Brazil reports mixed 2026 trends in dengue, malaria and other diseases
Health authorities in Brazil released 2026 surveillance data showing divergent patterns across the country. In Acre, confirmed meningitis cases fell to 13, a 35% decline from the previous year, with a single fatality, while dengue activity remained high with 1,838 probable cases and no deaths reported. Amazonas recorded 22,897 malaria cases in the first half of the year, a 17.9% drop from 2025, though 44% of infections were concentrated in indigenous territories.
Divinópolis in Minas Gerais confirmed 2,076 dengue infections, four deaths and one death under investigation. Goiás saw a 14% rise in dengue, totaling 93,548 infections between January and July and 75 deaths. In Mato Grosso do Sul, chikungunya claimed 28 lives – the highest toll since records began in 2015 – alongside 9,686 confirmed cases. The state also reported 4,718 probable dengue cases but no dengue deaths.
The Ministry of Health warned that El Niño could boost arbovirus transmission in Rio Grande do Norte, where dengue notifications climbed to 9,200 with 1,948 confirmed and one death. Separately, data from the national hospital system placed Acre among the states with the most viral‑hepatitis admissions, tallying 42,314 hospitalizations between 2025 and 2026. Barretos, São Paulo, recorded its first dengue death in 2026, a 36‑year‑old woman with underlying conditions.
Entities: Acre · Acre (Brazil) · Amazonas · Barretos · Brazilian Ministry of Health · Chikungunya virus · Dengue virus · Goiás · Mato Grosso do Sul · Mato Grosso do Sul (Brazil)
Claims
What the coverage asserts, and how well corroborated each claim is across sources.
- [○ 1 SOURCE] Amazonas recorded 22,897 malaria cases Jan‑Jun 2026, a 17.9% drop from 2025, with 44.12% of cases in indigenous areas. (1604de77-9ca7-46df-9a42-45a760d0b5b1)
- [○ 1 SOURCE] Acre confirmed 13 meningitis cases in 2026, a 35% decline from 2025, with one death. (e0ff16e8-2117-4cae-a966-e4e2e9aac707)
- [○ 1 SOURCE] Mato Grosso do Sul registered 28 chikungunya deaths in 2026, the highest since 2015, with 9,686 confirmed cases. (86d0c7b2-de10-44e3-b0c1-3616617da3e0)
- [● 2 SOURCES] Acre reported 1,838 probable dengue cases in 2026, of which 1,115 were confirmed and zero deaths. (8055d97f-0466-435e-a646-c9fa33fc7577)
- [○ 1 SOURCE] Divinópolis recorded 2,076 confirmed dengue cases in 2026, four deaths and one death under investigation. (c67a0905-944b-4ec7-b8a4-7b1dd09b1350)
- [○ 1 SOURCE] Goiás logged 93,548 dengue infections Jan‑Jul 2026, a 14% increase over 2025, and 75 dengue deaths in 2026. (920d38cc-f028-4845-b978-bd3a50e5c859)
- [○ 1 SOURCE] Acre recorded 42,314 hospitalizations for viral hepatitis between 2025 and 2026, among the highest in Brazil. (8cbafa7e-64ff-4111-832c-f16723d1ad6b)
- [○ 1 SOURCE] Barretos documented its first dengue death in 2026, a 36‑year‑old woman with comorbidities. (1854b09c-2be2-47e8-a099-9593f0c6628d)