Diagnostik der Sepsis – Teil 2: Erregeridentifikation

2019 ◽  
Vol 54 (01) ◽  
pp. 38-48 ◽  
Author(s):  
Daniel Richter ◽  
Alexandra Heininger ◽  
Karsten Schmidt ◽  
Thomas Schmoch ◽  
Michael Bernhard ◽  
...  
Keyword(s):  
Polymerase Chain Reaction ◽  
Next Generation Sequencing ◽  
Next Generation ◽  
Chain Reaction ◽  
Antimikrobielle Therapie ◽  
Polymerase Chain ◽  
Next Generation Sequencing Ngs ◽  
Generation Sequencing ◽  
Kritisch Kranker

ZusammenfassungIm Rahmen der Sepsis und des septischen Schocks spielen, trotz der zunehmenden Verbreitung von neuen molekularbiologischen Verfahren, der kulturelle Erregernachweis und die Resistenztestung weiterhin die entscheidende Rolle in der antimikrobiellen Therapie auf der Intensivstation. Hierbei kann der Erregernachweis für die antimikrobielle Therapie einerseits direkt aus dem Patientenblut, andererseits aber auch aus diversen anderen Probenmaterialien (respiratorische Sekrete, Punktat, intraoperative Abstriche etc.) geführt werden. Ein Nachteil konventioneller kultureller Verfahren im Kontext kritisch kranker Patienten ist die zeitliche Latenz bis zum Erregernachweis bzw. zum Ergebnis der Resistenztestung. Molekularbiologische Verfahren wie Techniken der Erregerdiagnostik und Resistenztestung, die auf Polymerase Chain Reaction (PCR) oder vor allem Next-Generation Sequencing (NGS) basieren, versprechen hier zwar kürzere Umlaufzeiten, sind aber aktuell noch kein klinischer Standard. Trotzdem besitzen diese Verfahren das Potenzial, einen Paradigmenwechsel in der Erregerdiagnostik herbeizuführen.

Next-generation sequencing ofHLA-Gbased on long-range polymerase chain reaction

HLA ◽  
2018 ◽  
Vol 92 (3) ◽  
pp. 144-153 ◽  
Author(s):  
L. L. Nilsson ◽  
T. Funck ◽  
N. D. Kjersgaard ◽  
T. V. F. Hviid
Keyword(s):  
Polymerase Chain Reaction ◽  
Next Generation Sequencing ◽  
Long Range ◽  
Next Generation ◽  
Chain Reaction ◽  
Polymerase Chain ◽  
Generation Sequencing

scholarly journals Discovery of Negative-Sense RNA Viruses in Trees Infected with Apple Rubbery Wood Disease by Next-Generation Sequencing

Plant Disease ◽  
2018 ◽  
Vol 102 (7) ◽  
pp. 1254-1263 ◽  
Author(s):  
Michael E. Rott ◽  
Prasad Kesanakurti ◽  
Constanze Berwarth ◽  
Heidi Rast ◽  
Ian Boyes ◽  
...  
Keyword(s):  
Next Generation Sequencing ◽  
New Genus ◽  
Fruit Trees ◽  
Next Generation ◽  
Chain Reaction ◽  
The Family ◽  
Polymerase Chain ◽  
Next Generation Sequencing Ngs ◽  
Negative Sense ◽  
Generation Sequencing

Apple rubbery wood is a disease of apple found around the world, often associated with Apple flat limb disease, and regulated in many countries. Despite its long history in apple cultivation, the disease’s causal agent has remained elusive. In this study, next-generation sequencing (NGS) was used to identify and characterize several related novel viral agents from apple rubbery wood-infected plants, which have been named Apple rubbery wood virus (ARWV) 1 and 2. Additional specimens with apple rubbery wood disease tested positive by polymerase chain reaction with primers designed to ARWV 1 and 2 genomic RNA segments. In an NGS-based screening of over 100 Malus and 100 Prunus specimens from a collection of virus-infected trees, only one Malus specimen was found to be infected with ARWV not known to be infected with the disease, which strongly suggests that ARWV is not commonly found in Malus spp. or other fruit trees. The two viruses are most closely related to members of the order Bunyavirales. Three RNA segments (large, medium, and small) were characterized and the viruses likely represent a new genus under the family Phenuiviridae, with a suggested name of Rubodvirus (Rubbery wood virus).

scholarly journals Concordance analysis of microsatellite instability status between polymerase chain reaction based testing and next generation sequencing for solid tumors

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Keitaro Shimozaki ◽  
Hideyuki Hayashi ◽  
Shigeki Tanishima ◽  
Sara Horie ◽  
Akihiko Chida ◽  
...  
Keyword(s):  
Pancreatic Cancer ◽  
Polymerase Chain Reaction ◽  
Next Generation Sequencing ◽  
Microsatellite Instability ◽  
Solid Tumors ◽  
Next Generation ◽  
Chain Reaction ◽  
Predictive Values ◽  
Polymerase Chain ◽  
Generation Sequencing

AbstractVarious malignancies exhibit high microsatellite instability (MSI-H) or mismatch repair deficiency (dMMR). The MSI-IVD kit, a polymerase chain reaction (PCR)-based method, was the first tumor-agnostic companion diagnostic to detect MSI status in MSI-H solid tumors. Recently, next-generation sequencing (NGS), which can also detect MSI-H/dMMR, has been made clinically available; however, its real-world concordance with PCR-based testing of MSI-H/dMMR remains to be investigated. The co-primary end points included the positive and negative predictive values of MSI-H/dMMR. A retrospective analysis of 80 patients who had undergone both MSI testing and NGS between July 2015 and March 2021 was conducted. Five patients were confirmed to have MSI-H in both examinations. Among the 75 patients diagnosed as microsatellite stable (MSS) by PCR-based testing, one with pancreatic cancer was diagnosed as having MSI-H after NGS. One patient with pancreatic cancer was diagnosed as having MSS in both tests was found to have a mutation in MLH1 by NGS, which was confirmed as dMMR by IHC staining. NGS had positive and negative predictive values of 100% (5/5) and 98.7% (74/75), respectively, for MSI-H. The concordance between NGS and PCR-based testing was 98.8% (79/80). Thus, NGS can be useful for evaluating MSI/MMR status in clinical practice and can be an important alternative method for detecting MSI-H/dMMR in the future.

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