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Fluorescent latex immunochromatography detection reagent for detecting falciparum malaria and preparation method thereof

A technology of immunochromatography detection and fluorescent glue, which is applied in the field of disease detection, can solve the problems of complex equipment and instruments, cannot be reused, and cumbersome operation, and achieves the effect of low cost and easy operation

Inactive Publication Date: 2016-08-03
GUANGZHOU WONDFO BIOTECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Malaria diagnosis is an important part of malaria prevention and control work. At present, the traditional microscopic examination method is still the "gold standard" of malaria diagnosis method. Using the thick blood film method to inspect 100 fields of view can theoretically detect 4 Plasmodium / μl, But its disadvantage is that it is time-consuming and labor-intensive, and at the same time, the inspector needs to have professional knowledge and experience
The blood buffy coat quantitative method (QBC technology) developed in recent years has the disadvantages that the capillary used is expensive, cannot be reused, and the operation is cumbersome, and it is difficult to effectively identify insect species and count protozoa, so it is not applicable Diagnosis of a single malaria patient
However, DNA probe technology and polymerase chain reaction (PCR) and other methods developed in recent years have certain limitations when used in the field, require high operating technology and complex equipment, and are not suitable for traditional methods. Large scale field application

Method used

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  • Fluorescent latex immunochromatography detection reagent for detecting falciparum malaria and preparation method thereof

Examples

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Effect test

Embodiment 1

[0022] A fluorescent latex immunochromatographic detection reagent for detecting falciparum malaria, which is composed of a glass fiber sample pad 1, a glass fiber bonding pad 2, a nitrocellulose reaction membrane 4 and a water-absorbing paper 6 which are successively overlapped and pasted and fixed on a PVC base plate 7, The PVC bottom plate 7 is cut flat, with a thickness of 0.2mm, a length of 7.0cm, and a width of 4mm. A detection line 3 is provided at a distance of 1.75cm from one end of the nitrocellulose reaction membrane 4 that is adjacent to the bonding pad 2, and the A quality control line 5 is provided at a distance of 0.65 cm from the detection line 3, and the binding pad 2 is coated with a fluorescent latex-labeled anti-HRP-2 monoclonal antibody at a concentration of 0.4 mg / ml, and the binding pad is also coated with Covered with fluorescent latex-labeled anti-rabbit IgG, the concentration is 0.2mg / ml, the detection line 3 is coated with anti-HRP-2 monoclonal antibo...

Embodiment 2

[0024] A fluorescent latex immunochromatographic detection reagent for detecting falciparum malaria, which is composed of a glass fiber sample pad 1, a glass fiber bonding pad 2, a nitrocellulose reaction membrane 4 and a water-absorbing paper 6 which are successively overlapped and pasted and fixed on a PVC base plate 7, The PVC bottom plate 7 is cut flat, with a thickness of 0.2mm, a length of 7.0cm, and a width of 4mm. A detection line 3 is provided at a distance of 1.75cm from one end of the nitrocellulose reaction membrane 4 that is adjacent to the bonding pad 2, and the A quality control line 5 is provided at a distance of 0.65 cm from the detection line 3, and the binding pad 2 is coated with a fluorescent latex-labeled anti-HRP-2 monoclonal antibody at a concentration of 1.0 mg / ml, and the binding pad is also coated with Coated with fluorescent latex-labeled anti-rabbit IgG, the concentration is 0.4mg / ml, the detection line 3 is coated with anti-HRP-2 monoclonal antibod...

Embodiment 3

[0026] A preparation method of a fluorescent latex immunochromatography detection reagent for detecting falciparum malaria is as follows:

[0027] (1) Prepare the binding pad according to the following steps:

[0028] a) Preparation of labeling washing solution: add 2% BSA to 0.01 MPBS solution with a pH value of 7.5, and store at 2-8°C for later use.

[0029] b) Preparation of latex cross-linking agent: add 50 mg / ml EDC (carbodiimide) solution into 0.05 MPBS solution buffer with pH value of 7.5, and prepare it immediately for use.

[0030] c) Preparation of latex preservation solution: Mix 1% BSA, 0.5% skimmed milk, 0.05% NaN3, 0.1% Tween-20 and 0.01MPBS solution with a pH value of 7.5, and place at 2-8°C for later use.

[0031] d) Activation of fluorescent latex: add 1 ml of latex cross-linking agent to every 10 ml of fluorescent latex, react at room temperature for 1 hour, centrifuge for 15 min, and centrifuge repeatedly 3 times with 0.05 MPBS.

[0032] e) Preparation of ...

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PUM

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Abstract

The invention provides a fluorescent latex immunochromatography detection reagent for detecting falciparum malaria and a preparation method thereof. The fluorescent latex immunochromatography detection reagent comprises a sample mat, a combining mat, a reaction film and a water absorption mat. The combining mat is coated with an anti-HRP-2 monoclonal antibody marked by fluorescent latex and anti-rabbit IgG, a detecting line and a quality control line are arranged on the reaction film, the detecting line is coated with an anti-HRP-2 monoclonal antibody, and the quality control line is coated with rabbit IgG. The fluorescent latex immunochromatography detection reagent for detecting falciparum malaria can fast detect plasmodium falciparum, and is fast to operate, low in cost and suitable for clinical use and field use.

Description

technical field [0001] The invention relates to the field of disease detection, in particular to a fluorescent latex immunochromatographic detection reagent for detecting falciparum malaria and a preparation method thereof. Background technique [0002] Malaria is an acute parasitic disease caused by Plasmodium infection that seriously endangers the health of the population. It is transmitted through the bite of Anopheles mosquitoes. In the human body, it undergoes asexual reproduction in the liver and sexual reproduction in the red blood cells, destroying red blood cells in batches and causing disease. There are four kinds of Plasmodium that parasitize the human body: Plasmodium vivax (P.lasmodium), Plasmodium falciparum (P.falciparum), Plasmodium three days (P.malarial) and ovale Plasmodium (P.ovale). Plasmodium vivax and Plasmodium falciparum are common in my country, and only a few cases of Plasmodium ovale have been found. Malaria diagnosis is an important part of ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N33/68G01N33/577G01N33/569G01N33/558
CPCG01N33/558G01N33/56905G01N33/577G01N33/68G01N2333/445Y02A50/30
Inventor 陈飞康可人王继华
Owner GUANGZHOU WONDFO BIOTECH
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