CD4 and tuberculosis: Some authors found an association between defaulting from TB treatment and male sex, smoking, lymphocyte CD4 count <200 cells per mm3, low salaries, alcohol use, previous default from TB treatment, age of 35–49 years old, illiteracy and previous treatment for TB [15–18] Tuberculosis is the leading cause of death in people living with HIV, causing a great impact on the survival of this population.