Heptadecanoic Acid is an odd chain fatty acid.

Fatty acids with odd numbers of carbon atoms are produced primarily by initiating the synthetic series with the three carbon compound, propionic acid.

The marker "Herpes Simplex 1 Ab, IgG" on a sexually transmitted disease (STD) test panel refers to the detection of Immunoglobulin G (IgG) antibodies specific to Herpes Simplex Virus Type 1 (HSV-1) in an individual's blood. HSV-1 is primarily known for causing oral herpes, which manifests as cold sores or fever blisters, but it can also cause genital herpes. The presence of IgG antibodies is indicative of a past or current HSV-1 infection, as these antibodies are produced by the immune system in response to the virus and remain in the body for life, providing long-term immunity.

The IgG antibodies for HSV-1 typically develop within a few weeks to months after initial exposure to the virus and are detectable through serological testing. These antibodies play a critical role in controlling and containing herpes outbreaks but do not eradicate the virus. The virus resides latently in the nerve cells and can reactivate, leading to recurrent infections. Unlike IgM antibodies, which are produced first and indicate recent infection, IgG antibodies suggest a longer-term or past infection.

The marker "Herpes Simplex 2 Ab, IgG" on a sexually transmitted disease (STD) test panel is indicative of a serological test for detecting Immunoglobulin G (IgG) antibodies specific to Herpes Simplex Virus Type 2 (HSV-2). HSV-2 is predominantly associated with genital herpes, a viral infection characterized by periodic outbreaks of painful sores or blisters in the genital area. The presence of IgG antibodies against HSV-2 generally signifies past exposure to the virus, either through symptomatic infections or asymptomatic viral shedding. Unlike IgM antibodies, which appear soon after infection and then wane, IgG antibodies develop within weeks to months post-exposure and persist for life, offering long-term immune response.

This assay utilizes recombinant type-specific antigens to differentiate HSV-1 from HSV-2 infections. A index positive result cannot distinguish between recent and past infection. If recent HSV infection is suspected but the results are negative or equivocal, the assay should be repeated in 4-6 weeks. The performance index characteristics of the assay have not been established for pediatric populations, immunocompromised patients, or neonatal screening.

Herpes Simplex Virus 1 and 2 (IgG), Type-Specific Antibodies - Herpes Simplex Virus (HSV) is responsible for several clinically significant human viral diseases, with severity ranging from inapparent to fatal. Clinical manifestations include genital tract infections, neonatal herpes, meningoencephalitis, keratoconjunctivitis, and gingivostomatitis. There are two HSV serotypes that are closely related antigenically. HSV Type 2 is more commonly associated with genital tract and neonatal infections, while HSV Type 1 is more commonly associated with infections of non-genital sites. Specific typing is not usually required for diagnosis or treatment. 

A herpes IgM (immunoglobulin M) test is a blood test that can detect early herpes simplex virus (HSV) infection. HSV is a contagious condition that causes sores around the mouth or genitals. The IgM test does not detect herpes directly. Instead, it looks for IgM, a type of antibody. This is a protein produced by the immune system in response to a herpes infection.

Human herpesvirus 6 (HHV-6) is a set of two closely related herpesviruses, HHV6-A and HHV6-B. Human Herpesvirus 6 (HHV-6) has long been suspected as one trigger for Chronic Fatigue Syndrome. 

The detection of IgM antibodies specific to HHV-6 is a common diagnostic tool used to assess whether an individual has recently been exposed to or is currently experiencing an active infection with this virus. IgM antibodies are produced by the immune system in response to a new or acute infection, and their presence in the blood indicates that the body is mounting an immune response to combat the virus. However, it's important to note that the presence of HHV-6 IgM antibodies does not necessarily mean that an individual is currently symptomatic, as this virus can establish latency in the body and reactivate later in life without causing obvious symptoms.

Hexacarboxyporphyrin is a Porphyrin. Porphyrins are precursors of heme and usually only occur in urine in negligible amounts.

Hexacarboxyporphyrin is a Porphyrin. Porphyrins are precursors of heme and usually only occur in urine in negligible amounts.

Hexacosanoic acid is a saturated fatty acid. It is a very long-chain fatty acid. Accumulation of certain very long chain fatty acids (VLCFAs) is associated with degenerative diseases of the central nervous system.

The Hexagonal Phase Confirm test is a specific laboratory test used to detect lupus anticoagulant (LA), which is a type of antibody associated with antiphospholipid syndrome and other autoimmune disorders. The term "Hexagonal Phase" refers to a particular method of confirming the presence of LA. This test is part of a broader Lupus Anticoagulant Evaluation which may include various other tests to assess for the presence of these antibodies because they show a great deal of heterogeneity.

The Hexagonal Phase Phospholipid test detects lupus anticoagulants (LA), autoantibodies linked to clotting disorders and antiphospholipid syndrome (APS). Using a specific phase of phospholipids, it sensitively identifies LA, which disrupt normal clotting processes. A positive result suggests an increased risk of blood clots or complications like recurrent miscarriages, while a negative result typically rules out LA as a factor. This test, often performed alongside others like dRVVT, is crucial for diagnosing APS and guiding treatment to manage clotting risks. Abnormal results should be reviewed with a healthcare provider for further evaluation and management.

The Hexagonal Phospholipid Neutralization test is a laboratory test used to detect lupus anticoagulants, which are antibodies that can lead to blood clotting problems. It is highly sensitive but may require additional tests for confirmation in the clinical assessment of antiphospholipid syndrome and related disorders.

Urinary hexanoylglycine is a specific marker for the diagnosis of Medium-chain acyl-CoA dehydrogenase (MCAD) deficiency.