Eligibility Details:  
        CASES: Heavy drinkers with alcoholic hepatitis
        Inclusion criteria
          1. A clinical diagnosis of alcoholic hepatitis as defined by the NIAAA pan-consortia for
             AH:
               1. Onset of jaundice (defined as serum total bilirubin >3 mg/dL) within the prior 8
                  weeks to screening visit
               2. Regular consumption of alcohol with an intake of > 40 gm daily or >280gm weekly
                  on average for women and > 60 gm daily or >420gm weekly on average for men for 6
                  months or more, with less than 8 weeks of abstinence before onset of jaundice
               3. AST > 50 IU/l
               4. AST:ALT > 1.5 and both values < 400 IU/l
               5. and/or histological evidence of AH*
          2. Serum total bilirubin >3 mg/dL
          3. Subject or guardian ability to understand and willingness to provide written consent
          4. Age greater or equal to 21 years
          5. Re-enrolment of an alcoholic hepatitis donor is permissible up to 4 times if the donor
             presents with a new episode of alcoholic hepatitis 24 weeks or longer after the most
             recent enrolment in the study
        Exclusion criteria
          1. Liver disease significantly caused by hemochromatosis, autoimmune liver disease,
             Wilson disease, and acute viral hepatitis (NOTE: The presence of chronic hepatitis C,
             hepatitis B, or HIV is not exclusion to participation)
          2. Pregnant or breast feeding
          3. Received liver transplant
          4. Based on the judgment of the investigator, subject is not capable of understanding or
             complying with the study requirements
        CONTROLS: Heavy drinkers without significant liver disease Inclusion criteria
          1. History of chronic alcohol consumption sufficient to cause liver damage. Generally,
             this is considered to be >40 g/day or >280g/week on average for women and >60 g/day or
             >420 g/week on average for men, for 6 months or more, with less than 8 weeks of
             abstinence before onset of jaundice. Judgement about chronic alcohol consumption will
             be made by the site investigator.
          2. Subject or guardian ability to understand and willingness to provide written consent
          3. Age greater or equal to 21 years
        Exclusion criteria
          1. Past evidence of alcoholic liver disease, defined as a bilirubin > 2.0 mg/dL, an AST >
             1.5 ULN, and any hospital admission for liver disease, or the presence of esophageal
             varices or ascites (at any time in the past)
          2. Liver disease significantly caused by hemochromatosis, autoimmune liver disease,
             Wilson disease, NAFLD, and acute viral hepatitis (NOTE: The presence of chronic
             hepatitis C, hepatitis B, or HIV is not exclusion to participation.)
             *Individuals with a diagnosis of Gilbert's can have total bilirubin up to 3.0 mg/dL
             and still be eligible for participation.
          3. Alcohol intake at less than 40 g/day or 280g/week on average for women and 60 g/day or
             420 g/week on average for men for longer than the past 28 days
          4. If liver stiffness has been assessed within the prior 90 days, then stiffness
             suggesting fibrosis of F1 or greater is excluded. For Fibroscan, this is a fibrosis
             score >7.0 kPa.
          5. Received liver transplant
          6. Pregnant or breast feeding
          7. Any of the following laboratory abnormalities within 90 days prior to signing the
             consent.
               1. Total bilirubin: >ULN*
               2. INR: > 1.4
        Healthy Controls
        Inclusion criteria
          1. AUDIT-C scores of <4 for men and <3 for women (signifying no alcohol misuse)
          2. Abstinent (consumption of less than one standard drink/week) during the 6 months prior
             to enrolment
          3. Ability to understand and willingness to provide written consent.
          4. Age greater or equal to 21 years
        Exclusion criteria
          1. Clinical history or laboratory evidence of liver disease including alcoholic liver
             disease, NAFLD, hemochromatosis, alcoholic hepatitis, autoimmune liver disease, Wilson
             disease, hepatitis C, or hepatitis B.
          2. Presence of diabetes (requiring treatment with oral agents or insulin).
          3. Significant heart disease (prior history of heart disease, other than hypertension)
          4. Chronic lung disease (requiring chronic treatment)
          5. Immune related conditions (such as Crohn's disease, rheumatoid arthritis, ulcerative
             colitis, systemic lupus erythematosus, severe psoriasis, etc.)
          6. Known infection with HIV
          7. Presumed infection, or use of antibiotics or other medications (e.g., corticosteroids)
             that would affect immune function, within the past 14 days
          8. BMI>35
          9. Current or known history of cancer (except in situ carcinoma of the cervix or
             adequately treated basal or squamous cell carcinoma of the skin) within 5 years prior
             to enrollment
         10. Received liver transplant
         11. Pregnant or breast feeding
         12. Any of the following laboratory abnormalities within 90 days prior to signing the
             consent.
               1. Hemoglobin: <10 g/dL
               2. Conjugated bilirubin: > ULN
               3. INR: > 1.4
               4. AST: >40 IU/mL
               5. ALT: >40 IU/mL
         13. Based on the judgment of the investigator, subject is not capable of complying with
             the study requirements