Safety and Immunogenicity of 2 Formulations of Tuberculosis Vaccine GSK692342 Given at 0,1 Months to Healthy Adults

This study will assess the safety and immunogenicity of 2 different formulations of tuberculosis vaccine GSK692342 in healthy adults.

The study is designed to have a vaccination phase (includes screening, 2 doses of vaccine 1 month apart and follow-up until 1 month post dose 2), which will be performed in an observer blinded manner. This will be followed by 3 years of follow-up which will continue in an open manner.

No new subjects will be recruited at the follow-up phase. The Protocol Posting has been updated in order to comply with the FDA Amendment Act, Sep 2007.

Eligibility Criteria:
Inclusion Criteria:

* Subjects who the investigator believes that they can and will comply with the requirements of the protocol
* A male or female between, and including, 18 and 50 years of age at the time of the first vaccination.
* Written informed consent obtained from the subject prior to any study procedure.
* Free of obvious health problems as established by medical history and clinical examination before entering into the study.
* Subjects must have PPD negative skin reactivity (0 mm induration 48 to 72 hours after PPD skin test administration).
* Clinically normal laboratory values for creatinine, alanine aminotransferase (ALT), aspartate aminotransferase (AST), complete blood count (CBC) and differential, haemoglobin, platelet count and urinalysis.
* Seronegative for human immunodeficiency virus-1 and 2 (HIV 1/2) antibodies, hepatitis B surface antigen (HBsAg), and hepatitis C virus (HCV) antibodies
* If the subject is female, she must be of non-childbearing potential, or, if of childbearing potential, she must be abstinent or have used adequate contraceptive precautions for 30 days prior to vaccination, have a negative pregnancy test and must agree to continue such precautions for two months after completion of the vaccination series.
* No evidence of pulmonary pathology (i.e. acute or chronic pulmonary disease; past TB infection/disease) as confirmed by chest X-ray.

Exclusion Criteria:

* History of previous exposure to experimental products containing components of the experimental vaccine.
* Use of any investigational or non-registered product (drug or vaccine) other than the study vaccine within 30 days preceding the first dose of study vaccine, or planned use during the study period.
* Chronic administration of immunosuppressants or other immune-modifying drugs within 6 months prior to the first vaccine dose.
* Any chronic drug therapy to be continued during the study period. Vitamins and/or dietary supplements, herbal medications, birth control pills, anti-histamines for seasonal allergies, SSRIs (e.g. Prozac, Zoloft, Paxil), NSAIDs (nonsteroidal anti-inflammatory drugs e.g. aspirin, ibuprofen), and acetaminophen are allowed.
* History of documented exposure to Mycobacterium tuberculosis.
* History of prior vaccination with experimental Mycobacterium tuberculosis vaccines.
* Administration of any immunoglobulins, any immunotherapy and/or any blood products within the 3 months preceding the first dose of study vaccination, or planned administrations during the study period.
* Participation in another experimental protocol during the study period.
* Any confirmed or suspected immunosuppressive or immunodeficient condition; or family history of congenital or hereditary immunodeficiency.
* History of hypersensitivity to vaccines or vaccine components
* History of any acute or chronic illness or medication that, in the opinion of the investigator, may interfere with the evaluation of the safety or immunogenicity of the vaccine.
* Volunteers with a personal history of autoimmune disease or who describe a first-degree relative with clearly documented autoimmune disease.
* History of any neurological disorders or seizures.
* History of chronic alcohol consumption and/or drug abuse.
* History of allergic disease or reactions likely to be exacerbated by any component of the vaccine.
* Major congenital defects.
* Pregnant female, lactating female or female planning to become pregnant or planning to discontinue contraceptive precautions.