Abstract：
:CD4 T-cell count is a priority for staging HIV disease and guiding clinical management as part of HIV care. Conventional CD4 T-cell enumeration methods based on flow cytometry are expensive, require well-trained personnel, and are challenging to use in rural, resource-scarce areas. A simple CD4 T-cell count test that can be used at point-of care, the Flow-Through cell Counting Assay (FTCA), is described in this article. The FTCA is based on the use of: 1) a special membrane that selectively retains white blood cells (WBCs); 2) a sample delivery system; and 3) optical signal detection. To show the feasibility of the FTCA, a proof-of-concept prototype of the FTCA cassette and digital camera or handheld reflectance meter were used for obtaining quantitative assay results within 30 min. The results show that the FTCA allows for quantitative enumeration of CD4 T-cells in the clinically relevant range of CD4 T-cell concentrations. The advantages of the FTCA technology, including simplicity, short analysis time, and portability, suggest that FTCA has great potential for use in clinical practice and wide applicability for other cell-based diagnostic tests.
journal_name
J Virol Methodsjournal_title
Journal of virological methodsauthors
Bystryak S,Bandwar RP,Santockyte Rdoi
10.1016/j.jviromet.2019.05.012subject
Has Abstractpub_date
2019-09-01 00:00:00pages
113672eissn
0166-0934issn
1879-0984pii
S0166-0934(19)30093-Xjournal_volume
271pub_type
杂志文章abstract：:Porcine reproductive and respiratory syndrome virus (PRRSV) became a significant pathogen of swine upon its emergence in the late 1980s and since then has exemplified a rapidly evolving, constantly re-emerging pathogen. In addition to the challenges faced in development of vaccines and diagnostics, research on the bas...
journal_title：Journal of virological methods
pub_type： 杂志文章
doi：10.1016/j.jviromet.2015.02.007
更新日期：2015-06-15 00:00:00
abstract：:A novel multiplex nested PCR (nPCR) method was developed for detecting and differentiating simultaneously the DNA of polyomaviruses JC, BK and SV40 in a single tube. In the first amplification step the same set of primers were used to amplify a conserved DNA region of the large T antigen gene of JCV, BKV and SV40. The...
journal_title：Journal of virological methods
pub_type： 杂志文章
doi：10.1016/s0166-0934(99)00095-6
更新日期：1999-10-01 00:00:00
abstract：:Receptor-mediated endocytosis was employed for a highly efficient transport of oligodeoxynucleotides into hepatoma cell line PLC/PRF/5. The oligodeoxynucleotides were bound to the asialofetuin-poly-L-lysine conjugate and this complex was internalized by the cells via asialoglycoprotein receptor, an endocytic receptor ...
journal_title：Journal of virological methods
pub_type： 杂志文章
doi：10.1016/0166-0934(93)90181-p
更新日期：1993-04-01 00:00:00
abstract：:We assessed the performance of Abbott RealTime CMV assay (ARC) compared to Roche Cobas Amplicor CMV Monitor Test (RCM) for quantification of CMV in plasma of transplant patients. Commercial panels were used to test linearity, precision and interference and 83 clinical samples were used for the accuracy and precision a...
journal_title：Journal of virological methods
pub_type： 杂志文章
doi：10.1016/j.jviromet.2015.08.010
更新日期：2015-12-01 00:00:00
abstract：:Details of a procedure for detecting double-stranded RNA (dsRNA) in virus and viroid infected tissue extracts using serologically specific electron microscopy are given. A method for staining dsRNA, based on in situ formation of uranyl phosphate, that consistently permits the examination of dsRNA by electron microscop...
journal_title：Journal of virological methods
pub_type： 杂志文章
doi：10.1016/0166-0934(84)90055-7
更新日期：1984-12-01 00:00:00
abstract：:HCV-RNA was examined in serum and liver tissue obtained from 8 hepatitis B surface antigen (HBsAg) negative patients with liver nodules ranging in size from 2 to 11 cm. Histological examination of ultrasound-guided fine needle biopsies revealed the presence of hepatocellular carcinoma (HCC) in six patients (5 of whom ...
journal_title：Journal of virological methods
pub_type： 杂志文章
doi：10.1016/0166-0934(94)90112-0
更新日期：1994-07-01 00:00:00
abstract：:The pandemic caused by SARS-CoV-2 has triggered an extraordinary collapse of healthcare systems and hundred thousand of deaths worldwide. Following the declaration of the outbreak as a Public Health Emergency of International Concern by the World Health Organization (WHO) on January 30th, 2020, it has become imperativ...
journal_title：Journal of virological methods
pub_type： 杂志文章
doi：10.1016/j.jviromet.2020.114035
更新日期：2020-12-04 00:00:00
abstract：:The development of rapid and simple gene amplification tests is required for detection of pathogens to prevent transmission of infectious diseases between animals or from animals to humans. An easy-to-use rapid gene amplification method that can directly detect RNA and DNA viruses in clinical samples was developed. Th...
journal_title：Journal of virological methods
pub_type： 杂志文章
doi：10.1016/j.jviromet.2014.01.019
更新日期：2014-06-01 00:00:00
abstract：:A molecular diagnostic assay for the rapid, sensitive and specific detection of Apple stem pitting virus (ASPV) in infected samples, utilizing reverse transcription-recombinase polymerase amplification (RT-RPA) at an isothermal constant temperature of 42 °C and the designed target-specific primers, was developed. The ...
journal_title：Journal of virological methods
pub_type： 杂志文章
doi：10.1016/j.jviromet.2019.113747
更新日期：2019-12-01 00:00:00
abstract：:The development of a rapid and highly sensitive PCR assay for the detection of human rhinoviruses (HRVs) in nasopharyngeal aspirates is described. Two simple and fast commercial RNA extraction methods and four primer pairs were compared. The most sensitive RNA extraction method (Ultraspec) and primer pair (A) were app...
journal_title：Journal of virological methods
pub_type： 杂志文章
doi：10.1016/s0166-0934(97)00049-9
更新日期：1997-06-01 00:00:00
abstract：:Phenolic compounds from plant tissues inhibit reverse transcription-polymerase chain reaction (RT-PCR). Multiple-step protocols using several additives to inhibit polyphenolic compounds during nucleic acid extraction are common, but time consuming and laborious. The current research highlights that the inclusion of 0....
journal_title：Journal of virological methods
pub_type： 杂志文章
doi：10.1016/s0166-0934(01)00391-3
更新日期：2002-01-01 00:00:00
abstract：:Molecular assays are currently the most widely used method to quantify pathogenic viruses in water; however, their performance is often disrupted by matrices present in environmental samples. The present study used ferrihydrite (Fh) treatment to mitigate inhibition of RT-qPCR virus detection from environmental water c...
journal_title：Journal of virological methods
pub_type： 杂志文章
doi：10.1016/j.jviromet.2018.10.018
更新日期：2019-01-01 00:00:00
abstract：:A rapid and efficient method is described for isotype quantitation of antiviral antibodies in mice infected with Theiler's murine encephalomyelitis virus (TMEV). Serum antibodies were reacted with fluorochrome-labeled TMEV in a modified fluid-phase particle concentration fluorescence immunoassay (PCFIA). Biotin and av...
journal_title：Journal of virological methods
pub_type： 杂志文章
doi：10.1016/0166-0934(90)90135-3
更新日期：1990-02-01 00:00:00
abstract：:Due to the ease of collection, oral fluid is being investigated as an alternative to serum for diagnostic and epidemiological purposes. However, for prospective studies involving hepatitis A virus (HAV) RNA detection, a standard methodology must be developed. In the present study, nested RT-PCR and real-time PCR were ...
journal_title：Journal of virological methods
pub_type： 杂志文章
doi：10.1016/j.jviromet.2007.10.020
更新日期：2008-03-01 00:00:00
abstract：:Cellular nucleic acids can interfere with the molecular cloning of retroviruses, a problem that is particularly serious with viruses propagated in lymphoblastoid cells that release large amounts of microvesicles and other cellular components. The approach taken to circumvent such problems involved first suspending vir...
journal_title：Journal of virological methods
pub_type： 杂志文章
doi：10.1016/j.jviromet.2006.07.003
更新日期：2006-11-01 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：:Phage-displayed random peptide libraries are widely used for identifying peptide interactions with proteins and other substrates. Selection of peptide ligands involves iterative rounds of affinity enrichment. The binding properties of the selected phage clones are routinely tested using immunoassay after propagation t...
journal_title：Journal of virological methods
pub_type： 杂志文章
doi：10.1016/j.jviromet.2015.04.023
更新日期：2015-09-01 00:00:00
abstract：:Bovine viral diarrhea virus (BVDV) should be a ubiquitous viral pathogen to the cattle and sheep industry. This pathogen is responsible for severe economic losses. We previously showed that plasmid-mediated dual short hairpin RNA (shRNA) efficiently inhibit BVDV replication in bovine kidney epithelial (MDBK) cells. In...
journal_title：Journal of virological methods
pub_type： 杂志文章
doi：10.1016/j.jviromet.2015.03.014
更新日期：2015-06-15 00:00:00
abstract：:Infection with human papillomavirus (HPV) is an important etiological factor in the development of cervical cancer, and detection of the viral genome is of prognostic importance, particularly for preneoplastic lesions. We developed a simple, easy and efficient non-organic method of DNA extraction from cervical scrapes...
journal_title：Journal of virological methods
pub_type： 杂志文章
doi：10.1016/0166-0934(92)90157-9
更新日期：1992-01-01 00:00:00
abstract：:A polymerase chain reaction (PCR) assay was developed for detection of bovine retrospumavirus (bovine syncytial virus; BSV) provirus DNA. Two different sets of oligonucleotide primers complementary to sequences located in the gag and the pol/env gene regions were used and compared for their ability to amplify the targ...
journal_title：Journal of virological methods
pub_type： 杂志文章
doi：10.1016/s0166-0934(98)00179-7
更新日期：1999-03-01 00:00:00
abstract：:A technique for coupling foot-and-mouth disease virus (FMDV) to tanned sheep red blood cells (SRBC) is reported. Different parameters influencing the procedure were studied. Subtypes C2, C3, O1 and A24 were used as antigens, and guinea pig hyperimmune sera obtained were tested for specific antibody in passive hemagglu...
journal_title：Journal of virological methods
pub_type： 杂志文章
doi：10.1016/0166-0934(88)90131-0
更新日期：1988-08-01 00:00:00
abstract：:Epidemics of acute hemorrhagic conjunctivitis are always explosive and extensive, and have been recognized as a serious international public health problem. Enterovirus 70 and coxsackievirus A24 variant have been identified as the major etiological agents in acute hemorrhagic conjunctivitis outbreaks worldwide. A nove...
journal_title：Journal of virological methods
pub_type： 杂志文章
doi：10.1016/j.jviromet.2009.02.022
更新日期：2009-07-01 00:00:00
abstract：:The reverse transcriptase of the sheep lentivirus visna/maedi virus has been characterised. Optima for magnesium ion concentration (5-10 mM), potassium ion concentration (150 mM) and pH (8.25) for this enzyme are very similar to those previously described for the human immunodeficiency viruses. The assay used for this...
journal_title：Journal of virological methods
pub_type： 杂志文章
doi：10.1016/0166-0934(92)90144-3
更新日期：1992-02-01 00:00:00
abstract：:Hepatitis A virus (HAV) is an important cause of foodborne disease worldwide. The detection of this virus in naturally contaminated food products is complicated by the absence of a reliable culture method, low levels of contamination, and the presence of matrix-associated compounds which inhibit molecular detection. I...
journal_title：Journal of virological methods
pub_type： 杂志文章
doi：10.1016/j.jviromet.2007.08.024
更新日期：2008-01-01 00:00:00
abstract：:A simple and rapid solid-phase reverse transcriptase assay was developed based on the use of poly(rA):oligo(dT)12-18 as template primer immobilized on DEAE cellulose paper squares to detect human immunodeficiency virus (HIV) and/or other retroviruses in cell culture supernatants. It was found that PEG (per se) -up to ...
journal_title：Journal of virological methods
pub_type： 杂志文章
doi：10.1016/0166-0934(90)90095-w
更新日期：1990-03-01 00:00:00
abstract：:The diagnosis of acute hepatitis E infection is based on the detection of HEV RNA or specific IgM in immunocompetent patients. Viraemia and excretion of HEV RNA in faeces are not observed in all patients and commercial kits vary in their performance for anti-HEV IgM detection. Additional diagnostic tests must therefor...
journal_title：Journal of virological methods
pub_type： 杂志文章
doi：10.1016/j.jviromet.2009.11.028
更新日期：2010-03-01 00:00:00
abstract：:Studies were performed to identify a pair of primers, specific for the tick-borne encephalitis (TBE) virus complex of the Flaviviridae, with which to develop a rapid and specific identification system based on reverse transcription and the polymerase chain reaction (RT-PCR). The specificity of a putative primer pair w...
journal_title：Journal of virological methods
pub_type： 杂志文章
doi：10.1016/0166-0934(93)90144-g
更新日期：1993-11-01 00:00:00
abstract：:Pollen transmitted viruses require accurate detection and identification to minimize the risk of spread through the global import and export of pollen. Therefore in this study we developed RT-qPCR assays for the detection of Cherry leaf roll virus (CLRV), Prune dwarf virus (PDV), Prunus necrotic ringspot virus (PNRSV)...
journal_title：Journal of virological methods
pub_type： 杂志文章
doi：10.1016/j.jviromet.2019.113673
更新日期：2019-09-01 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 Staphylococcus protein A coagglutination test (Sp A COAT) was developed for the diagnosis of rabbit haemorrhagic disease (RHD). Liver, spleen, lungs and kidneys from 176 rabbits dead from viral haemorrhagic disease as well as the same organs from 64 healthy animals were examined by Sp A COAT and haemaglutination t...
journal_title：Journal of virological methods
pub_type： 杂志文章
doi：10.1016/0166-0934(95)01914-6
更新日期：1996-03-01 00:00:00
