Accuracy of the serological test elisa compared to polymerase chain reaction (PCR) for the diagnosis of cytomegalovirus (CMV) infection in pregnancy

2000 ◽  
Vol 70 ◽  
pp. A43-A43
Author(s):  
S.V. Parmigiani ◽  
R. Barini ◽  
S.C.B. Costa ◽  
R. Zaccaria
Keyword(s):  
Polymerase Chain Reaction ◽  
Serological Test ◽  
Cmv Infection ◽  
Chain Reaction ◽  
Test Elisa ◽  
Polymerase Chain ◽  
In Pregnancy

scholarly journals DETEKSI BAKTERI PENYEBAB PENYAKIT TYPHUS PADA MANUSIA DENGAN POLYMERASE CHAIN REACTION

2011 ◽  
Vol 1 (1) ◽  
pp. 45
Author(s):  
Muktiningsih Nurjayadi ◽  
Fera Kurnia Dewi ◽  
Dahlia Dahlia ◽  
S, Restu.N S ◽  
Fitri W
Keyword(s):  
Polymerase Chain Reaction ◽  
Detection Method ◽  
Serological Test ◽  
Research Result ◽  
Salmonella Typhi ◽  
Detection Methods ◽  
Chain Reaction ◽  
Specificity And Sensitivity ◽  
Dna Fragment ◽  
Polymerase Chain

Salmonella typhi is bacteria that cause typhoid disease in humans. In Indonesia, the morbidity number of typhoid disease tends to be increase. Thus, it has been requiring the alternative for handling or preventing that disease. Recently, the detection method commonly uses for S. typhi detection is Serological test. The weakness of this method is often producing less accurate and not specific detection. The previous research was successfully discovered S. typhi gene that codes protein which is contributed at adherents or colonization those bacteria in epithelial human cell. That result was base to develop detection on S. typhi method by Polymerase chain reaction (PCR). The aim of this research is developing a specific and accurate detection method for S. typhi bacteria by PCR. The research result is performed successfully to amplify the fimbrial-C S. typhi gene using pairs of primer FW-INT 2- REV-1A NEW which was designed and synthesized in previous step. That success showed by the finding of the DNA fragment of 0.2 kilobase (kb) proffers to size of DNA fragment which is hopefully in using S. typhi genome as a template. Specificity and sensitivity test for those primers are still conducting to reproducibility results. Base on the results can be concluded that the research have successfully conducted in developing S. typhi detection method using pairs of S. typhi fimbrial-C primer. Hopefully, the studied of developing detection methods was conducted better compare with former detection methods.Keywords: S. typhi detection method, fim-C S. typhi gene, PCRAbstrakSalmonella typhi merupakan bakteri penyebab penyakit tifus pada manusia. Di Indonesia, angka morbiditas penderita penyakit typhus cenderung meningkat, sehingga diperlukan suatu alternatif untuk penanganan atau pencegahan penyakit tersebut. Sampai saat ini metode deteksi S. typhi yang banyak digunakan adalah uji serologi. Kelemahan metode ini adalah sering menghasilkan deteksi yang kurang akurat dan tidak spesifik. Pada penelitian yang dilakukan sebelumnya, telah berhasil ditemukan gen fimbrial-C S. typhi pengkode protein yang berperan dalam penempelan S. typhi pada usus manusia, hasil ini dijadikan landasan untuk pengembangan metode deteksi menggunakan teknik PCR. Tujuan penelitian ini mengembangkan metode deteksi yang akurat dan spesifik untuk bakteri penyebab penyakit typhus pada manusia. Hasil penelitian menunjukkan bahwa telah berhasil dilakukan amplifikasi gen fimbrial-C S. typhi menggunakan pasangan primer hasil perancangan yaitu FW-INT 2- REV-1A NEW. Keberhasilan tersebut ditunjukkan dengan diperolehnya pita DNA berukuran 0.2 kilo basa (kb) sesuai dengan ukuran pita DNA yang diharapkan dengan menggunakan template DNA genom bakteri S. typhi. Uji sensitivitas dan spesifisitas terhadap primer hasil rancangan sedang di kaji lebih lanjut untuk memperoleh reprodusibiltas hasil pengujian. Berdasarkan hasil yang diperoleh dapat disimpulkan bahwa telah berhasil dilakukan pengembangan metode deteksi S. typhi menggunakan pasangan primer fimbrial-C S. typhi. Pengkajian pengembangan metode deteksi yang dihasilkan ini diharapkan dapat lebih baik dibanding beberapa metode deteksi yang sudah ada.Kata Kunci: Metode Deteksi Bakteri typhus, fim-C S. typhi, PCR

scholarly journals COMPARISON OF MOLECULAR AND SEROLOGICAL TESTS FOR SEVERE ACUTE RESPIRATORY SYNDROME CORONAVIRUS 2 (SARS-COV-2) IN POST-EXPOSURE EMPLOYEES OF THE NEPHROLOGY DEPARTMENT

2020 ◽  
Vol 73 (12) ◽  
pp. 2572-2575
Author(s):  
Marlena Kwiatkowska ◽  
Inga Chomicka ◽  
Jolanta Malyszko
Keyword(s):  
Polymerase Chain Reaction ◽  
Real Time ◽  
Serological Test ◽  
Qualitative Assessment ◽  
Nasopharyngeal Swab ◽  
Molecular Testing ◽  
Rt Pcr ◽  
Chain Reaction ◽  
Post Exposure ◽  
Polymerase Chain

Introduction: A novel coronavirus SARS-CoV-2 RNA, detected by reverse-transcription polymerase chain reaction (RT-PCR) was identified as the cause of a cluster of pneumonia cases in Wuhan, China. It rapidly spread, at first in China, then resulting in an epidemic in other countries throughout the world. One of such controversial topics is the issue of diagnostics and interpretation of test for COVID-19. According to Polish and global guidelines, the basis for diagnosis is molecular testing – real-time reverse transcriptasepolymerase chain reaction (RT-PCR). Taking all these data into consideration, the aim of the study was to compare RT-PCR with serological test in our employees post-exposure. According to Polish and global guidelines, the basis for diagnosis is molecular testing, real-time reverse transcriptase-polymerase chain reaction (RT-PCR). The aim: To compare RT-PCR with serological test in our employees post-exposure. Material and methods: 79 employees of the Clinic, 19 men and 60 women in the age range 27-69 years were evaluated. Tests were begun four days after information about the positive test in our „Employee 0” and lasted for 7 days. At first, we made RT-PCR tests on the specimen from nasopharyngeal swab. Then, we accomplished rapid antibodies tests. This test is based on the qualitative assessment of the presence of IgM and IgG antibodies by immunochromatography using a sample of capillary blood from the fingertip. Results: All the tests were negative. No employee developed symptoms during the 7-day follow-up after the end of the tests. Conclusions: As routine tests for patients have been implemented widely, but similar solutions for employees have not gained popularity. Use of personal protective equipment (PPE) e.g. facemask and shields, transparent screens, disposable medical uniforms, minimalization the contact time, increasing distance from both colleagues and patients (if possible), and strictly follow sanitary procedures largely contributed to the absence of illness in the surveyed group of employees.

scholarly journals HEMATOLOGICAL MALIGNANCIES

2015 ◽  
Vol 22 (03) ◽  
pp. 349-352
Author(s):  
Umair Hanif ◽  
Mughees Ahmed ◽  
Imran Hanif
Keyword(s):  
Polymerase Chain Reaction ◽  
Developing Countries ◽  
Hematological Malignancies ◽  
Cmv Infection ◽  
Chain Reaction ◽  
Blood Samples ◽  
Polymerase Chain ◽  
Study Setting ◽  
Written Informed Consent ◽  
Size Marker

Infection rate of CMV in adults is approximately 60% in the developed countriesand almost 100% in the developing countries. Objectives: To evaluate the frequency ofcytomegalovirus (CMV) infection in patients with different hematological malignancies. Design:Observational study. Setting: Gulab Devi Chest Hospital & INMOL Hospital Lahore. Period: Sixmonths. Materials and methods: The blood samples were drawn from the selected patientsafter taking their written informed consent. The DNA was extracted from the whole blood andthe polymerase chain reaction was performed for CMV DNA using CMV PCR kit (CinnagenInc. Catalog # PR7836C). The 222bp fragment corresponding to the size marker and positivecontrol was considered as positive. The data was analyzed by SPSS version 16. Results: Themean age of patients was 36 years. Out of 16, 3 were presented with interstitial pneumonitis, 14with retinitis, 3 with esophagitis and 5 were presented with colitis respectively. In this study onesample was tested positive for CMV DNA. Conclusions: CMV infection may be a serious threatfor the patients with compromised immune system such as those receiving chemotherapy. Thescreening for CMV should be done before the blood transfusion to such patients.

scholarly journals Rapid Serological Assays and SARS-CoV-2 Real-Time Polymerase Chain Reaction Assays for the Detection of SARS-CoV-2: Comparative Study (Preprint)

2020 ◽  
Author(s):  
Angelo Virgilio Paradiso ◽  
Simona De Summa ◽  
Daniela Loconsole ◽  
Vito Procacci ◽  
Anna Sallustio ◽  
...  
Keyword(s):  
Polymerase Chain Reaction ◽  
Nucleic Acid ◽  
Real Time ◽  
Large Scale ◽  
Serological Test ◽  
Immunoglobulin M ◽  
Consecutive Series ◽  
Rt Pcr ◽  
Chain Reaction ◽  
Polymerase Chain

BACKGROUND Real-time polymerase chain reaction (RT-PCR) testing for the identification of viral nucleic acid is the current standard for the diagnosis of SARS-CoV-2 infection, but technical issues limit its utilization for large-scale screening. Serological immunoglobulin M (IgM)/IgG testing has been proposed as a useful tool for detecting SARS-CoV-2 exposure. OBJECTIVE The objective of our study was to compare the results of the rapid serological VivaDiag test for SARS-CoV-2–related IgM/IgG detection with those of the standard RT-PCR laboratory test for identifying SARS-CoV-2 nucleic acid. METHODS We simultaneously performed both serological and molecular tests with a consecutive series of 191 symptomatic patients. The results provided by a new rapid serological colorimetric test for analyzing IgM/IgG expression were compared with those of RT-PCR testing for SARS-CoV-2 detection. RESULTS Of the 191 subjects, 70 (36.6%) tested positive for SARS-CoV-2 based on RT-PCR results, while 34 (17.3%) tested positive based on serological IgM/IgG expression. Additionally, 13 (6.8%) subjects tested positive based on serological test results, but also tested negative based on RT-PCR results. The rapid serological test had a sensitivity of 30% and a specificity of 89% compared to the standard RT-PCR assay. Interestingly, the performance of both assays improved 8 days after symptom appearance. After 10 days had passed since symptom appearance, the predictive value of the rapid serological test was higher than that of the standard molecular assay (proportion of positive results: 40% vs 20%). Multivariate analysis showed that age &gt;58 years <i>(P</i>&lt;.01) and period of &gt;15 days after symptom onset (<i>P</i>&lt;.02) were significant and independent factors associated with serological test positivity. CONCLUSIONS The rapid serological test analyzed in this study seems limited in terms of usefulness when diagnosing SARS-CoV-2 infection. However, it may be useful for providing relevant information on people’s immunoreaction to COVID-19 exposure.

scholarly journals Application of Polymerase Chain Reaction Fingerprinting to Differentiate Ornithobacterium Rhinotracheale Isolates

2007 ◽  
Vol 19 (4) ◽  
pp. 417-420 ◽  
Author(s):  
Anil J. Thachil ◽  
Binu T. Velayudhan ◽  
Vanessa C. Lopes-Berkas ◽  
David A. Halvorson ◽  
Kakambi V. Nagaraja
Keyword(s):  
Polymerase Chain Reaction ◽  
Serological Test ◽  
Random Amplified Polymorphic Dna ◽  
Respiratory Pathogen ◽  
Chain Reaction ◽  
Agar Gel ◽  
Fingerprinting Technique ◽  
Polymerase Chain ◽  
Ornithobacterium Rhinotracheale ◽  
Precipitation Test

Ornithobacterium rhinotracheale (ORT) is an infectious respiratory pathogen of chickens, turkeys, and wild birds. There are 18 serotypes of ORT reported worldwide. In this study, enterobacterial repetitive intergenic consensus (ERIC) polymerase chain reaction and random amplified polymorphic DNA assay with Universal M13 primer-based fingerprinting techniques were investigated for their ability to differentiate ORT isolates. The authors examined 50 field isolates and 8 reference strains of ORT for their genetic differences. The fingerprint patterns were compared with serotyping results of ORT by the agar gel precipitation test. M13 fingerprinting revealed different patterns for 6 reference serotypes of ORT that were tested, namely, C, D, E, I, J, and K. Ornithobacterium rhinotracheale reference serotypes A and F yielded indistinguishable fingerprints with M13 fingerprinting. The ERIC 1R technique discerned only 5 of the 8 reference serotypes of ORT. Distinct fingerprints were also found within the ORT serotypes with both techniques. From 58 isolates of ORT that were fingerprinted belonging to 8 ORT serotypes, 10 different fingerprints were obtained with M13 fingerprinting and 6 different fingerprints were obtained with ERIC 1R fingerprinting. M13 fingerprinting technique was found to be more discriminative in differentiating ORT isolates than the ERIC 1R fingerprinting technique. These results suggest that fingerprinting techniques may be a more discerning tool for characterizing ORT isolates than the serological test using the agar gel precipitation test. This fingerprinting technique could potentially be a valuable tool in identifying an isolate from a clinical outbreak of ORT infection for development of an autogenous vaccine.

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