In addition, Western blot readily documents seroconversion. The specificity of the Western blot assay provides an accurate distinction in 99% of patients between antibody to HSV-1 and antibodies to HSV-2. Our laboratory detects HSV Antibodies by Western blot assay, which is not only highly sensitive for detecting HSV antibodies, but also is highly accurate in differentiating past HSV-1 from HSV-2 infections and determining whether someone has antibodies to both viruses. However, serologies for HSV are useful in determining whether a person has had a past infection with HSV-1 or HSV-2, and is the best way to detect “silent carriers” of HSV-2. Viral isolation and subsequent subtyping is generally the best way to document an acute HSV infection. Search HBCA code in the online Laboratory Test Catalog for information on Hepatitis B Core Antibody (HBcAb). Search HBSA code in the online Laboratory Test Catalog for information on Hepatitis B Surface Antibody (HBsAb). Anti-HBs assays and anti-HBc assays are performed daily Monday through Friday. Vaccination/re-vaccination is warranted with values below this level. of Hepatitis B surface antibody are considered protective levels. Values above a test standard containing 10 I.U. The Hepatitis B surface antibody result is reported international units (I.U.) of Hepatitis B surface antibody. needle stick exposures), for documenting persons with past infection with Hepatitis B virus, for vaccine screening, and for determining response to vaccination. Hepatitis B surface antibody (anti-HBs) and Hepatitis B core antibody (anti-HBc) assays are useful for identifying persons susceptible to Hepatitis B infection (i.e. See Hepatitis B Chart 1, Chart 2, and Chart 3 Search HBB code in the online Laboratory Test Catalog for more information on Hepatitis B Battery (HBSAb, HBSAg, and HBCAb). Search HBSS code in the online Laboratory Test Catalog for more information on Hepatitis B Surface Antigen & Antibody (HBsAg, HBsAb). Search HBSAG or HBSAGX code in the online Laboratory Test Catalog. Note: Positive HBsAg will reflex to a Hepatitis B DNA by PCR at an additional charge. The physician must also report acute Hepatitis B infections to the local County Department of Public Health (in King County, telephone the Communicable Disease Department at (206) 296-4774). The routine HBsAg run can accommodate most specimens generated by accidental parenteral exposure. Patients with needle sticks and other parenteral exposures need to receive Hepatitis B Immune Globulin within 72 hours of exposure. Reports of reactive HBsAg are called to the ordering physician or laboratory and are automatically run for Hepatitis B viral DNA by PCR. Infectivity of a patient is determined by enzyme immunoassay for Hepatitis B surface antigen (HBsAg), which is run Monday through Friday. Hepatitis B is transmitted through blood or secretions of infected patients.
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