Abstract:
:The branched DNA (bDNA) assay for hepatitis B virus (Chiron Corporation Emerville, USA) was investigated by application to HBV-infected patients in Taiwan, where the B and C genotypes of hepatitis B virus are most prevalent. The study group included sera with hepatitis B surface antigen (HBsAg) and e antigen (HBeAg); Group 1 (n=70) without treatment; Group 2 (n=28) lamivudine treatment less than 3 months; Group 3 (n=73) lamivudine treatment 3-12 months; Group 4 (n=45) HBeAg-negative sera after 1 year treatment with lamivudine; control group (n=36) HBsAg-negative sera. Comparison of identical-sample results showed a significantly higher coefficient of variation for low-level HBV DNA (<100 MEq/ml) than for high-level (> or =100 MEq/ml), indicating increasing assay inaccuracy uncertainty as the sample HBV DNA concentration decreased. It is thus concluded that low-titered sera should receive special careful pipetting and processing. It was also found that using the relative luminescence of the negative control plus two standard deviations (S.D.) as a new cutoff could promote sensitivity (97.1-->97.1%, 89.3-->100%, 76.7-->84.9%, and 17.8-->22.2% in Groups 1-4, respectively) and specificity (94.4-->97.2%). In summary, the bDNA HBV assay showed only moderate assay performance for samples with low HBV DNA levels. This problem can be improved partially by choosing a new cutoff value based on the relative luminescence of the negative controls in the kit.
journal_name
J Virol Methodsjournal_title
Journal of virological methodsauthors
Jen CM,Young KC,Cheng PN,Kao AW,Chang TTdoi
10.1016/s0166-0934(01)00335-4subject
Has Abstractpub_date
2001-08-01 00:00:00pages
203-10issue
2eissn
0166-0934issn
1879-0984pii
S0166-0934(01)00335-4journal_volume
96pub_type
杂志文章abstract::The introduction of molecular diagnostic methods for investigation of gastroenteritis has significantly reduced the diagnostic gap. However, approximately 25% of cases of gastroenteritis remain undiagnosed even after screening for bacteria, parasites and viruses using the most sensitive PCR and RT-PCR methods availabl...
journal_title:Journal of virological methods
pub_type: 杂志文章
doi:10.1016/j.jviromet.2009.01.006
更新日期:2009-06-01 00:00:00
abstract::Laboratory analysis of blood specimens is an increasingly important tool for rapid diagnosis and control of therapy. So, miniaturization of test systems is needed, but reduced specimens might impair test quality. For rapid detection and quantitation of HBV DNA, the COBAS(®) AmpliPrep/COBAS(®) TaqMan(®) HBV test has pr...
journal_title:Journal of virological methods
pub_type: 杂志文章
doi:10.1016/j.jviromet.2010.07.025
更新日期:2010-11-01 00:00:00
abstract::The serological diagnosis of primary postnatal rubella infection is based on detection of rubella-virus-specific IgM antibody or a four-fold rise in rubella-specific IgG antibody. Although there are several different methods of enzyme immunoassays that are commercially available, the cost benefit evaluation makes them...
journal_title:Journal of virological methods
pub_type: 杂志文章
doi:10.1016/0166-0934(91)90119-k
更新日期:1991-09-01 00:00:00
abstract::Serologic diagnosis of human respiratory syncytial virus (hRSV) and human metapneumovirus (hMPV) infections has been shown to complement virus detection methods in epidemiologic studies. Enzyme immunoassays (EIAs) using cultured virus lysate antigens are often used to diagnose infection by demonstration of a ≥4-fold r...
journal_title:Journal of virological methods
pub_type: 杂志文章
doi:10.1016/j.jviromet.2014.05.008
更新日期:2014-09-01 00:00:00
abstract::A rapid and sensitive method for detecting HIV-1 DNA sequences amplified by polymerase chain reaction (PCR) is described. The method uses solution phase hybridization for rapid and efficient annealing between digoxigenin-labeled targets and biotinylated capture probes. Hybrids containing biotin are captured onto strep...
journal_title:Journal of virological methods
pub_type: 杂志文章
doi:10.1016/0166-0934(92)90174-c
更新日期:1992-07-01 00:00:00
abstract::Although hepatitis C virus (HCV) is a pathogen of global significance, experimental therapies in current clinical development include highly efficacious all-oral combinations of HCV direct-acting antivirals (DAAs). If approved for use, these new treatment regimens will impact dramatically upon our capacity to eradicat...
journal_title:Journal of virological methods
pub_type: 杂志文章
doi:10.1016/j.jviromet.2013.09.017
更新日期:2014-01-01 00:00:00
abstract::HIV antigen capture assay (ELISA) and reverse transcriptase assay were compared for the detection of HIV. Purified virus and the supernatant of infected cells were used for this study. Antigen capture assay was found to be at least one hundred times more sensitive than the RT assay, and for a large number of samples e...
journal_title:Journal of virological methods
pub_type: 杂志文章
doi:10.1016/0166-0934(88)90044-4
更新日期:1988-05-01 00:00:00
abstract::The propagation of Taura syndrome virus (TSV) in primary hemocyte culture of Pacific white shrimp (Penaeus vannamei) was investigated. Purified TSV was inoculated into a 24 h old primary hemocyte culture and the development of cytopathic effects was monitored. The cell morphology started changing within 6 h post-inocu...
journal_title:Journal of virological methods
pub_type: 杂志文章
doi:10.1016/j.jviromet.2010.12.020
更新日期:2011-03-01 00:00:00
abstract::Human cytomegalovirus (HCMV) DNA can be detected in different compartments of human milk. A protocol for the preparation of milk whey free of fat and cells for the detection of human cytomegalovirus (HCMV) by nested PCR is presented. This is based upon the experience of the separation of more than 200 milk specimens o...
journal_title:Journal of virological methods
pub_type: 杂志文章
doi:10.1016/s0166-0934(97)00179-1
更新日期:1998-02-01 00:00:00
abstract::Peste des petits ruminants (PPR) is a viral disease of small ruminants that is caused by the PPR virus (PPRV) and is a significant burden on subsistence farmers across the developing world. Loop-mediated isothermal amplification (LAMP) provides cost-effective, rapid, specific and sensitive detection of nucleic acid an...
journal_title:Journal of virological methods
pub_type: 杂志文章
doi:10.1016/j.jviromet.2019.113730
更新日期:2019-12-01 00:00:00
abstract::A large number of Norwalk-like viruses (NLVs) have been identified from stool samples by RT-PCR by amplifying part of the polymerase-coding gene. A set of probes were selected based on sequence analysis of the viruses circulating in Finland during the years 1996-97 for confirmation of the findings by hybridization. A ...
journal_title:Journal of virological methods
pub_type: 杂志文章
doi:10.1016/s0166-0934(99)00115-9
更新日期:1999-12-01 00:00:00
abstract::The genus Caulimovirus consists of several distinct virus species with a double-stranded DNA genome that infect diverse plant species. A comparative analysis of the sequences of known Caulimovirus species revealed two regions that are conserved in all Caulimovirus species with the exception of Strawberry vein banding ...
journal_title:Journal of virological methods
pub_type: 杂志文章
doi:10.1016/j.jviromet.2008.11.014
更新日期:2009-04-01 00:00:00
abstract::Enzyme-linked immunosorbent assay (ELISA) systems for serum IgG and IgM antibodies to human parvovirus B19 were established by utilizing anti-B19 monoclonal antibodies (mAbs) and human plasma B19 antigen. The specificities of IgG and IgM ELISA were confirmed by indirect immunofluorescence staining and Western blot imm...
journal_title:Journal of virological methods
pub_type: 杂志文章
doi:10.1016/0166-0934(89)90146-8
更新日期:1989-11-01 00:00:00
abstract::Vaccine manufacturing requires constant analytical monitoring to ensure reliable quality and a consistent safety profile of the final product. Concentration and bioactivity of active components of the vaccine are key attributes routinely evaluated throughout the manufacturing cycle and for product release and dosage. ...
journal_title:Journal of virological methods
pub_type: 杂志文章
doi:10.1016/j.jviromet.2010.01.016
更新日期:2010-06-01 00:00:00
abstract::Numerous strategies have been employed in an attempt to improve the immunogenicity and efficacy of nucleic acid vaccines. In the present study, the immunogenicity in the induction of humoral and cellular immune responses to HIV-1 DNA vaccine expressing a chimeric gene of gag and gp120 and the adjuvant effect of IFN-al...
journal_title:Journal of virological methods
pub_type: 杂志文章
doi:10.1016/j.jviromet.2007.07.016
更新日期:2007-12-01 00:00:00
abstract::We have developed a murine monoclonal antibody reactive with a major immediate early 72,000 dalton protein of human cytomegalovirus and utilized this reagent in a rapid virus titration and microneutralization assay. Because of the early expression of this virus encoded protein, both assays could be accomplished within...
journal_title:Journal of virological methods
pub_type: 杂志文章
doi:10.1016/0166-0934(89)90129-8
更新日期:1989-02-01 00:00:00
abstract::The use of adenovirus type 35 (Ad35) as a vector in vaccine and gene therapy studies is promising due to its broad cell tropism and low seroprevalence in humans. However, to date, a simple and effective system for producing recombinant Ad35 (rAd35) has not been well developed. This report describes a two-plasmid Ad35-...
journal_title:Journal of virological methods
pub_type: 杂志文章
doi:10.1016/j.jviromet.2011.06.016
更新日期:2011-10-01 00:00:00
abstract:BACKGROUND:Molecular assays for diagnosis of Flu A, Flu B, and RSV with short turn-around-time (TAT) are of considerable clinical importance. In addition, rapid and accurate diagnosis of a large panel of viral and atypical pathogens can be crucial in immunocompromised patients. OBJECTIVES:First, to evaluate the perfor...
journal_title:Journal of virological methods
pub_type: 杂志文章
doi:10.1016/j.jviromet.2017.03.013
更新日期:2017-07-01 00:00:00
abstract::Immune electron microscopy (IEM) cannot be used successfully for structures that do not have recognisable morphology. However, at least some of these structures or components are related antigenically to recognisable antigens or viruses. We have therefore mixed unknown antigens with known markers and looked for the pr...
journal_title:Journal of virological methods
pub_type: 杂志文章
doi:10.1016/0166-0934(81)90035-5
更新日期:1981-02-01 00:00:00
abstract::Dengue remains a global public health threat and development of a safe and effective vaccine is a principal public health goal. The primary correlate of immunity is thought to be neutralizing antibodies. Currently, the plaque reduction neutralization test (PRNT) is the gold standard measure of dengue neutralizing anti...
journal_title:Journal of virological methods
pub_type: 杂志文章
doi:10.1016/j.jviromet.2005.12.002
更新日期:2006-06-01 00:00:00
abstract::To formulate inactivated influenza vaccines, the concentration of hemagglutinin (HA) must be accurately determined. The standard test currently used to measure HA in influenza vaccines is the Single Radial Immunodiffusion (SRID) assay. We developed a very rapid, simple and sensitive alternative quantitative HA assay, ...
journal_title:Journal of virological methods
pub_type: 杂志文章
doi:10.1016/j.jviromet.2017.10.011
更新日期:2018-01-01 00:00:00
abstract::MicroRNAs (miRNAs) are a large class of endogenous approximately 22-nucleotide long non-coding RNAs involved in post-transcriptional silencing of gene expression by translational repression or direct cleavage of the target mRNAs. Several hundreds of miRNAs have now been identified in a wide range of organisms includin...
journal_title:Journal of virological methods
pub_type: 杂志文章
doi:10.1016/j.jviromet.2008.02.005
更新日期:2008-05-01 00:00:00
abstract::The increasing use of the baculovirus expression vector system (BEVS) has generated significant interest into techniques for quantifying baculovirus stocks. One method involves the use of quantitative real-time polymerase chain reaction (PCR). This study investigated simplifying baculovirus sample preparation for quan...
journal_title:Journal of virological methods
pub_type: 杂志文章
doi:10.1016/j.jviromet.2012.03.001
更新日期:2012-06-01 00:00:00
abstract::Bovine leukemia virus (BLV) is widely distributed in U.S. cattle herds. It infects B lymphocytes and causes neoplastic disease in 5-10% of infected animals. Direct economic losses are incurred as a result of death, reduced milk production and condemnation at slaughter. Thus the identification of cattle infected with B...
journal_title:Journal of virological methods
pub_type: 杂志文章
doi:10.1016/0166-0934(91)90009-o
更新日期:1991-06-01 00:00:00
abstract::Real-time polymerase chain reaction (real-time PCR) is an accurate, rapid and reliable method that can be used for the detection and also for the quantitation of specific DNA molecules. It can be non-specific, with intercalating dyes (SYBR Green I dye) able to bind to any dsDNA, or specific with a probe (TaqMan), wher...
journal_title:Journal of virological methods
pub_type: 杂志文章
doi:10.1016/j.jviromet.2012.05.010
更新日期:2012-09-01 00:00:00
abstract::TaqMan and SYBR Green quantitative PCR (qPCR) methods were developed as DNA-based approaches to reproducibly enumerate M13 and T7 phages from phage display selection experiments individually and simultaneously. The genome copies of M13 and T7 phages were quantified by TaqMan or SYBR Green qPCR referenced against M13 a...
journal_title:Journal of virological methods
pub_type: 杂志文章
doi:10.1016/j.jviromet.2017.11.012
更新日期:2018-02-01 00:00:00
abstract::We describe the isolation and characterization of infectious pseudorabies virus (PrV) mutants expressing functional beta-galactosidase. To obtain high level expression of the enzyme, sequences of the bacterial beta-galactosidase gene starting with codon 8 were inserted in frame behind the promoter and the first seven ...
journal_title:Journal of virological methods
pub_type: 杂志文章
doi:10.1016/0166-0934(90)90043-f
更新日期:1990-10-01 00:00:00
abstract::Hepatitis B-virucidal testing of biocides in quantitative suspension tests using duck hepatitis B virus (DHBV) requires primary duck embryonic hepatocytes for viral propagation. To improve the test system and availability of these cells, commercial culture plates with different growth surfaces were tested for cell cul...
journal_title:Journal of virological methods
pub_type: 杂志文章
doi:10.1016/j.jviromet.2008.12.004
更新日期:2009-04-01 00:00:00
abstract::Rapid alternative methods are required to evaluate easily acyclovir (ACV) sensitivity of clinical herpes simplex virus (HSV) isolates. The objective of this study was to screen 54 ACV-sensitive and 41 ACV-resistant clinical HSV-1 isolates, well characterized by phenotypic and genotypic methods, for the phosphorylation...
journal_title:Journal of virological methods
pub_type: 杂志文章
doi:10.1016/j.jviromet.2012.12.001
更新日期:2013-03-01 00:00:00
abstract::A real-time TaqMan RT-PCR assay was developed for the rapid and sensitive detection of Tomato ringspot virus (ToRSV), an important plant virus which infects a wide range of fruit and ornamental crops. Primers and a probe were designed based on the highly conserved 3'-untranslated region (UTR) sequences of ToRSV, to am...
journal_title:Journal of virological methods
pub_type: 杂志文章
doi:10.1016/j.jviromet.2014.02.011
更新日期:2014-06-01 00:00:00