scholarly journals Investigation of latent infections caused by cyprinid herpesvirus 3 in koi (Cyprinus carpio) in southern China

2017 ◽  
Vol 29 (3) ◽  
pp. 366-369 ◽  
Author(s):  
Shucheng Zheng ◽  
Qing Wang ◽  
Sven M. Bergmann ◽  
Yingying Li ◽  
Weiwei Zeng ◽  
...  
Keyword(s):  
Polymerase Chain Reaction ◽  
Southern China ◽  
Latent Infections ◽  
Peripheral Blood Leukocytes ◽  
Chain Reaction ◽  
Blood Leukocytes ◽  
Nested Polymerase Chain Reaction ◽  
Cyprinid Herpesvirus 3 ◽  
Antibody Elisa ◽  
Polymerase Chain

Although herpesviruses such as cyprinid herpesvirus 3 (CyHV-3) can establish lifelong latent infections, little is known about latency conditions in farmed koi populations in China. We used nested polymerase chain reaction targeting the TK gene and an indirect antibody ELISA to screen asymptomatic fish obtained from southern China for evidence of CyHV-3 infection. CyHV-3 DNA could be detected either in peripheral blood leukocytes or from gills of asymptomatic koi. Most koi sera did not contain anti–CyHV-3 antibodies; however, 5 samples were ELISA positive, providing evidence of prior CyHV-3 infections. These findings suggest that koi may survive CyHV-3 infections and become virus carriers.

Detection of human cytomegalovirus DNA in peripheral blood leukocytes by the polymerase chain reaction

Transfusion ◽  
2003 ◽  
Vol 33 (9) ◽  
pp. 783-784 ◽  
Author(s):  
Ian.S. Bevan ◽  
Matthew R. Walker ◽  
Richard A. Daw ◽  
Andreas Bitsch ◽  
Gregor Bein ◽  
...  
Keyword(s):  
Polymerase Chain Reaction ◽  
Human Cytomegalovirus ◽  
Peripheral Blood ◽  
Peripheral Blood Leukocytes ◽  
Chain Reaction ◽  
Blood Leukocytes ◽  
Polymerase Chain

scholarly journals Peripheral Blood Leukocytes and Serum Nested Polymerase Chain Reaction Are Complementary Methods for Monitoring Active Cytomegalovirus Infection in Transplant Patients

2013 ◽  
Vol 24 (3) ◽  
pp. e69-e74 ◽  
Author(s):  
PD Andrade ◽  
MT Fioravanti ◽  
EBV Anjos ◽  
C De Oliveira ◽  
DM Albuquerque ◽  
...  
Keyword(s):  
Polymerase Chain Reaction ◽  
Positive Predictive Value ◽  
Predictive Value ◽  
Cytomegalovirus Infection ◽  
Clinical Symptoms ◽  
Peripheral Blood Leukocytes ◽  
Active Infection ◽  
Chain Reaction ◽  
Blood Leukocytes ◽  
Polymerase Chain

BACKGROUND: Human cytomegalovirus is an important cause of morbidity and mortality in immunocompromised patients. Qualitative polymerase chain reaction (PCR) has proven to be a sensitive and effective technique in defining active cytomegalovirus infection, in addition to having low cost and being a useful test for situations in which there is no need for quantification. Real-time PCR has the advantage of quantification; however, the high cost of this methodology makes it impractical for routine use.OBJECTIVE: To apply a nested PCR assay to serum (sPCR) and to evaluate its efficiency to diagnose active cytomegalovirus infection compared with PCR of peripheral blood leukocytes (L-PCR).METHODS: Samples of 37 patients were prospectively evaluated. An internal control was created and applied to sPCR to exclude false-negative results.RESULTS: In total, 21 patients (57%) developed active cytomegalovirus infection. After analyzing the two methods for the diagnosis of active infection, higher sensitivity and negative predictive value of the L-PCR versus sPCR (100% versus 62%), and higher specificity and positive predictive value of sPCR versus L-PCR (81% versus 50% and 72%, respectively) were observed. Discordant results were observed in 11 patients who were L-PCR-positive but sPCR-negative for active cytomegalovirus infection, five of whom developed clinical symptoms of cytomegalovirus. Clinical symptoms were observed in 14 patients, 12 of whom were diagnosed with active infection by nested L-PCR (P=0.007) and seven by nested sPCR (P=0.02). Higher specificity and a positive predictive value for sPCR were observed.CONCLUSION: Nested L-PCR and sPCR were considered to be complementary methods for the diagnosis and management of symptomatic cytomegalovirus infection.

scholarly journals Expression of DROSHA and DICER genes in peripheral blood leukocytes in lung sarcoidosis

2018 ◽  
Vol 90 (3) ◽  
pp. 21-24
Author(s):  
I E Malysheva ◽  
O V Balan ◽  
E L Tikhonovich ◽  
T O Volkova
Keyword(s):  
Gene Expression ◽  
Polymerase Chain Reaction ◽  
Real Time ◽  
Peripheral Blood ◽  
Messenger Rna ◽  
Peripheral Blood Leukocytes ◽  
Chain Reaction ◽  
Blood Leukocytes ◽  
Healthy Donors ◽  
Polymerase Chain

Aim. To study the expression level of the genes DROSHA and DICER in peripheral blood leukocytes (PBL) of patients with sarcoidosis of the lungs Materials and methods. The study included 32 patients diagnosed with persistent lung sarcoidosis (mean age 41.56±1.27 years) and 36 healthy donors (control; mean age 42.79±1.95 years). The level of expression of messenger RNA (mRNA) of the genes DROSHA and DICER were determined in PBL of healthy donors and patients with sarcoidosis of the lung by polymerase chain reaction in real time. Results. As a result of the conducted researches it is established that the level of drosha gene expression in PBL patients with sarcoidosis of lungs is significantly reduced in comparison with the control (p

scholarly journals Development of a Specific Polymerase Chain Reaction System for the Detection of Rice Orange Leaf Phytoplasma

Plant Disease ◽  
2020 ◽  
Vol 104 (2) ◽  
pp. 521-526
Author(s):  
Zhiyi Wang ◽  
Yingzhi Zhu ◽  
Zhanbiao Li ◽  
Xin Yang ◽  
Tong Zhang ◽  
...  
Keyword(s):  
Polymerase Chain Reaction ◽  
Nested Pcr ◽  
False Positive ◽  
Southern China ◽  
Reaction System ◽  
Universal Primers ◽  
Chain Reaction ◽  
Nested Polymerase Chain Reaction ◽  
Orange Leaf ◽  
Polymerase Chain

Rice orange leaf disease (ROLD), caused by rice orange leaf phytoplasma (ROLP), is transmitted by leafhopper vectors Recilia dorsalis and Nephotettix cinticeps. ROLD severely devastates rice production in Asia. Accurate detection of the pathogen is important for disease management. Current nested polymerase chain reaction (nested PCR) method using phytoplasma universal primers is widely used to detect phytoplasmas; however, it has shortcoming of inconvenience and inaccuracy, for it needs two round of PCR reactions and could produce false positive results due to nontarget amplification. In this study, we developed a PCR assay using a set of primers designed based on the ROLP genome sequence to amplify house-keeping gene FtsH-1 in rice and leafhopper vector samples. This method is simple and rapid, and its sensitivity up to 10 pg/μl of total ROLP DNA. It also minimizes the false positive problem produced by nested PCR. This method was used to survey the geographic distribution of ROLD in southern China from 2016 to 2018. The results showed that the distribution areas and vector carrying rate of ROLD had gradually increased.

Sign in / Sign up

Export Citation Format

Share Document