Health Surveillance in French Guiana. Bulletin of September 11, 2025.

Key Points

Dengue

  • Over the past two weeks, dengue activity in the region remained low, with a total of 8 confirmed cases (4 in week 35 and 4 in week 36). Of these, 3 were from the Western Coast, 3 from the Savanes sector, and 2 from Cayenne Island (the latter two cases constituted an outbreak). The serotype identified was exclusively DENV-2.

  • Since the beginning of the year, 266 cases of dengue have been confirmed in French Guiana, an average of 7 per week. Of these, 134 were from the Savanes sector, 55 from the Western Coast, 30 from Cayenne Island, 9 from Maroni, 1 from the Eastern Interior sector; the location was undetermined for 31 cases, and 6 were residents outside French Guiana. Of the 181 samples serotyped, 98% were DENV-2.

Malaria

  • The number of malaria cases diagnosed in the healthcare system over the past two weeks remained low, with 1 case (1 in S35 and 0 in S36, vs. 5 in total in S33 and S34). This was a case of P. falciparum imported from the African continent.

  • In total, 112 malaria cases have been recorded since the beginning of the year. Malaria activity has been declining since July. Most infections occurred in gold-mining areas.

Acute respiratory infections

  • Influenza activity remains low and stable throughout the country.

  • The bronchiolitis outbreak has been declining for several weeks, reaching a low level of activity. The end of the outbreak was declared this week.

  • Although COVID-19 activity remains low in French Guiana, a slight increase in emergency room visits at the three hospitals for this reason has been recorded in recent weeks.

Diarrhea

  • Activity is stable and moderate in the CDPSs and local hospitals, as well as in the emergency departments of the three hospitals.

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