[American Thoracic Society American Thoracic Society 2011 International Conference, May 13-18, 2011 • Denver Colorado - ()] C57. DIAGNOSTICS AND BIOMARKERS FOR LATENT AND ACTIVE TUBERCULOSIS - Prevalence Of Contamination Of Culture For Mycobacterium In The Diagnosis Of Pulmonary Tuberculosis And Patients Characteristics Associated With Contamination In A Reference Hospital For Acquired Immunodeficiency Disease Syndrome And Tuberculosis. Preliminary Results