Abstract:
:Surveillance methods that measure St. Louis encephalitis (SLE) virus activity in nature may provide forewarning of its epidemic occurrence in humans. An antigen capture enzyme immunoassay was developed to detect SLE virus in infected mosquitoes. The assay detected purified SLE viral antigen at a concentration of 62 pg/0.1 ml when antigen was incubated overnight; 250 pg/0.1 ml was detected in a single-day assay (antigen incubated for 3 h). The assay detected 67.9 and 70.8% of laboratory-prepared pools of infected mosquitoes after 3 h and overnight incubation, respectively. The sensitivity of the procedure was 90.5% in identifying pools with infectious titers greater than dex 3.0. The specificity of the assay was controlled by retesting positive pools preincubated with SLE virus and normal antibodies, which led to a diminution of signal in the pools containing viral antigen. The procedure was suitably specific in discriminating between SLE and related flaviviruses, detecting only high infectious doses of heterologous antigens.
journal_name
J Clin Microbioljournal_title
Journal of clinical microbiologyauthors
Tsai TF,Bolin RA,Montoya M,Bailey RE,Francy DB,Jozan M,Roehrig JTdoi
10.1128/JCM.25.2.370-376.1987subject
Has Abstractpub_date
1987-02-01 00:00:00pages
370-6issue
2eissn
0095-1137issn
1098-660Xjournal_volume
25pub_type
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journal_title:Journal of clinical microbiology
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