scholarly journals Comparison of an Improved Polymerase Chain Reaction Protocol and the Indirect Hemagglutination Assay in the Detection of Eperythrozoon Suis Infection

1994 ◽  
Vol 6 (3) ◽  
pp. 321-325 ◽  
Author(s):  
Sharon M. Gwaltney ◽  
Richard D. Oberst
Keyword(s):  
Polymerase Chain Reaction ◽  
Chain Reaction ◽  
Serum Samples ◽  
Specific Primers ◽  
Hemagglutination Assay ◽  
Young Pigs ◽  
Indirect Hemagglutination ◽  
Antibody Titers ◽  
Indirect Hemagglutination Test ◽  
Polymerase Chain

The ability of an improved polymerase chain reaction (PCR) protocol to detect Eperythrozoon suis DNA in the blood of experimentally infected nonsplenectomized pigs was evaluated. The protocol utilizes previously described E. suis-specific primers and a proprietary DNA-releasing reagent in a 2-step amplification cycle followed by visualization of the 492-bp amplification product on agarose gels. This PCR protocol successfully amplified E. suis DNA in blood from all postinfection samples and from the preinfection samples of 2 pigs, indicating preexisting natural infections. Results of the indirect hemagglutination test on serum samples from these pigs revealed that only 1 pig developed detectable antibody titers to E. suis infection during the 43-day study; that pig was determined by PCR to have been infected naturally with E. suis prior to experimental inoculation. These results confirm previous reports of poor antibody response of young pigs to E. suis infection and demonstrate the potential of PCR as a valuable tool for the diagnosis and study of E. suis infection in pigs.

scholarly journals Development of specific primers for the detection of HVA1 from barley in transgenic durum wheat by polymerase chain reaction (PCR) technology

2014 ◽  
Vol 13 (4) ◽  
pp. 581-592 ◽  
Author(s):  
Melloul Marouane ◽  
Iraqi Driss ◽  
M Udupa Sripada ◽  
Abdelaziz El Alaoui My ◽  
Amine Alaoui Sanaa ◽  
...  
Keyword(s):  
Polymerase Chain Reaction ◽  
Durum Wheat ◽  
Chain Reaction ◽  
Specific Primers ◽  
Pcr Technology ◽  
Polymerase Chain

scholarly journals What Is the Predictive Value of a Single Nasopharyngeal SARS-CoV-2 PCR Swab Test in a Patient With COVID-Like Symptoms and/or Significant COVID-19 Exposure?

2020 ◽  
Vol 7 (10) ◽  
Author(s):  
Blessen George ◽  
James McGee ◽  
Eileen Giangrasso ◽  
Sheila Finkelstein ◽  
Susan Wu ◽  
...  
Keyword(s):  
Polymerase Chain Reaction ◽  
Severe Acute Respiratory Syndrome ◽  
Predictive Value ◽  
Hospital Workers ◽  
Chain Reaction ◽  
Pcr Screening ◽  
Test Characteristics ◽  
Antibody Titers ◽  
Polymerase Chain ◽  
Pcr Test

Abstract Utilizing results of polymerase chain reaction (PCR) testing and subsequent antibody titers, we report on the test characteristics of a PCR screening test for severe acute respiratory syndrome coronavirus 2 among hospital workers. The PCR test was found to be 87% sensitive and 97% specific, with a positive predictive value of 0.98 and a negative predictive value of 0.80.

Failure to Detect Measles Virus Rna, by Reverse Transcription-Polymerase Chain Reaction, in Peripheral Blood Leucocytes of Patients with Multiple Sclerosis

1996 ◽  
Vol 1 (4) ◽  
pp. 204-206 ◽  
Author(s):  
B. Brankin ◽  
M. Osman ◽  
L. Herlihy ◽  
S.A. Hawkins ◽  
S.L. Cosby
Keyword(s):  
Multiple Sclerosis ◽  
Polymerase Chain Reaction ◽  
Reverse Transcription ◽  
Peripheral Blood ◽  
Measles Virus ◽  
Chain Reaction ◽  
Specific Primers ◽  
Polymerase Chain ◽  
Multiple Sclerosis Patients ◽  
Peripheral Blood Leucocytes

We have examined peripheral blood leucocytes (PBLs) from 17 multiple sclerosis patients, two patients with rheumatoid arthritis, one case of acute childhood measles and one case of subacute sclerosing panencephalitis, as well as 19 healthy adult controls for measles virus (MV) RNA, by the technique of reverse transcription-polymerase chain reaction. MV nucleocapsid gene specific primers were used to amplify all PBL-derived cDNA samples. These proved to be negative with the exception of the sample derived from the acute measles case. Selected cases were examined further, using fusion gene and matrix gene specific primers. MV RNA could not be detected.

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