Reported invasive meningococcal disease surveillance for Brazil (BRA) — ▲ Rising · 2025 — latest record 2026-10-13
As of 7 September 2026, Brazil has reported 744 invasive meningococcal disease cases in 2026, as published by SINAN. The full year 2025 closed at 1,143 cases. 2025 closed 42% above the 2023–2024 average, which is why the trend reads “Rising”.
Of the 22 countries reporting invasive meningococcal disease to ENCLAI in 2026, Brazil accounts for 34.9% of reported cases and ranks 1 by case count.
ENCLAI has logged 10,723 surveillance records for invasive meningococcal disease in Brazil in 2026, with the most detailed reporting in Oct 2026 (10,723 records). 10,723 of those arrived in the last 30 days; the case counts run to 2026-09-07. 1 distinct surveillance sources reported this pair in 2026.
Reporting authorities for these counts: SINAN — Sistema de Informação de Agravos de Notificação
One email a day: what changed in official disease reporting worldwide, with the source named for every number. Reported facts only — no forecasts and no interpretation.
| Year | Reported cases | Share of worldwide reports |
|---|---|---|
| 2023 | 754 | 48.3% |
| 2024 | 857 | 26.4% |
| 2025 | 1,143 | 24.9% |
| 2026 (year to date) | 744 | 34.9% |
Reporting bounds and case definitions vary; historical baselines are a separate comparison measure. Worldwide share compares this country's reported figure with the sum of all countries reporting invasive meningococcal disease to ENCLAI for that year. "Incomplete year" means our sources cover less than ten months of that year, so no full-year figure is shown; "outbreak total to date" is a running total since an outbreak began, not a count for one year.
| Month | Records | Reporting sources |
|---|---|---|
| Oct 2026 | 10,723 | 1 |
A record is one dated surveillance publication or one row of an official table; a month with many records is a month with detailed reporting, not necessarily more cases. 10,723 records were logged in the last 30 days.
Areas within Brazil with the most invasive meningococcal disease records this year:
| Area | Records |
|---|---|
| São Paulo | 1,008 |
| Rio de Janeiro | 850 |
| Minas Gerais | 765 |
| Rio Grande do Sul | 688 |
| Paraná | 635 |
| Country | 2026 cases | Trend |
|---|---|---|
| United States | 551 | |
| Spain | 221 | ≈ Stable · 2025 |
| Poland | 125 | ▲ Rising · 2025 |
| Australia | 103 | |
| Ukraine | 103 | ▼ Declining · 2025 |
| Disease | 2026 cases | Trend |
|---|---|---|
| COVID-19 | 441,893 | |
| Dengue fever | 385,610 | ▼ Declining · 2025 |
| Chikungunya fever | 59,714 | ▼ Declining · 2025 |
| Leprosy | 18,831 | ≈ Stable · 2025 |
| Viral meningitis (aseptic) | 2,977 | ▼ Declining · 2025 |
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One email a day: what changed in official disease reporting worldwide, with the source named for every number. Reported facts only — no forecasts and no interpretation.
