Explore our database of over 4000 laboratory markers.

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Hemp

Array 4 - Gluten-Associated Cross-Reactive Foods and Foods Sensitivity, Cyrex Laboratories

Optimal range:   0 - 2.3 ELISA Index

The presence of antibodies to Hemp is an indication of food immune reactivity. The offending food and its known cross-reactive foods should be eliminated from the diet. Hemp is emerging as a popular alternative food source, especially for vegetarians. Very few studies have been done on Hemp as a food source, although some cases of sensitization and allergy to the plant have been reported.

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Heneicosanoic (Genova)

Genova Diagnostics (various), Genova Diagnostics

Optimal range:   0 - 0.74 µmol/L

Heneicosanoic acid is an odd-numbered saturated 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. Vitamin B12 is required for the conversion of propionate into succinate for oxidation in the central energy pathways. Deficiency of vitamin B12 results in accumulation of propionate and subsequent buildup of the odd numbered fatty acids, such as heneicosanoic acid.

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Hep A Ab, IgM

Infectious Disease Profile

Reference range:   Negative, Positive

What is hepatitis A?

Hepatitis A is a result of infection with the hepatitis A virus. Hepatitis A is a contagious liver disease that can range in severity from a mild illness lasting a few weeks to a severe illness causing liver failure. Most people infected with the virus get well within 6 months. However, hepatitis A can be serious for older people and people who already have liver disease such as hepatitis B or C.

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Hep A Ab, Total

Infectious Disease Profile

Reference range:   Negative, Positive

Hep A Ab, Total refers to the total antibody test for Hepatitis A virus (HAV). This test measures the overall level of antibodies, including both IgM and IgG antibodies, produced by the body in response to HAV infection or vaccination. IgM antibodies typically appear early during acute infection, while IgG antibodies persist for a longer duration, providing immunity against future infections.

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Hep B Core Ab, IgM

Infectious Disease Profile

Reference range:   Negative, Positive

Anti-HBc IgM increases rapidly, peaks during the acute infection stage of HBV infection, and then falls to a relatively low level as the patient recovers or becomes a chronic carrier. Anti-HBc IgM is useful in the diagnosis of acute HBV infection even when HBsAg concentrations are below the sensitivity of the diagnostic assay. The presence of anti-HBc IgM and anti-HBc IgG is characteristic of acute infection, while the presence of anti-HBc IgG without anti-HBc IgM is characteristic of chronic or recovered stages of HBV infection. The use of other viral markers such as HBsAg, anti-HBs, and anti-HBc total to differentiate acute from chronic hepatitis B is inconclusive because most of these markers are alsoseen in chronic infection.

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Hep B Core Ab, Tot

Infectious Disease Profile

Reference range:   Negative, Positive

Hep B Core Ab, Tot [aka Total antibody to hepatitis B core antigen (anti-HBc)] appears at the onset of symptoms in acute hepatitis B, is a measure of both IgM and IgG, and persists for life. The presence of total anti-HBc indicates previous or ongoing infection with hepatitis B virus in an undefined time frame. People who have immunity to hepatitis B from a vaccine do not develop anti-HBc.

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Hep B Surface Ab, Qual

Infectious Disease Profile

Reference range:   Non Reactive, Reactive

Hep B Surface Ab, Qual refers to the qualitative test for Hepatitis B Surface Antibody (HBsAb). This test determines the presence or absence of antibodies against the Hepatitis B virus on the surface of the hepatocytes. A positive result suggests that the individual has developed immunity to the Hepatitis B virus, either through prior infection or successful vaccination.

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Hep C Virus Ab

Infectious Disease Profile

Reference range:   Non Reactive, Reactive

A blood test, called an HCV antibody test, is used to find out if someone has ever been infected with the hepatitis C virus. The HCV antibody test, sometimes called the anti-HCV test, looks for antibodies to the hepatitis C virus in blood. Antibodies are chemicals released into the bloodstream when someone gets infected. Test results can take anywhere from a few days to a few weeks to come back.

Most people who get infected with hepatitis C virus (HCV) develop a chronic, or lifelong, infection. Left untreated, chronic hepatitis C can cause serious health problems, including liver damage, cirrhosis, liver cancer, and even death. People can live without symptoms or feeling sick, so testing is the only way to know if you have hepatitis C. Getting tested is important to find out if you are infected so you can get lifesaving treatment that can cure hepatitis C.

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Hepatitis A

Vaccination

Vaccination Tracker

Reference range:   Vaccinated, Not vaccinated

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Hepatitis A Virus Antibody

Infectious Disease Profile

Optimal range:   0 - 1 index

Hepatitis A is a viral infection of the liver. This tests for the presence of hepatitis A antibodies. Elevated levels reflect immunity either through previous vaccination or exposure to the illness.

Measures both IgG and IgM forms of the antibody, but does not differentiate between these two forms. Hepatitis A antibody of IgG type is indicative of old infection and is found in almost 50% of adults.

 

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Hepatitis B

Vaccination

Vaccination Tracker

Reference range:   Vaccinated, Not vaccinated

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Hepatitis B Core Antibody (Total)

Infectious Disease Profile

Optimal range:   0 - 0.5 index

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Hepatitis B Surf Ab Quant

Infectious Disease Profile

Optimal range:   9.9 - 1000 mIU/ml

Presence of antibody to hepatitis B surface antigen (anti-HBs) is used to determine immune status to HBV or disease progression in individuals infected with HBV. Anti-HBs levels can be measured to determine if vaccination is needed, or following a vaccination regimen, to determine if protective immunity has been achieved.

- Anti-HBs usually can be detected several weeks to several months after HBsAg is no longer found, and it may persist for many years or for life after acute infection has been resolved.

- It may disappear in some patients, with only antibody to core remaining.

- People with this antibody are not overtly infectious.

- Presence of the antibody without the presence of the antigen is evidence for immunity from reinfection, with virus of the same subtype.

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Hepatitis B Surface Antibody

Infectious Disease Profile

Optimal range:   0 - 7.5 index

The hepatitis B surface antibody test (HBsAb), looks for antibodies that your immune system makes in response to the surface protein of the hepatitis B virus. 

The presence of anti-HBs is generally interpreted as indicating recovery and immunity from hepatitis B virus infection.

Anti-HBs also develops in a person who has been successfully vaccinated against hepatitis B. Among vaccine responders who completed a vaccine series, anti-HBs levels can decline over time, however the majority are still immune and will mount a response when exposed to HBV.

< 10 mIU/mL is considered nonreactive for antibodies agains Hepatitis B surface antigen.

>= 10 mIU/mL is considered reactive for antibodies against Heptitis B surface antigen

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Hepatitis B Surface Antibody, Qualitative

Infectious Disease Profile

Reference range:   Non-Reactive, Reactive

The hepatitis B surface antibody test (HBsAb), looks for antibodies that your immune system makes in response to the surface protein of the hepatitis B virus. 

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Hepatitis B Surface Antigen (HBsAg Screen)

Infectious Disease Profile

Optimal range:   0 - 1 index

This assay can be used in conjunction with other serological and clinical information to diagnose individuals with acute or chronic hepatitis B infection. This assay may also be used to screen for hepatitis B infection in pregnant women to identify neonates who are at risk of acquiring hepatitis B during the perinatal period.

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Hepatitis C Virus Antibody

Infectious Disease Profile

Optimal range:   0 - 0.8 index

A blood test, called an HCV antibody test, is used to find out if someone has ever been infected with the hepatitis C virus. The HCV antibody test, sometimes called the anti-HCV test, looks for antibodies to the hepatitis C virus in blood. Antibodies are chemicals released into the bloodstream when someone gets infected. Test results can take anywhere from a few days to a few weeks to come back.

Most people who get infected with hepatitis C virus (HCV) develop a chronic, or lifelong, infection. Left untreated, chronic hepatitis C can cause serious health problems, including liver damage, cirrhosis, liver cancer, and even death. People can live without symptoms or feeling sick, so testing is the only way to know if you have hepatitis C. Getting tested is important to find out if you are infected so you can get lifesaving treatment that can cure hepatitis C.

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Heptacarboxyl (7-CP)

Urine

Porphyrins, Quantitative, Random Urine, LabCorp

Optimal range:   0 - 2 ug/L

Heptacarboxyporphyrin is a Porphyrin.

Porphyrins are precursors of heme and usually only occur in urine in negligible amounts.

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Heptacarboxyporphyrin

Urinalysis

Optimal range:   0 - 2.9 mcg/g creat

Heptacarboxyporphyrin is a Porphyrin.

Porphyrins are precursors of heme and usually only occur in urine in negligible amounts.

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Heptadecanoic

Essential and Metabolic Fatty Acids Markers (RBCs)

Optimal range:   0.22 - 0.37 wt %

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.

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