ABSTRACT
The Coupled Particle Light Scattering technique was evaluated for serological diagnosis of Epstein-Barr Virus (EBV) infection. Two hundred ninety-six patient sera selected from several clinical categories (acute infection, non-primary infection, interfering non-EBV infection, non-infected) were tested for IgM and IgG antibodies (anti-VCA, anti-EBNA and anti-EA). Determination of EBV IgG with Copalis multiplex was accurate when compared with Enzygnost Anti-EBV/IgG ELISA. Although the sensitivity of Copalis IgM for acute infections was 100% a positive IgM result did not always indicate an acute infection. Strong reactivity to IgG EA (ratio 3, 1) and IgG VCA (ratio 13, 3) correlated with persistent infection or reactivation. The CopalisI has many advantages over the existing methods, such as the possibility to measure three semi-quantitative IgG responses to three different EBV antigens simultaneously.
Subject(s)
Antibodies, Viral/blood , Capsid Proteins , Epstein-Barr Virus Infections/diagnosis , Immunoassay/methods , Antigens, Viral/immunology , Epstein-Barr Virus Infections/blood , Epstein-Barr Virus Nuclear Antigens/immunology , Humans , Immunoglobulin G/blood , Immunoglobulin M/blood , Light , Sensitivity and SpecificityABSTRACT
OBJECTIVE: A case of a sudden awakening from a near coma after combined intake or gamma-hydroxybutyric acid (GHB) (125 micrograms/mL), ethanol (134 mg/dL), and cannabinoids is described. METHODS: GHB was determined by gas chromatography-mass spectrometry after acetonitrile precipitation and derivation with N-methyl-N-trimethylsilyltrifluoroacetamide, using valproic acid as the internal standard. CONCLUSION: The described case illustrates the consequences of GHB overdose. GHB overdose should be considered in every case of unexplained sudden coma, i.e., without any evidence of head injury, intake of coma-inducing drugs, or increasing intracranial pressure. GHB overdose will be missed by routine toxicological screening.
