Bahia registered 10,364 probable cases of chikungunya between January 4th and September 22nd of this year, an increase of 369.3% compared to the 2,187 cases recorded in the same period of 2025, according to the Bahia State Health Department (Sesab). Three deaths have been recorded.
Cases have been reported in 201 municipalities in the state, of which 22 have an incidence rate equal to or greater than 100 cases per 100,000 inhabitants. The incidence rate of chikungunya in the state reached 69 cases per 100,000 inhabitants.
Alagoinhas has the highest incidence rate among the municipalities listed by Sesab, with 2,534.18 cases per 100,000 inhabitants. Following are Rio Real, with 1,585.24, Muritiba, with 1,076.87, Teodoro Sampaio, with 686.81, and Santo Estêvão, with 558.52 cases per 100,000 inhabitants.
In total, Brazil has reported 66,592 chikungunya cases, including 53 fatalities. In addition to Bahia state, the following states have reported in excess of 10,000 cases - Mina Gerais (15,671), Mato Grosso do Sul (12,104) and Goias (11,605).