Pathogenic Bordetella Rapid Detection

NCT ID: NCT04535505

Last Updated: 2022-09-14

Basic Information

• Recruitment Status: WITHDRAWN
• Study Classification: OBSERVATIONAL
• Study Start Date: 2022-07-31
• Study Completion Date: 2022-12-31

Brief Summary

A CPA platform based on the CRISPR technology is going to established to achieve the goal of detecting pathogenic bordetella and drug resistance genes in one step. The accuracy of this platform will be checked through prospective diagnostic test evaluation methods. Bordetella pertussis isolation culture and identification would be set as a gold standard method.

Detailed Description

Pertussis is an acute respiratory infectious disease caused by bordetella pertussis. Although it is a vaccine-preventable disease, outbreaks and epidemic cases of whooping cough worldwide have been reported from time to time. Bordella parapertussis, Bodella bronchiseptica, and bordetella hosei can cause pertussis-like diseases with symptoms similar to those of whooping cough. The clinical manifestations are difficult to distinguish, and they are easily reported as cases of whooping cough through the infectious disease network.

The diagnosis of the infectious diseases caused by the four pathogenic bodella mainly relies on laboratory pathogenic testing. At present, the laboratory tests of bordetella that can be carried out in the clinical microbiology laboratory include culture, bordetella pertussis specific antibody (PT-IgG) serological detection, and bordetella pertussis nucleic acid PCR detection. However, none of them meet the requirements of early diagnosis.

Cross primer constant temperature amplification (CPA) is nucleic acid constant temperature amplification technology with independent property rights. The fully automated nucleic acid detection platform equipped with CPA technology would make the detection of four pathogenic bordetella easy, quick and safe and accurate.

As pathogenic bodella is difficult to cultivate and there is no standard for drug susceptibility test. Studies have shown that 57.4% of the isolated clinical isolates of bordetella pertussis have MIC value for erthomycin ≥256 μg/mL , and 23s rRNA 2047 site adenine (A) were mutated to guanine (G).CRISPR/Cas is an immune system in bacteria that can specifically recognize invading nucleic acids and shear them. The CRISPR technology developed based on the CRISPR/Cas principle can detect single point mutations in genes.

The hypothesis that 4 pathogenic bordetella and their erythromycin resistance would be detected in one testing platform simultaneously. The accuracy, reliability, predictive value of this platform would be checked through prospective diagnostic test evaluation methods. Bordetella pertussis isolation culture and identification would be as the gold standard method.

Conditions

Pertussis

Study Design

• Observational Model Type: OTHER
• Study Time Perspective: PROSPECTIVE

Study Groups

pertussis test population

People with clinical diagnosis of suspected pertussis in outpatient and ward in the Children's Hospital of Fudan University will be collected as study subjects. Their nasopharyngeal swabs will be collected. Bordetella isolation culture and identification method is the gold standard, and the new CPA platform based on CRISPR technology is the method to be tested. Diagnostic values of this research platform would be detected.

Detection pathogenic pertussis by cross primer constant temperature amplification (CPA) and drug resistant genes of erythromycin by CRISPR technology

Intervention Type: DIAGNOSTIC_TEST

This is an observational study and there are no interventions. The purpose of the study is to compare the accuracy （including sensitivity and specificity）of the new CPA platform based on CRISPR technology detection method and the gold standard in detecting pertussis patients.

Interventions

Detection pathogenic pertussis by cross primer constant temperature amplification (CPA) and drug resistant genes of erythromycin by CRISPR technology

This is an observational study and there are no interventions. The purpose of the study is to compare the accuracy （including sensitivity and specificity）of the new CPA platform based on CRISPR technology detection method and the gold standard in detecting pertussis patients.

Intervention Type: DIAGNOSTIC_TEST

Eligibility Criteria

Inclusion Criteria

• Patients with continuous cough (paroxysmal cough) for more than 1 week, peripheral white blood cell 18×109/L (infants and young children), or> 15×109/L (children), ineffective use of cephalosporin antibacterial drugs，and these patients whose nasopharyngeal swabs are collected for routine bordetella culture identification and drug susceptibility testing would be included as research object.

Exclusion Criteria

• Patients with pertussis are suspected clinically but no nasopharyngeal swab specimens are collected or patients with pertussis are clinically excluded.

• Maximum Eligible Age: 18 Years
• Eligible Sex: ALL
• Accepts Healthy Volunteers: No

Sponsors

Children's Hospital of Fudan University

OTHER

Sponsor Role: lead

Responsible Party

Responsibility Role: SPONSOR

Principal Investigators

Chuanqing Wang, Phd

Role: STUDY_DIRECTOR

Children's Hospital of Fudan University

Locations

Children's Hospital of Fudan University

Shanghai, Shanghai Municipality, China

Countries

China

Other Identifiers

BRD1.0

Identifier Type: -

Identifier Source: org_study_id