Key Points

Tuberculosis

• With 1,769 cases reported in 2023, the number of tuberculosis cases diagnosed among residents of Île-de-France increased by 21% compared to 2022. This increase was observed across all departments in Île-de-France and across all age groups except the youngest (0–4 years). Île-de-France (19% of the French population) thus accounted for 36.4% of the 4,866 cases reported in France in 2023.

• The number of multidrug-resistant tuberculosis cases in Île-de-France remained stable, with 27 cases reported by the CNR (representing 1.5% of cases in the region).

Treatment Outcomes

• The number of treatment outcomes reported in 2023 (tuberculosis cases reported in 2022) remained low, at around 29%, and ranked among the regions with the lowest reporting rates for treatment outcomes. The national average was 48%. Ninety-five percent of these outcomes were reported via electronic reporting.

Latent Tuberculosis Infections

• The number of latent tuberculosis infections (LTIs) reported in 2023—589 cases—increased sharply compared to 2022 (+33%). Of these LTI cases, 387 (66%) involved young people aged 15 to 17, many of whom were unaccompanied minors (MNA).

Surveillance Systems

• The proportion of mandatory electronic reports (or tele-reports) for all associated notifications (notifications of active tuberculosis, notifications of latent tuberculosis infections, and notifications of treatment outcomes) was 20.1% in 2023, significantly lower than the tele-reporting rate in France outside the Île-de-France region, which stood at 60.8%. The first three quarters of 2024, however, showed an encouraging increase in tele-reported cases.

• Since the completeness of the DO relative to the actual number of cases has not been reassessed for several years, a new national completeness study is scheduled for 2025.

• Public health officials need the support of clinicians, microbiologists, and other frontline workers to strengthen electronic reporting and surveillance, which guide public health control measures.