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BACKGROUND: There are no data comparing the 6-9 month oral three-drug Nix regimen (bedaquiline, pretomanid and linezolid [BPaL]) to conventional regimens containing bedaquiline (B, BDQ) and linezolid (L, LZD). METHODS: Six-month post end-of-treatment outcomes were compared between Nix-TB ( n = 109) and 102 prospectively recruited extensively drug-resistant TB patients who received an ˜18-month BDQ-based regimen (median of 8 drugs). A subset of patients received BDQ and LZD ( n = 86), and a subgroup of these ( n = 75) served as individually matched controls in a pairwise comparison to determine differences in regimen efficacy. RESULTS: Favourable outcomes (%) were significantly better with BPaL than with the B-L-based combination regimen (98/109, 89.9% vs. 56/86, 65.1%; adjusted relative risk ratio [aRRR] 1.35; P &lt; 0.001) and in the matched pairwise analysis (67/75, 89.3% vs. 48/75, 64.0%; aRRR 1.39; P = 0.001), despite significantly higher baseline bacterial load and prior second-line drug exposure in the BPaL cohort. Time to culture conversion ( P &lt; 0.001), time to unfavourable outcome ( P &lt; 0.01) and time to death ( P &lt; 0.03) were significantly better or lower with BPaL than the B-L-based combinations. CONCLUSION: The BPaL regimen (and hence substitution of multiple other drugs by pretomanid and/or higher starting-dose LZD) may improve outcomes in drug-resistant TB patients with poor prognostic features. However, prospective controlled studies are required to definitively answer this question.

the international journal of tuberculosis and lung disease/the international journal of tuberculosis and lung disease. articles traduits en français ...

Pretomanid with bedaquiline and linezolid for drug-resistant TB: a comparison of prospective cohorts