Epidemiological Situation

Since the beginning of 2018, 2,598 biologically confirmed or probable cases of dengue have been reported by private and hospital laboratories in Réunion, including 1,407 cases in April. The only serotype identified in 2018 is DENV-2 (817 genotypes). This situation follows an unusual, low-level viral circulation during 2017, when persistent transmission was observed during the southern winter.

In week S2018-17 (April 23–29):

• 356 probable or confirmed dengue cases were diagnosed through laboratory testing, based on the date of symptom onset.

• Confirmed and probable cases were mainly located: - In the west: St-Paul, Gare routière, and Etang (74 cases), Bois de Nèfles and La Plaine (45 cases), St-Gilles-les-Bains (36 cases), Le Port (39 cases), La Possession (26 cases), St-Leu (24 cases), St-Gilles-les-Hauts (13 cases), La Saline (9 cases), - In the south: St-Pierre (20 cases), Ravine des Cabris (19 cases), and Le Tampon (8 cases), - In the north: Saint Denis (3 cases), Sainte Clotilde (2 cases), La Montagne (2 cases).

Over the past few weeks, cases have also been confirmed in new municipalities, including in Week 17: 6 cases in Etang Salé, 6 cases in St. Louis, 5 cases in St. Joseph, 4 cases in Trois Bassins, 3 cases in Les Avirons, and 2 cases in Sainte-Marie.