Key points

Chikungunya, dengue, Zika

• Since the start of enhanced surveillance in the region, 374 cases of arboviral diseases—315 confirmed cases and 59 probable cases—have been investigated in Île-de-France, including 363 cases of dengue, 3 cases of chikungunya, 6 cases of Zika, and 2 cases of dengue/chikungunya co-infection. All of these cases were imported. Sixty hospitalizations for dengue and 2 for chikungunya have been reported. No deaths have been reported at this time.

• The dengue cases were imported from the Caribbean (250), Latin America (48), Asia (46), and sub-Saharan Africa (19); the chikungunya cases from Mali, Senegal, and Côte d’Ivoire; the 6 Zika cases from Thailand; and the co-infection cases from India. Among the cases, 326 (87%) were potentially viremic in Île-de-France, and 189 (50.1%) resided in municipalities in the Île-de-France region infested with the “tiger mosquito” (Aedes albopictus).

• A probable case of locally acquired dengue is currently under investigation and will be confirmed or ruled out in the next epidemiological update.

COVID-19

• COVID-19 Surveillance Based on Emergency Department Data (SOS Médecins & Oscour®)

  • Emergency department visits (OSCOUR) related to COVID-19 were down compared to the previous week. The proportion of SOS Médecins cases remained stable compared to previous weeks. The number of visits followed by hospitalizations continued to decline slightly in Week 38 (140) compared to the previous week (154).

• Virological surveillance (Néo-SIDEP)

  • A 12% increase in cases of infection (positive* SARS-CoV-2 samples by RT-PCR and antigen tests) in Week 38 compared to the previous week. The testing rate is 132 cases per 100,000 inhabitants.

Extreme heat, heat wave

• In week 38, the Île-de-France region was at the green alert level.

• Heat wave monitoring will continue until the end of September 2023.