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A kind of test kit for Staphylococcus wauserii detection

A technology of Staphylococcus wornerii and a kit, which is applied in the field of kits for the detection of Staphylococcus wornerii, can solve the problems of high cost, delay in disease treatment, lack of specific primers, etc., and achieves high specificity and low equipment requirements. Effect

Inactive Publication Date: 2020-11-06
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The traditional detection method is to carry out bacterial culture or combined PCR sequencing, but bacterial culture takes 5-7 days, and PCR often cannot distinguish Staphylococcus wausii from other staphylococci due to the lack of specific primers, so joint generation sequencing is required Can only be identified, the cost is high, and it takes several days to get the result
During this period, clinicians can only use medicines based on experience because they have not obtained test results, which often leads to delays in disease treatment

Method used

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  • A kind of test kit for Staphylococcus wauserii detection
  • A kind of test kit for Staphylococcus wauserii detection
  • A kind of test kit for Staphylococcus wauserii detection

Examples

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Effect test

Embodiment 1

[0016] Embodiment 1: Staphylococcus rpoB gene sequence alignment

[0017] Such as figure 1 As shown, in the rpoB gene sequence of Staphylococcus wattlerii, the 5' end of the guide RNA sequence (selected part) of the present invention is the PAM structure of TTTN. The guide RNA sequence does not have a completely consistent sequence among Staphylococcus aureus, Staphylococcus human, Staphylococcus epidermidis, Staphylococcus capitum, and Staphylococcus hemolyticus, and all have several base differences. Moreover, there is no PAM structure of TTTN at the 5' end of the homologous sequence in Staphylococcus aureus, Staphylococcus human, Staphylococcus epidermidis, Staphylococcus capitum, and Staphylococcus hemolyticus. Therefore, the Cas12a protein cannot be targeted by using this guide RNA. To Staphylococcus aureus, Staphylococcus hominis, Staphylococcus epidermidis, Staphylococcus capitis, Staphylococcus hemolyticus, therefore, only Staphylococcus worsii can show a positive rea...

Embodiment 2

[0018] Embodiment 2: The guide RNA specificity determination of the present invention, the steps are as follows:

[0019] (1) Prepare standard strains of Staphylococcus worthii, Staphylococcus aureus, Staphylococcus hominis, Staphylococcus epidermidis, Staphylococcus capitis, Staphylococcus hemolyticus;

[0020] (2) Take 1ml of the sample to be tested, heat it at 98 degrees Celsius for 5min, and draw 1μl as the test sample;

[0021] (3) Prepare the reaction system, the reaction system is 25 μl, including 1 μl detection sample, 14.75 μl hydrated TwistAmpbasic kit reaction drying ball (TwistDx company), 0.9 μl 10mM RPA-F (sequence is SEQ No.2) and RPA-R ( Sequence is SEQ No.3), 0.375 μ l Ribonuclease Inhibitor (Takara Company), 3.5 μ l buffer2.1 (NEB Company), 1000 nM guide RNA (sequence is SEQ No.1), 250 nM Cas12a (NEB Company), 200 nM single-stranded DNA Probe (Shanghai Sangong), add water to make up to 25μl;

[0022] (4) React at a constant temperature of 37 degrees Celsius...

Embodiment 3

[0025] Embodiment 3: the detection method based on guide RNA described in the present invention and traditional PCR method specificity and experimental time-consuming comparison

[0026] 1. based on the detection method of guide RNA described in the present invention, the steps are as follows:

[0027] (1) Prepare standard strains of Staphylococcus worthii, Staphylococcus aureus, Staphylococcus hominis, Staphylococcus epidermidis, Staphylococcus capitis, Staphylococcus hemolyticus;

[0028] (2) Take 1ml of the sample to be tested, heat it at 98 degrees Celsius for 5min, and draw 1μl as the test sample;

[0029] (3) Prepare the reaction system, the reaction system is 25 μl, including 1 μl detection sample, 14.75 μl hydrated TwistAmpbasic kit reaction drying ball (TwistDx company), 0.9 μl 10mM RPA-F (sequence is SEQ No.2) and RPA-R ( Sequence is SEQ No.3), 0.375 μ l Ribonuclease Inhibitor (Takara Company), 3.5 μ l buffer2.1 (NEB Company), 1000 nM guide RNA (sequence is SEQ No.1...

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Abstract

The present invention provides a kit for detecting staphylococcus warneri. The kit comprises a guide RNA specifically targeting a staphylococcus warneri rpoB gene, an amplification primer pair, hydration TwistAmp basic kit reaction drying spheres, LbCas12a protein, a single-stranded DNA probe (ssDNA), an ribonuclease inhibitor and a buffer solution. The kit is used for detecting the staphylococcuswarneri and high in detection specificity, and can separate the staphylococcus warneri from other staphylococci, including staphylococcus aureus, staphylococcus hominis, staphylococcus epidermidis, staphylococcus capitis and staphylococcus haemolyticus. At the same time, the use of the RNA sequence for the detection takes about 1 hour, does not require a PCR instrument, has low requirements on equipment, and is significantly lower than a conventional bacterial culture method or a PCR sequencing method and large in clinical practical value.

Description

technical field [0001] The invention belongs to the field of detection of pathogenic bacteria, and relates to a kit for the detection of Staphylococcus worbachii, comprising a guide RNA specifically targeting the rpoB gene of Staphylococcus worbachii, a pair of RPA amplification primers, and a hydrated TwistAmp basickit Reaction dry balls, LbCas12a protein, single-stranded DNA probe (ssDNA), Ribonuclease Inhibitor, and buffer. This kit can be used for rapid detection of Staphylococcus wausii. Background technique [0002] Staphylococcus worthii is a common bacterial group among Gram-positive bacteria that infects human beings, which brings a huge burden to patients and society. The traditional detection method is to carry out bacterial culture or combined PCR sequencing, but bacterial culture takes 5-7 days, and PCR often cannot distinguish Staphylococcus wordii from other staphylococci due to the lack of specific primers, so joint generation sequencing is required It can ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C12Q1/689C12Q1/04C12N15/11C12R1/44
CPCC12Q1/689
Inventor 孙泽玮陈文静郑良荣
Owner ZHEJIANG UNIV
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