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2024 Oropouche Outbreak [1]

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Date: 2024-12

For more information on Oropouche ArboNET data and limitations of these data, please visit our Current Year Data page.

*Total human disease cases include neuroinvasive and non-neuroinvasive disease cases. Neuroinvasive disease occurs when the virus causes inflammation of the brain (encephalitis) or inflammation of the tissues around the brain (meningitis).

Why Oropouche is of concern

Oropouche virus is an emerging virus in the Americas. The virus is spread to people by infected biting midges and some mosquito species.

Oropouche is occurring outside the Amazon basin in areas where it hasn't previously been found.

Several deaths have been reported in people with Oropouche.

Infection during pregnancy has been associated with fetal death and possible birth defects.

Oropouche in pregnancy

Oropouche virus can be passed from a pregnant person to their fetus.

This type of spread has been associated with poor pregnancy outcomes such as fetal deaths, stillbirths, and birth defects.

The risk of an infected pregnant person passing the virus to their fetus is not currently known.

CDC is working to understand the potential risks of Oropouche during pregnancy and will share updates as we learn more.

Keep Reading: Complications of Oropouche and Pregnancy

Possible sexual transmission of Oropouche

A recent scientific report describes the first time Oropouche virus was found in semen of a patient who had Oropouche, which raises concern about the possible risk of sexual transmission. Other viruses (like Zika and Ebola viruses) in semen have been associated with sexual transmission of other infectious diseases. No cases of sexual transmission of Oropouche virus have been reported.

CDC has interim recommendations for male travelers and all travelers to areas with a Level 1 or 2 Travel Health Notice for Oropouche to prevent possible transmission during sex.

Keep Reading: Preventing Oropouche

Likelihood of spread to United States

Continental United States

Although the likelihood of Oropouche spreading widely in the continental United States is low because of differences in climate, types of biting midges and mosquitoes, and lifestyles (such as the use of air conditioning), some cases may occur in limited areas.

CDC continues to evaluate the possibility of spread in the continental United States and we will update as we know more.

U.S. territories, such as Puerto Rico and U.S. Virgin Islands

It is unknown how widely Oropouche virus could spread in Puerto Rico and U.S. Virgin Islands.

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[1] Url: http://www.cdc.gov/oropouche/outbreaks/2024/index.html

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