Research has demonstrated that oral mucosal transudate (OMT), a serum-derived fluid that enters saliva from the gingival crevice and across oral mucosal surfaces, can be preferentially concentrated by a novel collecting system to yield detectable levels of immunoglobulins (i.e., IgG and IgM antibodies) against various bacterial and viral diseases. Assays based on OMT can aid in the diagnosis of disease and in the management of therapeutic drugs. A reliable and accurate OMT-based test to detect human immunodeficiency virus (HIV) antibodies is commercially available. Additional tests based on similar technologies may aid in the diagnosis of viral hepatitis, measles, mumps, and rubella as well as in monitoring levels of therapeutic drugs such as theophylline. The future use of OMT-based testing will likely increase because of the inherent advantages of this technology: convenience; avoidance of inadvertent transmission of blood-borne pathogens; ease of use in pediatric and geriatric populations; as well as the potential for blood-free home and workplace collection of patient samples.
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