or around it.
  • said sieving means may comprise an axially movable plunger having a foraminous head (e.g. comprising a web of mesh) fitting flush with the internal walls of the sample chamber, similar to the sort found in conventional cafetiere-type coffee makers .
  • the device is preferably an integral unit comprising both sample chamber and test chamber.
  • integral as used herein is not intended to mean that the sample chamber and detection chamber must be formed in one piece, although such a construction is possible. Rather, the a test unit comprising the test chamber, and a unit comprising the sample chamber remain attached throughout one use of the device from sample collection to obtaining a signal from detection means housed within the test chamber.
  • the device may be constructed such that the test unit is reversibly detachable from a unit comprising the sample chamber. The test unit may be detachable in order to remove the detection means after testing, and/or to insert fresh detection means into the test chamber.
  • Either or both of the units may be re-usable after a test has been performed. For example, after use, a filter located within the sample chamber may be changed for a fresh one, and a test strip (see below) housed in the test chamber replaced. Forming the two units separately may facilitate such operations, and also the cleaning of the device. Alternatively, all portions of the device may be disposable.
  • the detection means used in the device may be of any suitable type. It may be integral with the test chamber or removable. In preferred embodiments the detection means generates a visible signal in the presence of the target analyte. The intensity of the signal may correlate with the concentration of the target analyte in the test solution.
  • the detection means uses capillary flow to bring the test solution into contact with reagents for detection of the analyte.
  • a preferred format for the detection means is a test-strip format of the kind used in lateral flow assays. These typically comprise a solid material that conducts fluid by capillary flow, such that a fluid sample to be tested for the presence of an analyte of interest can pass from one part of the strip to another. Additionally, the solid material supports the various reagents required for detection of the analyte of interest, according to the design of the particular assay. A reagent may remain immobilised on the solid material or may be solubilised by the sample and/or any buffer solution used allowing it to pass through the device.
  • Such strips take many formats, but commonly the various reagents of the assay are located on the solid support material in distinct zones.
  • the zones are suitably positioned with respect to one another to enable the reactions of the assay to proceed.
  • the zones may be present on a single absorbent component of the solid support or on different absorbent components of the support, arranged (typically abutting or partially overlapping) to conduct fluid through the device as required.
  • Suitable materials for the solid support and absorbent components include nylon, glass fibre and nitrocellulose .
  • the distinct zones provided by the different absorbent components may include a sample application zone, one or more reaction zones, one or more indicator or detection zones and an absorbent zone (for example, into which excess sample and/or reagents can flow, for removal from the reaction, indicator and/or detection zone(s) ) .
  • the actual nature, number and arrangement of zones provided by the components will vary according to the nature of the target analyte and the requirements of the design of a particular assay.
  • Test-strips of this kind typically rely on immunological detection of the analyte, in which the target analyte is brought by capillary flow into contact with a first antibody specific for the target analyte in a zone of the strip to form an immunological complex.
  • the first antibody is typically labelled, e.g. with a gold conjugate.
  • Detection of the complex may be carried out at an upstream region of the strip, e.g. with an immobilised second antibody specific for a different epitope of the target analyte, which causes localisation of the labelled first antibody in sufficient density for the label to become visible.
  • the test chamber preferably comprises a window for viewing that signal so that the detection means need not be removed from the device.
  • the present invention further comprises a kit comprising an assay device, detection means, and/or extraction fluid as herein described, optionally further comprising instructions for use.
  • Figure 1 is an exploded view of a flow-through-type device adapted for connection to a vacuum cleaner.
  • Figure 2 is a cross-section of the device shown in Figure 1.
  • Figure 3 shows the device of Figures 1 and 2 connected to the hose of a vacuum cleaner.
  • Figure 4 is a cross-section of a closed-type device.
  • Figure 5 is a cross-section of a closed-type device having an integral homogenising rod.
  • a flow-through type assay device 1 for detection of allergens in the faeces of house dust mites comprises a substantially cylindrical collection unit 3 having an air inlet 5 and an air outlet 7.
  • a partition 9 is located approximately one-fifth of the way between the outlet 7 and inlet 5 with a central hole 11 to allow passage of air through the collection unit.
  • the partition 9 divides the collection unit into an upper sample chamber 31 and a lower attachment unit 33 for attachment to the hose 50 of a vacuum cleaner as shown in Figure 3.
  • the inner walls of the attachment unit 33 are tapered towards partition 9 to enable a snug fit with vacuum cleaner hoses of different widths.
  • a cellulose filter 13 having pores of various sizes ranging from 10 to 50 micrometers is supported on the sample chamber side of partition 9.
  • a sample exit aperture 35 extends through the wall of sample chamber 31 adjacent filter 13.
  • Surrounding sample exit aperture 35 on the exterior surface of collection unit 3 is an elongate rectangular U-shaped mounting portion 37, open at the end nearest inlet 5, which forms a mounting for receiving a complementarily-shaped elongate test unit 4 by a snap-fit.
  • Test unit 4 comprises a base portion 41 and a cover 43, which together define a test chamber 45.
  • Cover 43 has a longitudinal slot 49 formed at the end nearest air inlet 5.
  • Test chamber 45 opens into slot 49 via an aperture 47.
  • Test chamber 45 is sized to receive a test-strip assay device 60, which is inserted through aperture 47.
  • a sample inlet aperture 42 extends through base portion 41 to the test chamber 45 at the end of the test unit nearest outlet 7, and is spaced axially towards the outlet 7 of collector unit 3 from sample outlet aperture 35 of the collection unit 1.
  • test unit 4 When test unit 4 is attached to mounting portion 37, its base 41 is spaced from the exterior surface of the collector unit 3 to define a channel 6 which slidingly receives a rectangular actuator 8.
  • Actuator 8 is movable manually in channel 6 by means of a grip portion 81 mounted on stem 83 which extends outwardly of cover 43 through slot 49.
  • a sample-receiving aperture 85 extends through actuator 8 at the end remote from grip 81.
  • Actuator 8 is slidable in channel 6 between a first position, in which sample-receiving aperture 85 is aligned with sample exit aperture 35 of the collector unit 3, and a second position in which sample-receiving aperture 85 is aligned with sample entry aperture 42 of test unit 4.
  • Transverse ridges 87 standing proud of actuator 8 may engage with complementary grooves (not shown) of channel 6 in order to stabilise actuator 8 in either or both of these positions, and may also function as fluid seals, to prevent leakage of fluid along channel 6 either side of actuator 8.
  • test-strip assay device 60 for detection of a target analyte is inserted into test chamber 45, such that its sample application point is located adjacent sample entry aperture 42.
  • Actuator 8 is positioned so that sample- receiving aperture 85 is aligned with sample exit aperture 35, and attachment unit 33 is connected to the hose of a conventional vacuum cleaner as shown in Figure 3.
  • the vacuum cleaner is then used to draw air through collection unit 3 from an article or area suspected to be contaminated with dust mites, and solid airborne material is retained on filter 13.
  • the device is then removed from the vacuum cleaner hose and fluid outlet 78 capped with a snap- fit lid (not shown) .
  • Extraction fluid is added to the filter through fluid inlet 5, which is then also capped with a cylindrical lid (not shown) .
  • Enough extraction fluid is added to cover sample exit aperture 35 when the device is stood upright on the fluid outlet end, so that an aliquot of the extraction fluid enters the sample-receiving aperture 85 of actuator 8.
  • the assay device may be agitated to disperse, disrupt or dissolve the target analyte in the extraction fluid.
  • the actuator is slid from the first position to the second position in which sample- receiving aperture 85 is adjacent sample entry aperture 42 of test device . The aliquot of sample held by sample- receiving aperture 85 is thus brought into contact with the sample application point of test-strip 60.
  • Analyte is conducted along the test-strip by capillary action in conventional manner.
  • the test strip typically provides a visible signal correlating to the presence, absence or amount of target analyte in the aliquot of sample.
  • the signal may be viewed through a window 48 located in the upper surface of cover 43.
  • FIGS 4 and 5 show closed format assay devices rather than the flow-through type device of Figures 1 to 3, and in which the same numbering will be used where possible.
  • the device of Figure 4 is squared off at fluid inlet 5, rather than having the sloped inlet of the device described above intended for use with a vacuum cleaner.
  • Inlet 5 is sealable with a snap-fit cap 15.
  • the device has a flat integral base 17 instead of fluid outlet 7, and lacks partition 9 and filter 11. Thus the entire interior of the collection unit constitutes a sample chamber 31.
  • a solid or liquid test material to be assayed for the presence or absence of a test analyte may be added to the sample chamber 31.
  • a solvent will typically be added to the sample chamber to disperse or dissolve the analyte to be tested for. Further reagents may be added if desired. Assay is performed as for the flow-through device described above.
  • the device of Figure 5 has a homogeniser rod 19 extending through a slot (not shown) in cap 15, having at opposite ends a handle portion 21, located outside the sample chamber and a stirring loop 23 located inside the sample chamber for agitation of a sample, to facilitate mixing of liquid components, or disruption, dispersion or dissolution of solid components in the liquid sample.
  • Homogeniser rod 19 may be slidable in the slot of cap 15 in order that it may be moved axially within sample chamber 31.
  • the device may be reusable, but in preferred embodiments is disposable after one use.
  • the device described enables collection of dust or other material, and testing for a target analyte, with minimal user contact.
  • a flow-through device as described above was used for assay of the house dust mite allergen Der pi found in dust mite faeces .
  • a lateral flow test strip was prepared as follows :
  • Undiluted capture antibody (lmg/ml) detected antigen over the following range 2.5, 25 and 250ng/ml) . A graded colour response was observed over this dilution range. Lateral flow kinetics of the test strip were tested using 25ng/ml of purified test antigen.
  • a colour comparison card was constructed for quantification of test strip results. 3 colour intensities covering the range of 2.5, 25 and 250 ng/ l Der pi antigen were made by directly striping appropriately diluted samples of gold conjugated antibody onto a test strip. The results of the test strip after 30 mins was then compared to the comparison card to determine the level of antigen present in the sample
  • Environmental sampling was performed by attaching the collection device to a Dyson ® vacuum cleaner and sampling an area the size of an A4 sheet (for beds) and an A3 sheet (for carpets) . Vacuuming was performed for 1 min in each case. The sample collected on the filter was then re-suspended in 10 ml of diluent (phosphate buffered saline/1% Tween 20) and left for 5 mins. 200ul of dissolved sample was then applied to the test strip and the results determined after 30 mins by comparison of the test strip colour to the comparison colour card. Table 1. Comparison of Der pi ELISA assay data and visual estimation of dipstick intensity for the same samples collected from di erent environmental sources .
  • the detection range was 10 - fold higher for environmental dust samples as compared to that obtained for purified Der-Pl antigen solutions. This was not surprising as the environmental sample contains large amounts of particles and debris that alter the lateral flow kinetics of the test strip.

Landscapes

  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Immunology (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Hematology (AREA)
  • Biomedical Technology (AREA)
  • Molecular Biology (AREA)
  • Urology & Nephrology (AREA)
  • Analytical Chemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • Pathology (AREA)
  • General Physics & Mathematics (AREA)
  • Biochemistry (AREA)
  • Physics & Mathematics (AREA)
  • Cell Biology (AREA)
  • Medicinal Chemistry (AREA)
  • Food Science & Technology (AREA)
  • Microbiology (AREA)
  • Biotechnology (AREA)
  • Clinical Laboratory Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Investigating Or Analysing Biological Materials (AREA)
  • Sampling And Sample Adjustment (AREA)

Abstract

L'invention concerne un dispositif de dosage (1) comprenant une chambre d'échantillonnage (31) destinée à recevoir une solution d'essai, et une chambre d'essai (45) destinée à recevoir des organes de détection (60), par exemple une bande d'essai à écoulement latéral, pouvant détecter un analyte cible dans ladite solution d'essai. Le dispositif comprend en outre des organes de commande (8) mobiles qui permettent à une partie aliquote de la solution d'essai de passer entre un port de sortie (35) d'échantillon de la chambre d'échantillonnage et un port d'entrée (42) d'échantillon de la chambre d'essai (45). Dans des modes de réalisation préférés, le dispositif est conçu pour se connecter à un tuyau souple d'aspirateur afin d'aspirer l'air traversant la chambre d'échantillonnage (45), et comprend un filtre (13) qui retient les matières solides, par exemple des antigènes d'acariens des poussières dans la chambre d'essai (45).
PCT/GB2004/001085 2003-03-14 2004-03-12 Dispositif de dosage WO2004081541A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB0305892.2 2003-03-14
GBGB0305892.2A GB0305892D0 (en) 2003-03-14 2003-03-14 Assay device

Publications (1)

Publication Number Publication Date
WO2004081541A1 true WO2004081541A1 (fr) 2004-09-23

Family

ID=9954797

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/GB2004/001085 WO2004081541A1 (fr) 2003-03-14 2004-03-12 Dispositif de dosage

Country Status (2)

Country Link
GB (1) GB0305892D0 (fr)
WO (1) WO2004081541A1 (fr)

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008541009A (ja) * 2005-04-30 2008-11-20 オークビル・ホンコン・カンパニー・リミテツド サンプルの採取および分析のための装置および方法
GB2453743A (en) * 2007-10-16 2009-04-22 Porvair Filtration Group Ltd Testing apparatus and method with one-way action
WO2010017299A2 (fr) 2008-08-05 2010-02-11 Inverness Medical Switzerland Gmbh Plate-forme universelle de tests pour diagnostics médicaux et appareil de lecture de plates-formes de tests
DE102015218441A1 (de) 2015-09-25 2017-03-30 Robert Bosch Gmbh Staubsauger und Verwendung eines Biosensors
US10260999B2 (en) * 2012-09-19 2019-04-16 Amichai Glattstein Sampling device
JP6771690B1 (ja) * 2019-07-29 2020-10-21 三菱電機株式会社 電気掃除機およびダスト採取スティック
WO2021019668A1 (fr) * 2019-07-30 2021-02-04 三菱電機株式会社 Système de diagnostic, collecteur de poussière, produit électronique grand public et procédé de diagnostic
US11541392B2 (en) * 2016-05-06 2023-01-03 Korea University Research And Business Foundation Apparatus for testing of platelet using blockage phenomenon
WO2023274470A1 (fr) * 2021-07-02 2023-01-05 Headis Gmbh Accessoire d'aspirateur conçu pour un tuyau d'aspiration d'un aspirateur pour séparer par criblage de manière non destructive des objets et/ou des êtres vivants, comprenant un matériau de protection contre les chocs
KR102699709B1 (ko) 2022-03-23 2024-08-28 주식회사 이바이오젠 진드기와 유해물질의 검출이 가능한 무선 핸디형 진공청소기

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5001463A (en) * 1989-02-21 1991-03-19 Hamburger Robert N Method and apparatus for detecting airborne allergen particulates
US5679535A (en) * 1992-03-05 1997-10-21 University Collge Dublin Apparatus, kit and method for the collection and determination of environmental antigens
GB2371768A (en) * 2001-02-01 2002-08-07 Mesosystems Technology Inc Biological individual sampler
US20020173047A1 (en) * 2001-05-18 2002-11-21 Hudak Robert Thomas In line test device and methods of use

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5001463A (en) * 1989-02-21 1991-03-19 Hamburger Robert N Method and apparatus for detecting airborne allergen particulates
US5679535A (en) * 1992-03-05 1997-10-21 University Collge Dublin Apparatus, kit and method for the collection and determination of environmental antigens
GB2371768A (en) * 2001-02-01 2002-08-07 Mesosystems Technology Inc Biological individual sampler
US20020173047A1 (en) * 2001-05-18 2002-11-21 Hudak Robert Thomas In line test device and methods of use

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008541009A (ja) * 2005-04-30 2008-11-20 オークビル・ホンコン・カンパニー・リミテツド サンプルの採取および分析のための装置および方法
GB2453743A (en) * 2007-10-16 2009-04-22 Porvair Filtration Group Ltd Testing apparatus and method with one-way action
WO2009050436A1 (fr) * 2007-10-16 2009-04-23 Porvair Filtration Group Limited Appareil et procédé d'essai à action unidirectionnelle
WO2010017299A2 (fr) 2008-08-05 2010-02-11 Inverness Medical Switzerland Gmbh Plate-forme universelle de tests pour diagnostics médicaux et appareil de lecture de plates-formes de tests
WO2010017299A3 (fr) * 2008-08-05 2010-04-15 Inverness Medical Switzerland Gmbh Plate-forme universelle de tests pour diagnostics médicaux et appareil de lecture de plates-formes de tests
US10260999B2 (en) * 2012-09-19 2019-04-16 Amichai Glattstein Sampling device
DE102015218441A1 (de) 2015-09-25 2017-03-30 Robert Bosch Gmbh Staubsauger und Verwendung eines Biosensors
US11541392B2 (en) * 2016-05-06 2023-01-03 Korea University Research And Business Foundation Apparatus for testing of platelet using blockage phenomenon
JP6771690B1 (ja) * 2019-07-29 2020-10-21 三菱電機株式会社 電気掃除機およびダスト採取スティック
WO2021019646A1 (fr) * 2019-07-29 2021-02-04 三菱電機株式会社 Appareil domestique et collecteur de poussière
WO2021019668A1 (fr) * 2019-07-30 2021-02-04 三菱電機株式会社 Système de diagnostic, collecteur de poussière, produit électronique grand public et procédé de diagnostic
WO2023274470A1 (fr) * 2021-07-02 2023-01-05 Headis Gmbh Accessoire d'aspirateur conçu pour un tuyau d'aspiration d'un aspirateur pour séparer par criblage de manière non destructive des objets et/ou des êtres vivants, comprenant un matériau de protection contre les chocs
KR102699709B1 (ko) 2022-03-23 2024-08-28 주식회사 이바이오젠 진드기와 유해물질의 검출이 가능한 무선 핸디형 진공청소기

Also Published As

Publication number Publication date
GB0305892D0 (en) 2003-04-16

Similar Documents

Publication Publication Date Title
US5358690A (en) Environmental sample collection and membrane testing device
US5679535A (en) Apparatus, kit and method for the collection and determination of environmental antigens
US5393496A (en) Saliva sampling device and sample adequacy system
US7473563B2 (en) Environmental sampling and testing device
AU632467B2 (en) Improved sol capture immunoassay kit and procedure
JP4040110B2 (ja) 膜ベースでの検定のための分析装置
US6372516B1 (en) Lateral flow test device
AU669863B2 (en) Capillary blood antigen testing apparatus
US7338634B2 (en) Quantitative fecal examination apparatus
JP2002514916A (ja) 汚染物質の検出方法
JPH0457226B2 (fr)
CA2457930A1 (fr) Procede et appareil d'epreuve diagnostique
JP2007516444A (ja) 収容型綿棒ベース診断用システム
JP2008516236A (ja) サンプル受け取りデバイスおよびその使用方法
WO2004081541A1 (fr) Dispositif de dosage
TWI631337B (zh) 檢體檢查裝置
JP4938036B2 (ja) ピボットアームを備えたサンプル収集／試験装置
JP2009503551A (ja) 検体を検出するための装置アセンブリと方法
JP2007046959A (ja) イムノクロマトグラフィー測定用キット
KR102483098B1 (ko) 검체 삽입형 진단키트
JPH0517652Y2 (fr)
JPH03233360A (ja) マルチウエルテスト
CN208172011U (zh) 免疫层析检测试剂盒
WO2009140330A1 (fr) Système de transfert d’échantillon de surface
JPH0750106B2 (ja) 糞便採取容器の使用方法

Legal Events

Date Code Title Description
AK Designated states

Kind code of ref document: A1

Designated state(s): AE AG AL AM AT AU AZ BA BB BG BR BW BY BZ CA CH CN CO CR CU CZ DE DK DM DZ EC EE EG ES FI GB GD GE GH GM HR HU ID IL IN IS JP KE KG KP KR KZ LC LK LR LS LT LU LV MA MD MG MK MN MW MX MZ NA NI NO NZ OM PG PH PL PT RO RU SC SD SE SG SK SL SY TJ TM TN TR TT TZ UA UG US UZ VC VN YU ZA ZM ZW

AL Designated countries for regional patents

Kind code of ref document: A1

Designated state(s): BW GH GM KE LS MW MZ SD SL SZ TZ UG ZM ZW AM AZ BY KG KZ MD RU TJ TM AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IT LU MC NL PL PT RO SE SI SK TR BF BJ CF CG CI CM GA GN GQ GW ML MR NE SN TD TG

121 Ep: the epo has been informed by wipo that ep was designated in this application
122 Ep: pct application non-entry in european phase