A Real-Time PCR Assay for the Separation of Autographa gamma (Noctuidae: Plusiinae) From Morphologically Similar Species in North America

2017 ◽  
Vol 110 (6) ◽  
pp. 2609-2617 ◽  
Author(s):  
Luke R Tembrock ◽  
Roxanne E Farris ◽  
Lisa Ledezma ◽  
Norman B Barr ◽  
Todd M Gilligan
Keyword(s):  
North America ◽  
Real Time ◽  
Real Time Pcr ◽  
Similar Species ◽  
Pcr Assay ◽  
Autographa Gamma

scholarly journals Development of a duplex real-time PCR assay for the differentiation of Blastomyces dermatitidis and B. gilchristii and a retrospective study of blastomycosis in New York (2005-2019)

2020 ◽  
Author(s):  
Mitchell Kaplan ◽  
YanChun Zhu ◽  
Julianne V Kus ◽  
Lisa McTaggart ◽  
Vishnu Chaturvedi ◽  
...  
Keyword(s):  
New York ◽  
Retrospective Study ◽  
North America ◽  
Real Time ◽  
Real Time Pcr ◽  
Blastomyces Dermatitidis ◽  
Pcr Assay ◽  
Rare Finding ◽  
Clinical Specimens ◽  
Highly Sensitive

Blastomycosis due to Blastomyces dermatitidis and B. gilchristii is a notable cause of respiratory mycoses in North America with recurrent outbreaks. We developed a highly sensitive, specific, and reproducible Taqman duplex real-time PCR assay for the differentiation of B. dermatitidis and B. gilchristii. The new assay permitted retrospective analysis of Blastomyces cultures (2005 to 2019), and primary clinical specimens (2013-2019) from NY patients. Blastomyces dermatitidis was the causal agent for the majority of 38 cases while B. gilchristii was implicated in five cases; a rare finding reported from New York. The duplex real-time PCR assay will be useful for further understanding of ecology and epidemiology of blastomycosis caused by B. dermatitidis and B. gilchristii.

A real-time PCR assay for differentiating pathogenic Anaplasma phagocytophilum from an apathogenic, woodrat-adapted genospecies from North America

2015 ◽  
Vol 6 (6) ◽  
pp. 774-778 ◽  
Author(s):  
Nicole Stephenson ◽  
Emir Hodzic ◽  
Samantha Mapes ◽  
Daniel Rejmanek ◽  
Janet Foley
Keyword(s):  
North America ◽  
Real Time ◽  
Real Time Pcr ◽  
Anaplasma Phagocytophilum ◽  
Pcr Assay

scholarly journals A misleading false-negative result of Pneumocystis real-time PCR assay due to a rare punctual mutation: A French multicenter study

2016 ◽  
Vol 55 (2) ◽  
pp. 180-184 ◽  
Author(s):  
Solène Le Gal ◽  
Florence Robert-Gangneux ◽  
Yann Pépino ◽  
Sorya Belaz ◽  
Céline Damiani ◽  
...  
Keyword(s):  
Real Time ◽  
Multicenter Study ◽  
Real Time Pcr ◽  
False Negative ◽  
False Negative Result ◽  
Pcr Assay

scholarly journals Differing Effects of Standard and Harsh Nucleic Acid Extraction Procedures on Diagnostic Helminth Real-Time PCRs Applied to Human Stool Samples

Pathogens ◽  
2021 ◽  
Vol 10 (2) ◽  
pp. 188
Author(s):  
Tanja Hoffmann ◽  
Andreas Hahn ◽  
Jaco J. Verweij ◽  
Gérard Leboulle ◽  
Olfert Landt ◽  
...  
Keyword(s):  
Nucleic Acid ◽  
Real Time ◽  
Real Time Pcr ◽  
Acid Extraction ◽  
Nucleic Acid Extraction ◽  
Pcr Assay ◽  
Bead Beating ◽  
Stool Samples ◽  
Pcr Assays ◽  
Human Stool

This study aimed to assess standard and harsher nucleic acid extraction schemes for diagnostic helminth real-time PCR approaches from stool samples. A standard procedure for nucleic acid extraction from stool and a procedure including bead-beating as well as proteinase K digestion were compared with group-, genus-, and species-specific real-time PCR assays targeting helminths and nonhelminth pathogens in human stool samples. From 25 different in-house and commercial helminth real-time PCR assays applied to 77 stool samples comprising 67 historic samples and 10 external quality assessment scheme samples positively tested for helminths, higher numbers of positive test results were observed after bead-beating-based nucleic acid extraction for 5/25 (20%) real-time PCR assays irrespective of specificity issues. Lower cycle threshold values were observed for one real-time PCR assay after the standard extraction scheme, and for four assays after the bead-beating-based scheme. Agreement between real-time PCR results after both nucleic acid extraction strategies according to Cohen’s kappa ranged from poor to almost perfect for the different assays. Varying agreement was observed in eight nonhelminth real-time PCR assays applied to 67 historic stool samples. The study indicates highly variable effects of harsh nucleic acid extraction approaches depending on the real-time PCR assay used.

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