Abstract:
:A new serological assay, the recombinant flow cytometric immunofluorescence assay (r-FIFA), was developed for the early detection of human immunodeficiency virus type 1 (HIV-1) antibodies by using recombinant insoluble forms of HIV-1 Gag-p45, Gag-gp41 chimeric protein, gp160, Po197 polyprotein as antigens and autologous carriers through flow cytometry. These recombinant proteins were expressed in insect cells by a baculovirus expression system. Eight anti-HIV-1 seroconversion panels, a low-titer anti-HIV-1 panel from Boston Biomedica Inc. (BBI), and three HIV-1 seroconversion specimens from the Provincial Health Laboratory of Ontario, Toronto, Ontario, Canada (PHL), were tested and analyzed by r-FIFA. In sensitivity comparisons between r-FIFA and tests licensed by the U.S. Food and Drug Administration, which were used to test all of the HIV-1 panels from BBI, detection of HIV-1 antibody by r-FIFA was on average greater than 20 days earlier than that by enzyme immunoassay. The sensitivity of r-FIFA has permitted the detection of HIV-1-specific immunoglobulin G (IgG), IgM, and IgA antibodies during seroconversion. A kinetic analysis of HIV-1 antibody production of r-FIFA has shown that either IgG or IgM, or both, can be detected, depending on the phase and type of the immune response in the HIV-1-infected individual. Both primary and secondary immune responses were observed during this period. The r-FIFA results suggest that implementation of r-FIFA may significantly reduce the "window" period from the time of infection to the time of seroconversion, with earlier detection of antibodies after initial infection. This would also make it possible for us to understand the immune response and the precise mechanisms of immunopathogenesis in the early period of HIV-1 infection.
journal_name
J Clin Microbioljournal_title
Journal of clinical microbiologyauthors
Hu YW,Birch P,Balaskas E,Zeibdawi A,Scalia V,Thériault-Valin SA,Gill P,Aye MTdoi
10.1128/JCM.34.6.1412-1419.1996subject
Has Abstractpub_date
1996-06-01 00:00:00pages
1412-9issue
6eissn
0095-1137issn
1098-660Xjournal_volume
34pub_type
杂志文章abstract::In spite of the excellent performance of rapid tuberculosis (TB) nucleic acid amplification (NAA) tests and the clear benefits of immediate diagnosis of TB disease, NAA tests frequently are not used in the diagnosis of pulmonary TB cases, particularly TB cases with smear-negative sputa. Public health laboratories prim...
journal_title:Journal of clinical microbiology
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abstract::A selective medium was developed for the isolation of Bacteroides fragilis directly from ovine and bovine fecal samples. The medium (tryptose blood agar plus polymyxin B, triclosan (Irgasan), novobiocin, and nalidixic acid) permitted growth of B. fragilis and several other species of Bacteroides but inhibited growth o...
journal_title:Journal of clinical microbiology
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doi:10.1128/JCM.21.3.472-473.1985
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journal_title:Journal of clinical microbiology
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journal_title:Journal of clinical microbiology
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journal_title:Journal of clinical microbiology
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doi:10.1128/JCM.30.9.2235-2240.1992
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journal_title:Journal of clinical microbiology
pub_type: 杂志文章
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journal_title:Journal of clinical microbiology
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journal_title:Journal of clinical microbiology
pub_type: 杂志文章
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journal_title:Journal of clinical microbiology
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doi:10.1128/JCM.36.5.1271-1276.1998
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journal_title:Journal of clinical microbiology
pub_type: 杂志文章
doi:10.1128/JCM.21.5.753-758.1985
更新日期:1985-05-01 00:00:00
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journal_title:Journal of clinical microbiology
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journal_title:Journal of clinical microbiology
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journal_title:Journal of clinical microbiology
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更新日期:2005-06-01 00:00:00
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journal_title:Journal of clinical microbiology
pub_type: 杂志文章
doi:10.1128/JCM.37.12.4113-4119.1999
更新日期:1999-12-01 00:00:00
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journal_title:Journal of clinical microbiology
pub_type: 杂志文章,多中心研究
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journal_title:Journal of clinical microbiology
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更新日期:2019-01-02 00:00:00
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journal_title:Journal of clinical microbiology
pub_type: 杂志文章
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journal_title:Journal of clinical microbiology
pub_type: 杂志文章
doi:10.1128/JCM.26.10.2216-2217.1988
更新日期:1988-10-01 00:00:00
abstract::One hundred ninety-three Streptococcus agalactiae isolates of neonatal origin and 146 isolates from adult women were analyzed for macrolide resistance and investigated for clonality. Among erythromycin-resistant isolates, serotype V turned out to be the most frequent. Comparative pulsed-field gel electrophoresis analy...
journal_title:Journal of clinical microbiology
pub_type: 杂志文章
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更新日期:2003-05-01 00:00:00
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更新日期:2004-07-01 00:00:00
abstract::A quantitative, indirect, fluorescence immunoassay (FIAX; Whittaker Bioproducts, Inc.) was compared with the conventional indirect fluorescent-antibody test for detection of serum antibody to Borrelia burgdorferi. FIAX correlated well with the indirect fluorescent-antibody test (r = 0.72). FIAX is a convenient and dep...
journal_title:Journal of clinical microbiology
pub_type: 杂志文章
doi:10.1128/JCM.25.11.2218-2220.1987
更新日期:1987-11-01 00:00:00
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journal_title:Journal of clinical microbiology
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journal_title:Journal of clinical microbiology
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doi:10.1128/JCM.20.4.763-771.1984
更新日期:1984-10-01 00:00:00
abstract::A loop-mediated isothermal amplification (LAMP) method for the rapid detection of serotype 1 Marek's disease virus (MDV) was developed. The method used a set of three pairs of primers to amplify the MEQ gene for detecting serotype 1 MDV. The MDV LAMP method did not cross-react with serotype 2 and serotype 3, nor did t...
journal_title:Journal of clinical microbiology
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journal_title:Journal of clinical microbiology
pub_type: 杂志文章
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更新日期:2009-02-01 00:00:00
abstract::We have developed a novel and practical DNA-RNA hybridization assay for the detection and identification of Campylobacter pylori in the gastric mucosa. This technique utilizes a [32P]ddATP-labeled synthetic oligonucleotide probe complementary to a nucleotide sequence present in C. pylori 16S rRNA. This probe is very s...
journal_title:Journal of clinical microbiology
pub_type: 杂志文章
doi:10.1128/JCM.27.12.2652-2655.1989
更新日期:1989-12-01 00:00:00