Application of NGS Technique in Precise Diagnosis of Infectious Diseases

Study Overview
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Brief Summary
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Infectious disease leads to deaths that accounted for more than 25% of all causes of human mortality. But the traditional microbiological diagnostic methods such as specimen culture are sometimes time-consuming, and have limited sensitivity. And some bacteria, anaerobes and viruses may be difficult to cultivate and isolation. Therefore, the accurate identification and rapid classification of pathogenic microorganisms is very important for the patient's precise diagnosis and timely treatment. Small-scale studies on the diagnostic efficacy and prognosis of infection in the next generation have been shown to provide early diagnosis and targeted medication guidance for bloodstream infections and respiratory infections, but the larger-scale validation of next-generation sequencing Technology in the diagnosis and treatment of infectious diseases in the human body is relatively rare. The purpose of this study is to provide rapid etiological diagnosis of patients by means of next-generation sequencing, to change the way of treatment of patients under the existing traditional pathogen detection by means of accurate description of pathogens and monitoring their dynamic changes, and to provide patients with more accurate treatment.

Official Title
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Application of Next Generation Sequencing Technique in Precise Diagnosis of Infectious Diseases

Conditions
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Next Generation Sequencing, Infectious Disease

Intervention / Treatment
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* Diagnostic Test: Next-generation sequencing


Participation Criteria
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Eligibility Criteria
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Inclusion Criteria: Patients are highly suspected of fever of unknown origin Patients are highly suspected of bloodstream infection Patients are highly suspected of respiratory infections Patients are highly suspected of central nervous system infection Exclusion Criteria: Patients diagnosed as non-infectious diseases such as cancer and autoimmune diseases;

Ages Eligible for Study
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Minimum Age: 18 Years

Sexes Eligible for Study
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All

Accepts Healthy Volunteers
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No

Study Plan
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How is the study designed?
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Arms and Interventions

| Intervention/Treatment |
| --- |
|Diagnostic Test: Next-generation sequencing|To provide rapid etiological diagnosis of patients by means of next-generation sequencing.|

What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Diagnostic value (sensitivity and sensibility, positive/negative predictive value) of next-generation sequencing in the pathogen detection of infectious diseases | We aim to collect samples from patients with fever, bacteremia and bloodstream infections, respiratory infections, central nervous system infections, and abscesses, including blood, cerebrospinal fluid, serous effusion, pus, sputum, alveolar lavage fluid, throat swab. Next-generation sequencing will be performed on the collected samples. Our analysis of the sequencing results will focus on the analysis and identification of pathogen genes and will compare the diagnostic performance of next-generation sequencing with conventional etiological diagnostic methods. We anticipate that next-generation sequencing in infectious patients will show a greater diagnostic value than the traditional methods (including culture, special pathogen serology, PCR detection of nucleic acids, etc.). | 3 years | 

Secondary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Diagnostic value (sensitivity and sensibility, positive/negative predictive value) of traditional methods in the pathogen detection of infectious diseases | We aim to collect samples from patients with fever, bacteremia and bloodstream infections, respiratory infections, central nervous system infections, and abscesses, including blood, cerebrospinal fluid, serous effusion, pus, sputum, alveolar lavage fluid, throat swab. Traditional methods including culture, special pathogen serology, PCR detection of nucleic acids, etc, will be performed on the collected samples. Our analysis aims to study the diagnostic power of the traditional diagnostic methods in infectious diseases. | 3 years |