Effect of antituberculous therapy on uveitis associated with latent tuberculosis

Purpose: To describe the clinical features of patients with uveitis associated with latent tuberculosis (TB) and examine the effect of anti-TB treatment (ATT) on uveitis outcome. Design: Retrospective cohort study. Methods: One hundred ninety-nine eyes of 129 patients diagnosed with uveitis associated with latent TB were evaluated for recurrence of disease following treatment. Eighty-nine of the patients (69%) received ATT and information was gathered retrospectively regarding clinical outcome, vision, and treatment. Outcome measures included best-corrected visual acuity (BCVA) and rate of disease recurrence. Results: This study included 89 patients (69%) who received ATT and 40 patients who did not. The uveitis was treated with local and systemic anti-inflammatory and immunosuppressive therapy in all patients. The mean change in BCVA following treatment was 4.5 ± 1.4 letters over the follow-up period, with no difference between eyes of patients receiving ATT and those who did not. Sixty-eight eyes (34.9%) had a recurrence of uveitis (0.64 ± 0.08 recurrences per year), with eyes of patients receiving ATT less likely to develop a recurrence compared to those not receiving ATT (29.5% vs 48.2%, odds ratio 0.47, 95% confidence interval 0.29-0.77, P =.003). Eyes treated with ATT recurred at an estimated median of 120 months, compared with 51 months in eyes with no treatment (P =.005). Conclusions: Treatment with ATT halved the risk of uveitis recurrence and delayed the onset of the first recurrence in eyes with uveitis associated with latent TB.