Modern Techniques for Pathogen Detection

Dieses herausragende Fachbuch setzt neue Maßstäbe für ein Methodenbuch im Bereich der Pathogenerkennung. Im ersten Kapitel werden aktuelle Standardmethoden vorgestellt, mit Hintergrundinformationen, Stärken und Schwächen der einzelnen Verfahren sowie einem Vergleich mit neuen Methoden. Die nachfolgenden Kapitel beschreiben neue Methoden, die zwar bereits weit verbreitet, für Routineuntersuchungen aber noch nicht ausgereift genug sind. Ein wertvolles Referenzwerk für alle medizinischen Labors und Klinikeinrichtungen, die sich mit Infektionskrankheiten beschäftigen.

Auteur
Jurgen Popp is Professor at the Friedrich-Schiller-University Jena where he is Director of the Institute of Physical Chemistry. He is also Director of the Institute of Physical High Technology (IPHT) Jena. In the German National Research Network on biophotonics he serves as the speaker.

Professor Bauer is the chair of the Integrated Research and Treatment Center for Sepsis at the Friedrich Schiller University Jena. Prof. Bauer graduated from the medical school of the Saarland in 1990 before moving to the Johns Hopkins Hospital for 2 years. Since 2003 he is full professor at the University of Jena.

Texte du rabat

This book gives a comprehensive overview of common and modern techniques for pathogen diagnostics.

The first chapter provides an outline of unmet medical needs in life-threatening infections followed by an overview of routine identification methods currently used, including their background, strengths and weaknesses, as well as a comparison to newer methods. The following chapters then cover novel methods already widelyused and their potential for routine pathogen detection.

An outstanding resource for all medical laboratories and clinical as well as bioanalytical institutions dealing with infectious diseases.

Résumé
This outstanding overview sets a new standard for a methods book on pathogen detection. The first chapter provides an outline of currently used routine methods, including their background, strengths and weaknesses, as well as comparing them to newer methods. The following chapters then cover novel methods already in wide use and which are still more experimental for routine purposes.
An invaluable resource for all medical laboratories and clinical institutions dealing with infectious diseases.

Contenu

Preface XI

List of Contributors XV

1 Unmet Medical Needs in Life-Threatening Infections Caring for the Critically Ill 1
Michael Bauer, Andreas Kortgen, and Mervyn Singer

1.1 LifeThreatening Infections and Sepsis Defining the Problem 1

1.2 Sepsis as a Hidden Healthcare Disaster 3

1.3 Microorganisms and Types of Infection Triggering Sepsis 4

1.4 Emerging Problems Related to Resistance in Bacterial Infections 5

1.5 The Role of Fungi and Viruses 5

1.6 The Need for New Approaches in Diagnostics of Life-Threatening Infection and Sepsis 7

1.7 Rapid and Sensitive Culture-Independent Strategies to Identify Blood Stream Infection 8

1.8 Beyond Infection Profiling the Immune Response of the Septic Host 10

1.9 Host Factors Contributing to Pathogenesis of Sepsis 11

References 13

2 Identification Methods An Overview 19
Oliwia Makarewicz, Claudia Stein,Wolfgang Pfister, Bettina Löffler, and Mathias Pletz

2.1 Taxonomy of Pathogenic Organisms 19

2.2 Microscopic Methods 20

2.2.1 Stains 20

2.2.2 Autofluorescence 29

2.2.3 Immunofluorescence 30

2.2.4 In Situ Hybridization 30

2.2.5 Dark-Field Microscopy 31

2.3 Culture-Based Methods 31

2.3.1 Blood Culture 32

2.3.2 Automated Differentiation Systems 33

2.3.3 API System 35

2.3.4 Selective Agar 36

2.3.5 Susceptibility Testing 37

2.3.6 Other Methods 38

2.4 Nucleic Acid-Based Techniques 38

2.4.1 PCR 39

2.4.1.1 Real-Time PCR 39

2.4.1.2 Multiplex-PCR 40

2.4.1.3 RAPD and rep-PCR 40

2.4.1.4 Microarrays 40

2.4.1.5 RFLP 41

2.4.2 Sequencing 41

2.4.2.1 Ribosomal RNA Genes 41

2.4.2.2 MLST 42

2.4.2.3 NG Sequencing 42

2.5 Serology 42

2.5.1 AntigenAntibody-BasedMethods 44

2.5.1.1 Agglutination 44

2.5.1.2 Immunodiffusion 45

2.5.1.3 Quantitative Immunoassays 45

2.5.2 Automated Immunoassays 46

2.5.3 Applications of Serological Test 47

2.5.3.1 Types of Human Antibodies and What They Indicate? 47

2.5.3.2 Validity of Antibodies against Opportunistic Species 47

2.5.3.3 Specificity of Fungal Antigens 48

2.5.3.4 Specific Urine Antigen Tests 48

2.5.4 Biomarkers 48

2.6 Conclusions and Perspectives 49

References 50

3 Nucleic Acid Amplification Techniques 55
Marc Lehmann and Roland P.H. Schmitz

3.1 Introduction 55

3.2 The Basic PCR Protocol 56

3.3 Primer Design 60

3.3.1 Specific versus Broad-Range Primers and the Fate of False Targeting 63

3.4 Modified End-Point PCR Protocols 66

3.5 Non-PCR NAT: Isothermal Amplification Protocols 70

3.6 Quantitative PCR 73

3.6.1 Quantification in qPCR 77

3.6.2 Melting Curve Analysis (MCA) 78

3.7 Controls, Probing, and General Aspects of Result Interpretation 78

3.7.1 Strategies in Amplicon Verification 80

3.7.1.1 (DNA) Microarray 80

3.7.1.2 Flow Cytometry 81

3.7.1.3 Mass Spectrometry 81

3.7.2 PCR Inhibitors 82

3.8 Preanalytics 83

3.8.1 Sample Volume 83

3.8.2 Cell Lysis 84

3.8.3 Nucleic Acid Isolation and Preparation 85

3.9 Fields of PCR Application 86

3.9.1 Sequencing 86

3.9.1.1 Pyrosequencing 87

3.9.2 Typing and Epidemiology 88

3.9.3 Pathogen Detection in Complex Clinical Samples 89

3.9.4 General Aspects of Result Interpretation 90

3.9.4.1 Sensitivity and Specificity 90

3.9.4.2 NAT versus Culture 92

3.9.4.3 The Fate of Antibiotic Resistances Detection 93

3.10 Microbial Trace Detection in BSI, Ascites, and Synovial Fluids 94 3.10.1 Grown Blood Culture Media as Samp...