Ante brotes localizados de chikunguña y circulación sostenida de Oropouche, OPS pide fortalecer vigilancia y control vectorial en las Américas – OPS/OMS

Washington, DC, August 29, 2025 (PAHO) – The Pan -American Health Organization (PAHO) urged a strengthening, clinical management and vector control against localized outbreaks of Chikunguña these and other arbovirosis increases the risk of outbreaks, complications and docks in vulnerable populations.

According to a new epidemiological alert of PAHO, in 2025 the largest outbreaks of Chikunguaña have concentrated in South America – special in Bolivia, Brazil and Paraguay – and in the Caribbean parts. They are associated with asificus and eastern/central/south (ECSA) genotypes, which reflects an evolution of the employers observed since 2014. cases in the Indian Ocean. Areas with favorable condition for transmission.

Until August 9, 2025, 14 countries in the region report 212,029 suspicious cases of Chikunguaña and 110 deaths. More than 97% of cases concentrated in South America. In 2024, 431,417 cases and 245 deaths were notified, which represents a decrease in 2025, although with active focused outbreaks.

In parallel, in the first seven months of this and, more than 12,700 confirmed cases of ocouche have been notified in 11 countries in the region, including native cases in Brazil, Colombia, Cuba, Panama, Peru and Venezuela.

Globally, Chikunguaña has circulated in Álica, Asia and the Indian subcontinent for decades. In 2007 it was detected in Italy and in 2013 it reached the Americas. Until mid -August 2025, more than 270,000 cases, Europe, Southeast Asifico and the Western Pacific, including outbreaks in Senegal, France, India and China, had been reported. On the island, the outbreak initiated in 2024 accumulated more than 47,500 confirmed cases.

In the region, the asificus genotype predominated between 2014 and 2017. However, the presence of the ECSA genotype in at least four countries worries about its cooking with the same possible adaptation. «Understand the genetic lineages of Chikunguaña essential to anticipate transmission dynamics and guide public health interventions,» said PAHO.

The Chikunguaña maintained a seasonal pattern: in the southern hemisphere, the cases predominate in the first half of the year (rainy season), while, in Central America, Mexico and the Caribbean tend to aggregate in the second half. However, in 2025, the contribution of these subregions has been low.

In the case of Oroopouche, its historical transmission is concentrated in areas of the Amazon, but in 2024 and 2025 an expansion to previously affected previous areas has been observed. This expand underlines the need to strengthen surveillance, incorporating spatial and temporal analysis, thus geospatial tools to detect changes in the distribution of vectors and cases.

Chikunguaña is a viral cooling main transmitted by the mosquito Aedes aegypti. It causes high fever, rashes, severe muscle and joint pain, which can last months or even years and cause disability. In some cases, it can lead to serious manifestations such as shock, meningencephalitis or Guillain-Barré syndrome, with the mayor risk of death in children under 5 years, older adults, pregnant women and people with the pre-existing ones. There is no specific treatment and the focus is on avoiding bites.

The oropouche virus, meanwhile, is transmitted main to the jején CULICOIDS ParansisAlthough the mosquito Culex Quinquefasciatus It could also be involved. It causes fever, headache and muscle, and some cases neurological manifestations. There is no specific vaccine or antivirals viruses for this; The treatment is symptoms.

PAHO recommends strengthening time for cosos and eliminating mosquito crists in high -risk areas, such as schools and health centers. It also advises to improve the diagnosis, special environment in the first five days of symptoms, through molecular tests such as PCR, and train health personnel for proper management of acute and chronic cases.

In the case of Oroopouche, it is suggested included in the diagnosis of dengue diagnosis in the Prpreen Week of Knocks, and consider possible neurological complement in posterior calibers, such as meningitis or encephalitis. Up to 60% of patients could experience relapses of symptoms. Therefore, it is recommended to monitor cases and conduct research in dead cases.

Participation participation is key to reducing mosquito proliferation. It is essential to promote the use of repellent and mosquito nets, and adopt intersectoral strategies. The control of CULICOIDS Paransis Specyfic action action, such as eliminating flooding, filling or draining temporary water bodies and weeding areas around Viviekas, to reduce the breeding and resting sites of the vector.