The purpose of this study is to determine whether a single oral dose of vitamin D given to infants prior to Bacille-Calmette-Guerin (BCG) vaccination will enhance the immune response to BCG vaccination.
Name: Vitamin D3 (cholecalciferol)
Description: BCG vaccine efficacy will be assessed by measuring the host immune response against BCG at 2 months, 6 months and one year after BCG immunization. A whole blood assay will be used to measure multiple cytokines and mycobacterial growth suppression.
Measure: Bacille-Calmette-Guerin (BCG) vaccine efficacy Time: 2 monthsDescription: Serum 25 hydroxy (OH) vitamin D levels will be measured prior to vitamin D supplementation and at 2 months, 6 months and one year after BCG immunization. The investigators will also determine whether specific host genetic variants including the Fok-I(rs2228570T/C), Bsm-I(rs1544410A/G), GC(rs2282679A/C), DHCR7(rs12785878G/T) and CYP2R1 (rs10741657A/G) polymorphisms affect baseline vitamin D levels and alter the response to vitamin D supplementation.
Measure: Effect of a single dose of 50,000 IU vitamin D3 on serum vitamin D levels Time: 2 monthsDescription: The investigators will determine whether specific host genetic variants including the Fok-I(rs2228570T/C), Bsm-I(rs1544410A/G), GC(rs2282679A/C), DHCR7(rs12785878G/T) and CYP2R1 (rs10741657A/G) polymorphisms affect the response to BCG vaccine in infants receiving either vitamin D or placebo.
Measure: Bacille-Calmette-Guerin (BCG) vaccine efficacy Time: 1 yearAllocation: Randomized
Parallel Assignment
There are 4 SNPs
The investigators will also determine whether specific host genetic variants including the Fok-I(rs2228570T/C), Bsm-I(rs1544410A/G), GC(rs2282679A/C), DHCR7(rs12785878G/T) and CYP2R1 (rs10741657A/G) polymorphisms affect baseline vitamin D levels and alter the response to vitamin D supplementation.. Bacille-Calmette-Guerin (BCG) vaccine efficacy.
The investigators will determine whether specific host genetic variants including the Fok-I(rs2228570T/C), Bsm-I(rs1544410A/G), GC(rs2282679A/C), DHCR7(rs12785878G/T) and CYP2R1 (rs10741657A/G) polymorphisms affect the response to BCG vaccine in infants receiving either vitamin D or placebo.. Inclusion Criteria: - Healthy mothers > 18 years of age - Term, healthy infants eligible to receive the Bacille-Calmette- Guerin (BCG) vaccine Exclusion Criteria: - Recent maternal history of tuberculosis (within 1 year) or active tuberculosis - Known maternal human immuno-deficiency virus (HIV) infection - Maternal fever or chorio-amnionitis - Maternal use of vitamin D, steroids or immuno-regulatory medications - Household member with active tuberculosis Inclusion Criteria: - Healthy mothers > 18 years of age - Term, healthy infants eligible to receive the Bacille-Calmette- Guerin (BCG) vaccine Exclusion Criteria: - Recent maternal history of tuberculosis (within 1 year) or active tuberculosis - Known maternal human immuno-deficiency virus (HIV) infection - Maternal fever or chorio-amnionitis - Maternal use of vitamin D, steroids or immuno-regulatory medications - Household member with active tuberculosis Tuberculosis Tuberculosis In 2000, there were an estimated 884,000 cases of tuberculosis (TB) in children with many developing severe, disseminated disease.
The investigators will also determine whether specific host genetic variants including the Fok-I(rs2228570T/C), Bsm-I(rs1544410A/G), GC(rs2282679A/C), DHCR7(rs12785878G/T) and CYP2R1 (rs10741657A/G) polymorphisms affect baseline vitamin D levels and alter the response to vitamin D supplementation.. Bacille-Calmette-Guerin (BCG) vaccine efficacy.
The investigators will determine whether specific host genetic variants including the Fok-I(rs2228570T/C), Bsm-I(rs1544410A/G), GC(rs2282679A/C), DHCR7(rs12785878G/T) and CYP2R1 (rs10741657A/G) polymorphisms affect the response to BCG vaccine in infants receiving either vitamin D or placebo.. Inclusion Criteria: - Healthy mothers > 18 years of age - Term, healthy infants eligible to receive the Bacille-Calmette- Guerin (BCG) vaccine Exclusion Criteria: - Recent maternal history of tuberculosis (within 1 year) or active tuberculosis - Known maternal human immuno-deficiency virus (HIV) infection - Maternal fever or chorio-amnionitis - Maternal use of vitamin D, steroids or immuno-regulatory medications - Household member with active tuberculosis Inclusion Criteria: - Healthy mothers > 18 years of age - Term, healthy infants eligible to receive the Bacille-Calmette- Guerin (BCG) vaccine Exclusion Criteria: - Recent maternal history of tuberculosis (within 1 year) or active tuberculosis - Known maternal human immuno-deficiency virus (HIV) infection - Maternal fever or chorio-amnionitis - Maternal use of vitamin D, steroids or immuno-regulatory medications - Household member with active tuberculosis Tuberculosis Tuberculosis In 2000, there were an estimated 884,000 cases of tuberculosis (TB) in children with many developing severe, disseminated disease.
The investigators will also determine whether specific host genetic variants including the Fok-I(rs2228570T/C), Bsm-I(rs1544410A/G), GC(rs2282679A/C), DHCR7(rs12785878G/T) and CYP2R1 (rs10741657A/G) polymorphisms affect baseline vitamin D levels and alter the response to vitamin D supplementation.. Bacille-Calmette-Guerin (BCG) vaccine efficacy.
The investigators will determine whether specific host genetic variants including the Fok-I(rs2228570T/C), Bsm-I(rs1544410A/G), GC(rs2282679A/C), DHCR7(rs12785878G/T) and CYP2R1 (rs10741657A/G) polymorphisms affect the response to BCG vaccine in infants receiving either vitamin D or placebo.. Inclusion Criteria: - Healthy mothers > 18 years of age - Term, healthy infants eligible to receive the Bacille-Calmette- Guerin (BCG) vaccine Exclusion Criteria: - Recent maternal history of tuberculosis (within 1 year) or active tuberculosis - Known maternal human immuno-deficiency virus (HIV) infection - Maternal fever or chorio-amnionitis - Maternal use of vitamin D, steroids or immuno-regulatory medications - Household member with active tuberculosis Inclusion Criteria: - Healthy mothers > 18 years of age - Term, healthy infants eligible to receive the Bacille-Calmette- Guerin (BCG) vaccine Exclusion Criteria: - Recent maternal history of tuberculosis (within 1 year) or active tuberculosis - Known maternal human immuno-deficiency virus (HIV) infection - Maternal fever or chorio-amnionitis - Maternal use of vitamin D, steroids or immuno-regulatory medications - Household member with active tuberculosis Tuberculosis Tuberculosis In 2000, there were an estimated 884,000 cases of tuberculosis (TB) in children with many developing severe, disseminated disease.
The investigators will also determine whether specific host genetic variants including the Fok-I(rs2228570T/C), Bsm-I(rs1544410A/G), GC(rs2282679A/C), DHCR7(rs12785878G/T) and CYP2R1 (rs10741657A/G) polymorphisms affect baseline vitamin D levels and alter the response to vitamin D supplementation.. Bacille-Calmette-Guerin (BCG) vaccine efficacy.
The investigators will determine whether specific host genetic variants including the Fok-I(rs2228570T/C), Bsm-I(rs1544410A/G), GC(rs2282679A/C), DHCR7(rs12785878G/T) and CYP2R1 (rs10741657A/G) polymorphisms affect the response to BCG vaccine in infants receiving either vitamin D or placebo.. Inclusion Criteria: - Healthy mothers > 18 years of age - Term, healthy infants eligible to receive the Bacille-Calmette- Guerin (BCG) vaccine Exclusion Criteria: - Recent maternal history of tuberculosis (within 1 year) or active tuberculosis - Known maternal human immuno-deficiency virus (HIV) infection - Maternal fever or chorio-amnionitis - Maternal use of vitamin D, steroids or immuno-regulatory medications - Household member with active tuberculosis Inclusion Criteria: - Healthy mothers > 18 years of age - Term, healthy infants eligible to receive the Bacille-Calmette- Guerin (BCG) vaccine Exclusion Criteria: - Recent maternal history of tuberculosis (within 1 year) or active tuberculosis - Known maternal human immuno-deficiency virus (HIV) infection - Maternal fever or chorio-amnionitis - Maternal use of vitamin D, steroids or immuno-regulatory medications - Household member with active tuberculosis Tuberculosis Tuberculosis In 2000, there were an estimated 884,000 cases of tuberculosis (TB) in children with many developing severe, disseminated disease.