In an update on Oropouche virus activity, the Pan American Health Organization (PAHO) yesterday said in the first four weeks of the year, 3,765 cases have already been reported from six Americas countries, most of them from Brazil. Other countries reporting local cases include Panama, Peru, Cuba, and Guyana, as well as an imported case from Canada.
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PAHO also provided an overview of activity in 2024, during which the region reported 16,239 cases from 11 countries and 1 territory. Brazil was the hardest hit country, followed by Peru, Cuba, and Bolivia. Of countries reported importingcases, the United States reported 108, all involving travel to Cuba.
The Americas region reported four deaths, three from Brazil.
Brazil confirms 5 vertical transmission instances, probes several others
Health officials in Brazil confirmed five instances of Oropouche transmission from mothers to their fetuses, resulting in four fetal deaths and one congenital abnormality. Investigations are still underway into 22 fetal deaths, 5 miscarriages, and 4 congenital anomaly cases.
Oropouche virus is spread to humans through the bite of certain midge species and possibly by some Culex mosquitoes. The illness causes febrile symptoms similar to dengue and in rare instances can lead to meningitis or encephalitis.
In 2024, the virus spread beyond typically affected areas to new regions and countries, with rising reports of poor outcomes following transmission from pregnant women to their fetuses.
“The current outbreak highlights the need to strengthen epidemiological and entomological surveillance measures, as well as to reinforce preventive measures aimed at the population,” PAHO said. It also encouraged countries to report any unusual events related to the disease, including deaths and poor pregnancy outcomes.