CN106290848A - A kind of meningitis bacterium emulsion technique detection kit - Google Patents
A kind of meningitis bacterium emulsion technique detection kit Download PDFInfo
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- CN106290848A CN106290848A CN201510243093.5A CN201510243093A CN106290848A CN 106290848 A CN106290848 A CN 106290848A CN 201510243093 A CN201510243093 A CN 201510243093A CN 106290848 A CN106290848 A CN 106290848A
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- latex
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- 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
- G01N33/569—Immunoassay; Biospecific binding assay; Materials therefor for microorganisms, e.g. protozoa, bacteria, viruses
- G01N33/56911—Bacteria
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2800/00—Detection or diagnosis of diseases
- G01N2800/70—Mechanisms involved in disease identification
- G01N2800/7095—Inflammation
Abstract
The present invention relates to emulsion technique immunochromatography field, specifically disclose a kind of meningitis bacterium emulsion technique detection kit, including reagent strip, described reagent strip includes substrate, filter sample paper, sensitization latex polyester film, immunity nitrocellulose filter and absorbent paper, described filter sample paper, sensitization latex polyester film, immunity nitrocellulose filter and absorbent paper tandem array successively being fixed on described substrate, meningitis recombinant antigen and the rabbit igg polyclonal antibody of colored latex particles labelling it is coated with on described sensitization latex polyester film, immunity nitrocellulose filter is provided with the detection line being coated meningitis recombinant antigen and the nature controlling line being coated goat anti-rabbit igg polyclonal antibody.The meningitis bacterium emulsion technique detection kit of the present invention is quick on the draw, easy to detect, testing result is stable, cost-effective.
Description
Technical field
The present invention relates to immunochromatography technique field, be specifically related to a kind of meningitis bacterium detection kit and preparation and application thereof.
Background technology
Neisseria meningitidis is called for short meningococcus, is the pathogen causing epidemic cerebrospinal meningitis.The mankind are that it is unique
Host, can field planting on the nasopharynx part mucosa of the mankind, main by the spittle directly from air by caused by respiratory infectious,
The most popular in season at the beginning of last month of spring in winter.Epidemic cerebrospinal meningitis main clinical manifestation for generate heat, have a headache, vomit, skin viscous
Film petechia, ecchymosis and meningeal irritation sign.Severe one can have septic shock and meningoencephalitis.Cerebrospinal fluid can be in suppurative change.
Either all can cause higher epidemic encephalitis M & M in developing country or developed country.
Epidemic cerebrospinal meningitis, especially fulminant type epidemic encephalitis disease progression are rapid, underlying cause of death be septicemia cause shock,
DIC and cerebral edema cerebral hernia.Therefore, diagnosis, tight disease observation early is the basis that primary disease is treated.
Summary of the invention
It is an object of the invention to overcome prior art defect, from improving detection sensitivity, it is provided that a kind of detection sensitivity height,
High specificity, detect quick meningitis bacterium emulsion technique detection kit.
A first aspect of the present invention discloses a kind of meningitis bacterium emulsion technique detection kit, including reagent strip, described reagent strip
Including substrate, filter sample paper, sensitization latex polyester film, immunity nitrocellulose filter and absorbent paper, described filter sample paper, sensitization breast
Glue polyester film, immunity nitrocellulose filter and absorbent paper tandem array successively are also fixed on described substrate, described sensitization latex
Meningitis recombinant antigen and the rabbit igg polyclonal antibody of colored latex particles labelling, immunity cellulose nitrate it is coated with on polyester film
Element film is provided with the detection line being coated meningitis recombinant antigen and the nature controlling line being coated goat anti-rabbit igg polyclonal antibody.
Preferably, described colored latex particles is the granules of polystyrene of particle diameter 290～300nm.
Preferably, the color of described colored latex particles is red.
Another aspect of the present invention, it is provided that the preparation method of a kind of meningitis bacterium emulsion technique detection kit, including following step
Rapid:
1) preparation of sensitization latex particle: with carboxylated polystyrene labelling meningitis recombinant antigen and many grams of rabbit igg
Grand antibody, it is thus achieved that sensitization latex particle；
2) preparation of sensitization latex polyester film: by step 1) the sensitization latex particle that obtains is coated polyester film, it is thus achieved that cause
Quick latex polyester film；
3) meningitis recombinant antigen and goat anti-rabbit igg polyclonal antibody are sprayed on respectively nitrocellulose filter detection line (T
Line) and the position of nature controlling line (C line) on, dry for standby, prepare immunity nitrocellulose filter；
4) filter sample paper, sensitization latex polyester film, immunity nitrocellulose filter, absorbent paper are pasted onto PVC sheet successively
On, cutting prepares reagent strip；
5) reagent strip is loaded plastic casing, it is thus achieved that meningitis bacterium emulsion technique detection kit.
Preferably, described step 1) being prepared as of sensitization latex particle:
A. taking the carboxylated polystyrene of certain volume, the carbonate buffer solution with 2～3 times of volume 20mM pH 6.0 is many
Secondary flushing, it is centrifuged, abandons supernatant, it is thus achieved that carboxylated granules of polystyrene precipitation；
B. the carboxylated polystyrene obtained by the phosphate buffer solution suspension previous step of 1～1.5 times of volume 20mM pH6.0
Granule precipitates, and adds the water solublity carbonization diimine of 1～1.5 times of volume, stirs 20～30 minutes under room temperature,
Finally repeatedly rinse with the borate buffer solution of 2～3 times of volume 0.01M pH 8.0, be centrifuged, abandon supernatant, it is thus achieved that
Thing to be marked；
C. the borate buffer adding 2～3 times of volume 0.2M pH 7.0 in the thing described to be marked that step b obtains makes breast
Glue suspension, and in described latex suspension, add meningitis recombinant antigen and rabbit igg polyclonal antibody；
D. fully reaction overnight, adds terminator and terminates reaction, it is thus achieved that sensitization latex particle.
In the preparation process of sensitization latex particle, the water solublity carbonization diimine of addition, each buffer solution volume all with just
On the basis of the volume of the carboxylated polystyrene that the beginning is taken, add by volume multiple of the present invention: such as the carboxyl taken
The volume of granules of polystyrene changed is 1ml, then the phosphate buffer solution volume needing pH 6.0 20mM added can be
1～1.5ml, pH 7.0 the volume of borate buffer of 0.2M be 2～3ml.
More excellent, in described step a, carbonate buffer solution is the 20mM pH 6.0 carbonate buffer solution containing 0.01%SDS.
The carbonate buffer solution being added with SDS can preferably wash away the surface-active substance of latex, and cleaning performance is more preferable.
More excellent, polystyrene concentrations carboxylated in described step a is 6～12w/v%.
More excellent, the centrifugal condition in described step a is 12000～14000rpm, centrifugal 10min.
More excellent, in described step b, the concentration of water solublity carbonization diimine is 9～10mg/ml.
More excellent, the centrifugal condition in described step b is 12000～14000rpm, centrifugal 10min.
More excellent, granules of polystyrene coupling meningitis recombinant antigen carboxylated in described step c latex suspension or rabbit igg
The amount of polyclonal antibody is: 0.5mg meningitis recombinant antigen or rabbit igg polyclonal antibody/10mg granules of polystyrene.
More excellent, in described step d, terminator is the Tris-HCl of 50mM pH 8.2.
In the present invention, v% refers to percent by volume；W/v% refers to percent weight in volume, as 1w/v% is in 100ml solution
Containing 1g material.
Preferably, described step 2) in the preparation of sensitization latex polyester film concretely comprise the following steps:
A. sensitization latex particle is diluted with latex buffer, it is thus achieved that the sensitization latex solution of 0.3～0.5w/v%；
B. the sensitization latex solution spraying polyester film prepared by step A, is dried, prepares sensitization latex polyester film.
More excellent, the latex buffer formulation in described step A is as follows: 9～11v%1.0M Tris liquid, and 0.25～0.35w/v
% PEG 20000,0.18～0.20w/v% bovine serum albumin, 0.15～0.25w/v% skim milk, 0.28～0.30
W/v% casein, and 0.04～0.06w/v% Hydrazoic acid,sodium salt, with salt acid for adjusting pH to 8.0 ± 0.02, surplus is water.
Optimum, the latex buffer formulation in described step A is as follows: 10v%1.0M Tris liquid, the poly-second of 0.3w/v% two
Alcohol 20000,0.2w/v% bovine serum albumin, 0.2w/v% skim milk, 0.3w/v% casein, and 0.05w/v% are folded
Sodium nitride, with salt acid for adjusting pH to 8.0 ± 0.02, surplus is water.
The most preferably, so that test kit has more preferably sensitivity and color developing effect, latex of the present invention delays
Rush liquid and also include following component: fructose, potassium chloride and glycine, and the total concentration of fructose, potassium chloride and glycine is
3.25～4.75g/L, the pH value of buffer is 7.3-7.5.
It is furthermore preferred that the concentration that each component is in latex buffer is:
Fructose 1.0-2.0g/L；Potassium chloride 0.25-0.5g/L；Glycine 2.0-2.25g/L.
More excellent, step B sprays polyester film with sensitization latex solution, every 261mm × 220mm polyester film sprays 1.28
Ml sensitization latex solution, is dried, and prepares sensitization latex polyester film.
Preferably, described step 3) in, it is sprayed on the goat anti-rabbit igg polyclonal antibody on nitrocellulose filter nature controlling line (C line)
Concentration be 1.0～2.0mg/ml, the meningitis recombinant antigen concentration being sprayed on nitrocellulose filter detection line (T line) be 1.0～
2.0mg/ml.Preferably, the long nitrocellulose filter of every 50m is coated with goat anti-rabbit igg polyclonal antibody and the 6ml of 6ml respectively
Meningitis recombinant antigen solution, detection line and the spacing of nature controlling line are 4.0～6.0mm.
Meningitis bacterium emulsion technique detection kit prepared by the present invention is highly sensitive, and the test kit of the high specificity present invention in addition is also
Having simple to operate, price is low, stores and the advantage such as convenient transportation.
The using method of meningitis bacterium detection kit of the present invention:
1. the detection of sample: being added dropwise in sample cell with suction pipe pipette samples liquid 2-3, measuring samples is under capillary action to suction
Water paper end layer is analysed, and passes sequentially through polyester film, nitrocellulose filter.After arriving polyester film, abundant by the label of latex labelling
Identifying and combine, continue to chromatograph on nitrocellulose filter, coated meningitis recombinant antigen occurs with on nitrocellulose filter
Immunoreation, shows corresponding red lines.
2. the interpretation of result: 8-15 minute sentence read result after dropping sample.
Positive: in detection line and the nature controlling line position of detectable bar, one red lines respectively to occur, represent in sample have meninges
The existence of scorching bacterium.
Negative: red lines only to occur in nature controlling line position, represents the existence without meningitis bacterium in sample.
Invalid: nature controlling line position occurs without red line, represent that result is invalid, should retry.
The beneficial effects of the present invention is: the meningitis bacterium emulsion technique detection kit of the present invention is highly sensitive, high specificity；
In addition the test kit of the present invention also has simple to operate, and price is low, stores and the advantage such as convenient transportation.
Accompanying drawing explanation
Fig. 1: meningitis bacterium emulsion technique detection kit reagent strip schematic diagram (1. filter sample paper 2. sensitization latex polyester film 3. immunity nitre
Acid cellulose film 4. absorbent paper 5. detects line 6. nature controlling line)
Detailed description of the invention
Below by way of specific instantiation, embodiments of the present invention being described, those skilled in the art can be taken off by this specification
The content of dew understands other advantages and effect of the present invention easily.The present invention can also be by the most different specific embodiment parties
Formula is carried out or applies, and the every details in this specification can also be based on different viewpoints and application, without departing from this
Various modification or change is carried out under bright spirit.
Before further describing the specific embodiment of the invention, it should be appreciated that protection scope of the present invention is not limited to following spy
Fixed specific embodiments；It is also understood that the term used in the embodiment of the present invention is specifically to be embodied as to describe
Scheme rather than in order to limit the scope of the invention；In description of the invention and claims, unless another in literary composition
Explicitly pointing out outward, singulative " ", " one " and " this " include plural form.
When embodiment provides numerical range, it should be appreciated that unless the present invention is otherwise noted, two end points of each numerical range
And any one numerical value all can be selected between two end points.Unless otherwise defined, all technology used in the present invention and section
The same meaning that technics and those skilled in the art of the present technique are generally understood that.Except in embodiment use concrete grammar, equipment,
Outside material, according to those skilled in the art's grasp to prior art and the record of the present invention, it is also possible to use and this
Any method, equipment and the material of the prior art that the method described in inventive embodiments, equipment, material are similar or equivalent comes
Realize the present invention.
Unless otherwise indicated, the experimental technique that disclosed in this invention, detection method, preparation method all use the art
Molecular biology, biochemistry, chromatin Structure and the analysis of routine, analytical chemistry, cell cultivation, recombinant DNA technology
And the routine techniques of association area.These technology have improved explanation in existing document, specifically can be found in Sambrook etc.
MOLECULAR CLONING:A LABORATORY MANUAL, Second edition, Cold Spring Harbor
Laboratory Press, 1989 and Third edition, 2001；Ausubel etc., CURRENT PROTOCOLS IN
MOLECULAR BIOLOGY, John Wiley&Sons, New York, 1987 and periodic updates；the
Series METHODS IN ENZYMOLOGY, Academic Press, San Diego；Wolffe, CHROMATIN
STRUCTURE AND FUNCTION, Third edition, Academic Press, San Diego, 1998；METHODS
IN ENZYMOLOGY, Vol.304, Chromatin (P.M.Wassarman and A.P.Wolffe, eds.), Academic
Press, San Diego, 1999；With METHODS IN MOLECULAR BIOLOGY, Vol.119, Chromatin
Protocols (P.B.Becker, ed.) Humana Press, Totowa, 1999 etc..
The preparation of embodiment 1 meningitis bacterium emulsion technique detection kit
Preparation process:
Method 1:
1. the preparation of sensitization latex particle:
A. take polystyrene latex carboxylated for 0.4ml 10% and put in centrifuge tube, add 1ml pH 6.0 20mM Han 0.01%SDS
Carbonic acid buffer rinse twice, 14000g/min is centrifuged 10min, abandons supernatant, it is thus achieved that carboxylated granules of polystyrene
Precipitation.
B. the carboxylated granules of polystyrene precipitation obtained by the phosphate buffer solution suspension previous step of 0.5ml pH 6.020mM,
And add 0.5ml 10% water solublity carbonization diimine, stir under room temperature 30 minutes, finally with 0.8ml 0.01M pH 8.0
Borate buffer solution flush three times, be centrifuged, abandon supernatant, it is thus achieved that thing to be marked.
C. the borate buffer adding 1ml 0.2M pH 7.0 in the thing to be marked that step b obtains makes latex suspension, and to this breast
Glue suspension adds 2mg meningitis recombinant antigen and 2mg rabbit igg polyclonal antibody.
After the most fully reacting 12 hours, the Tris-HCl adding 50mM pH8.2 terminates reaction as terminator, it is thus achieved that sensitization breast
Glue granule.
2. the preparation of sensitization latex polyester film:
(1) preparation of latex buffer: take 800ml purified water, add 100ml 1.0M Tris liquid inward, accurately weigh 3.0g
PEG 20000,2.0g bovine serum albumin, 2.0g skim milk, 3.0g casein solution, 0.5g Hydrazoic acid,sodium salt,
1.5g fructose, 0.4g potassium chloride, 2.20g glycine, add in solution, fully dissolve, mix homogeneously, regulate with hydrochloric acid
PH to 8.0, adds purified water to cumulative volume 1000ml.
(2) with the latex buffer dilution sensitization latex particle of previous step, it is thus achieved that the sensitization latex solution of 0.4w/v%.
(3) take on 1.28ml sensitization latex solution point latex machine specking polyester film after the pre-treatment, be placed at a temperature of 37 DEG C
Dry 2 hours, keep in Dark Place at sealing 4-30 DEG C, prepare sensitization latex polyester film.
3. the preparation of immunity nitrocellulose filter:
2.0mg/ml goat anti-rabbit igg polyclonal antibody and 1.5mg/ml meningitis recombinant antigen are sprayed on celluloid respectively
On the position of film nature controlling line and detection line, dry 2 hours at 37 DEG C, keep in Dark Place at sealing 4-30 DEG C, prepare immunity nitric acid
Cellulose membrane.Every long nitrocellulose filter of 50m is coated with goat anti-rabbit igg polyclonal antibody and the meningitis restructuring of 6ml respectively
Antigenic solution, the spacing of detection line and nature controlling line is 5mm.
4. filter sample paper, sensitization latex polyester film, immunity nitrocellulose filter, absorbent paper are pasted onto on PVC sheet successively, cutting system
Obtain reagent strip；Reagent strip is loaded plastic casing and prepares detection kit, it is thus achieved that meningitis bacterium emulsion technique detection kit.
(as shown in Figure 1).
Method 2:
1. the preparation of sensitization latex particle:
A. take polystyrene latex carboxylated for 1ml 6% and put in centrifuge tube, add 2ml pH 6.0 containing 0.01%SDS
The carbonic acid buffer of 20mM flushes three times, and 12000g/min is centrifuged 10min, abandons supernatant, it is thus achieved that carboxylated polyphenyl second
Alkene granule precipitates.
B. the carboxylated granules of polystyrene obtained by the phosphate buffer solution suspension previous step of 1.5ml pH 6.0 20mM sinks
Form sediment, and add 1.5ml 9% water solublity carbonization diimine, stir under room temperature 20 minutes, finally with 3ml 0.01M pH 8.0
Borate buffer solution flush three times, be centrifuged, abandon supernatant, it is thus achieved that thing to be marked.
C. the borate buffer adding 2ml pH 7.0 0.2M in the thing to be marked that step b obtains makes latex suspension, and to
This latex suspension adds 2.5mg meningitis recombinant antigen and 2.5mg rabbit igg polyclonal antibody.
D., after fully reacting overnight, add terminator and terminate reaction, it is thus achieved that sensitization latex particle.
2. the preparation of sensitization latex polyester film:
(1) preparation of latex buffer: take 800ml purified water, add 90ml 1.0M Tris liquid inward, accurately weigh 3.5g
PEG 20000,1.8g bovine serum albumin, 1.5g skim milk, 3.0g casein solution, 0.6g Hydrazoic acid,sodium salt
1.0g fructose, 0.25g potassium chloride, 2.00g glycine, add in solution, fully dissolve, mix homogeneously, adjust with hydrochloric acid
Joint pH to 8.0, adds purified water to cumulative volume 1000ml.
(2) with the latex buffer dilution sensitization latex particle of previous step, it is thus achieved that the sensitization latex solution of 0.2w/v%.
(3) take on 1.28ml sensitization latex solution point latex machine specking polyester film after the pre-treatment, be placed in the temperature of 37 DEG C
Lower drying 2 hours, keeps in Dark Place at sealing 4-30 DEG C, prepares sensitization latex polyester film.
3. the preparation of immunity nitrocellulose filter:
1.5mg/ml goat anti-rabbit igg polyclonal antibody and 2.0mg/ml meningitis recombinant antigen are sprayed on nitrocellulose filter respectively
On the position of nature controlling line and detection line, dry 2 hours at 37 DEG C, keep in Dark Place at sealing 4-30 DEG C, prepare immunity nitric acid fine
Dimension element film.Every long nitrocellulose filter of 50m is coated with the goat anti-rabbit igg polyclonal antibody of 6ml respectively and meningitis restructuring is anti-
Original solution, the spacing of detection line and nature controlling line is 5mm.
4. with method 1.
Method 3:
1. the preparation of sensitization latex particle:
A. take polystyrene latex carboxylated for 0.5ml 12% and put in centrifuge tube, add 1.5ml pH 6.0 containing 0.01%SDS
The carbonic acid buffer of 20mM rinses twice, and 13000g/min is centrifuged 10min, abandons supernatant, it is thus achieved that carboxylated polyphenyl second
Alkene granule precipitates.
B. the carboxylated granules of polystyrene obtained by the phosphate buffer solution suspension previous step of 0.5ml pH 6.0 20mM sinks
Form sediment, and add 0.5ml 10% water solublity carbonization diimine, stir under room temperature 25 minutes, finally with 1.5ml 0.01M pH8.0
Borate buffer solution rinse twice, be centrifuged, abandon supernatant, it is thus achieved that thing to be marked.
C. the borate buffer adding 1.5ml pH 7.0 0.2M in the thing to be marked that step b obtains makes latex suspension, and
3.75mg meningitis recombinant antigen and 3.75mg rabbit igg polyclonal antibody is added in this latex suspension.
D., after fully reacting overnight, add terminator and terminate reaction, it is thus achieved that sensitization latex particle.
2. the preparation of sensitization latex polyester film:
(1) preparation of latex buffer: take 800ml purified water, add 110ml 1.0M Tris liquid inward, accurately weigh 2.5g
PEG 20000,1.9g bovine serum albumin, 2.5g skim milk, 2.8g casein solution and 0.4g Hydrazoic acid,sodium salt
2.0g fructose, 0.5g potassium chloride, 2.25g glycine adds in solution, fully dissolves, mix homogeneously, regulate with hydrochloric acid
PH to 8.0, adds purified water to cumulative volume 1000ml.
(2) with the latex buffer dilution sensitization latex particle of previous step, it is thus achieved that the sensitization latex solution of 0.6w/v%.
(3) take on 1.28ml sensitization latex solution point latex machine specking polyester film after the pre-treatment, be placed in the temperature of 37 DEG C
Lower drying 2 hours, keeps in Dark Place at sealing 4-30 DEG C, prepares sensitization latex polyester film.
3. the preparation of immunity nitrocellulose filter:
1.0mg/ml goat anti-rabbit igg polyclonal antibody and 1.0mg/ml meningitis recombinant antigen are sprayed on nitrocellulose filter respectively
On the position of nature controlling line and detection line, dry 2 hours at 37 DEG C, keep in Dark Place at sealing 4-30 DEG C, prepare immunity nitric acid fine
Dimension element film.Every long nitrocellulose filter of 50m is coated with the goat anti-rabbit igg polyclonal antibody of 6ml respectively and meningitis restructuring is anti-
Original solution, the spacing of detection line and nature controlling line is 4mm.
4. with method 1.
The preparation of embodiment 2 contrast agent box
The preparation method of contrast agent box: without fructose, potassium chloride and glycine, other reagent and experiment in latex buffer
Method is all with method 1～3 in embodiment 1.
The specificity experiments of embodiment 4 meningitis bacterium emulsion technique detection kit
Detection method:
1. Example 1 preparation meningitis bacterium emulsion technique detection kit and the contrast agent box of embodiment 2, test kit is placed on
On level table.
2. the preparation of testing sample: by four class experimental subjecies of table 1, prepares a sample processing tube, is vertically put on process pipe holder,
And in sample cell, add 0.6ml distilled water；Using human serum as sample, equal-volume serum is poured in sample cell, fully stirs
Mix uniformly as testing sample.
3. every class experimental subject is 100 people, testing result such as table 1:
Table 1 meningitis bacterium emulsion technique detection kit specific test result
As seen from the above table, the meningitis bacterium emulsion technique detection kit of the present invention is all anti-without intersecting to escherichia coli and dysentery bacterium
Should, specificity is good.
Claims (10)
1. a meningitis bacterium detection kit, including reagent strip, described reagent strip includes substrate, filter sample paper, sensitization latex polyester
Film, immunity nitrocellulose filter and absorbent paper, described filter sample paper, sensitization latex polyester film, immunity nitrocellulose filter and
Absorbent paper tandem array successively is also fixed on described substrate, it is characterised in that be coated with on described sensitization latex polyester film
The meningitis recombinant antigen of colored latex particles labelling and rabbit igg polyclonal antibody, immunity nitrocellulose filter is provided with bag
By detection line and the nature controlling line being coated goat anti-rabbit igg polyclonal antibody of meningitis recombinant antigen.
2. test kit as claimed in claim 1, it is characterised in that described colored latex particles is the poly-of particle diameter 290～300nm
Styrene pellets.
3. the preparation method of the test kit described in claim 1-2 any claim, comprises the following steps:
1) preparation of sensitization latex particle: with carboxylated polystyrene labelling meningitis recombinant antigen and many grams of rabbit igg
Grand antibody, it is thus achieved that sensitization latex particle；
2) preparation of sensitization latex polyester film: by step 1) the sensitization latex particle that obtains is coated polyester film, it is thus achieved that cause
Quick latex polyester film；
3) meningitis recombinant antigen and goat anti-rabbit igg polyclonal antibody are sprayed on respectively nitrocellulose filter detection line and matter
On the position of control line, dry for standby, prepare immunity nitrocellulose filter；
4) filter sample paper, sensitization latex polyester film, immunity nitrocellulose filter, absorbent paper are pasted onto on PVC sheet successively,
Cutting prepares reagent strip；
5) reagent strip is loaded plastic casing, it is thus achieved that meningitis bacterium emulsion technique detection kit.
4. preparation method as claimed in claim 3, it is characterised in that described step 1) being prepared as of sensitization latex particle:
A. take the carboxylated polystyrene of certain volume, buffer with the carbonic acid of 2～3 times of volume 20mM pH 6.0
Solution repeatedly rinses, is centrifuged, abandons supernatant, it is thus achieved that carboxylated granules of polystyrene precipitation；
B. carboxylated the gathering obtained by the phosphate buffer solution suspension previous step of 1～1.5 times of volume 20mM pH6.0
Styrene pellets precipitates, and adds the water solublity carbonization diimine of 1～1.5 times of volume, stirs under room temperature
20～30 minutes, finally with the borate buffer solution of 2～3 times of volume 0.01M pH 8.0 repeatedly rinse,
It is centrifuged, abandons supernatant, it is thus achieved that thing to be marked；
C. in the thing described to be marked that step b obtains, add the borate buffer of 2～3 times of volume 0.2M pH 7.0
Make latex suspension, and in described latex suspension, add meningitis recombinant antigen and rabbit igg Anti-TNF-α
Body；
D. fully reaction overnight, adds terminator and terminates reaction, it is thus achieved that sensitization latex particle.
5. preparation method as claimed in claim 4, it is characterised in that in described step a, carbonate buffer solution is 20mM pH 6.0
Carbonate buffer solution containing 0.01%SDS.
6. preparation method as claimed in claim 4, it is characterised in that polystyrene concentrations carboxylated in described step a be 6～
12w/v%, in described step b, the concentration of water solublity carbonization diimine is 9～10mg/ml.
7. preparation method as claimed in claim 4, it is characterised in that polystyrene carboxylated in described step c latex suspension
The amount of granule coupling meningitis recombinant antigen or rabbit igg polyclonal antibody is: 0.5mg meningitis recombinant antigen or rabbit igg
Polyclonal antibody/10mg granules of polystyrene.
8. preparation method as claimed in claim 4, it is characterised in that described step 2) in the preparation tool of sensitization latex polyester film
Body step is:
A. sensitization latex particle is diluted with latex buffer, it is thus achieved that the sensitization latex solution of 0.3～0.5w/v%；
B. the sensitization latex solution spraying polyester film prepared by step A, is dried, prepares sensitization latex polyester film.
9. preparation method as claimed in claim 8, it is characterised in that the latex buffer formulation in described step A is as follows: 9～
11v%1.0M Tris liquid, 0.25～0.35w/v% PEG 20000,0.18～0.20w/v% bovine serum albumin,
0.15～0.25w/v% skim milk, 0.28～0.30w/v% casein, and 0.04～0.06w/v% Hydrazoic acid,sodium salt, use
Salt acid for adjusting pH is to 8.0 ± 0.02, and surplus is water.
10. the application in preparing meningitis bacterium detectable of the test kit described in claim 1-2 any claim.
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
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