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Berlin – Oropouche fever, a tropical disease transmitted by insects, is proving to be more widespread in Latin America than initially estimated, with cases now also being reported among travelers returning to Germany. Health authorities are advising caution, particularly for those planning trips to affected regions.
Since late 2023, the number of Oropouche fever infections has surged dramatically in Latin America, now exceeding 20,000 cases annually. While the exact reasons for this sharp increase remain unclear, experts suspect climatic factors play a significant role. Heavy rainfall experienced in parts of South America last year may have led to larger mosquito populations, facilitating the virus’s spread.
A recent study analyzing over 9,400 blood samples from Bolivia, Colombia, Costa Rica, Ecuador, and Peru found that 6.3 percent showed antibodies against the Oropouche pathogen, indicating past infection. However, Jan Felix Drexler, head of the Virus Epidemiology Working Group at Berlin’s Charité Hospital and co-author of the study, believes the actual number of people affected could be much higher. “We don’t know how long the antibodies last,” he noted, suggesting many past infections might go undetected.
The presence of the virus is no longer confined to the tropics. Germany’s Robert Koch Institute (RKI) reported the first confirmed cases in two returning travelers in 2024. Since then, two additional cases have been identified, including one reported in 2025, highlighting the potential for international spread through travel.
The symptoms of Oropouche fever often resemble those of other mosquito-borne illnesses like dengue or chikungunya fever. These include headache, muscle and joint pain, nausea, and diarrhea, with some patients also developing skin rashes. This similarity and the non-specific nature of the symptoms make diagnosis challenging. While most cases are relatively mild, severe illness can occur in rare instances, potentially leading to death. Currently, there is no specific vaccine or treatment available for Oropouche fever.
In light of the situation, the RKI strongly advises travelers heading to Central and Latin America to take consistent precautions against insect bites. Recommended measures include wearing long clothing, applying insect repellent diligently, and sleeping under fine-mesh mosquito nets.
A specific warning has been issued for pregnant women. Both the RKI and the German Federal Foreign Office advise pregnant individuals to carefully consider the necessity of travel to outbreak areas. Preliminary evidence suggests a possible link between Oropouche infection during pregnancy and an increased risk of fetal malformations, pregnancy complications, and even miscarriage. Investigations into these potential risks are ongoing.
Disclaimer: This news article is based on information provided regarding Oropouche fever cases, study findings, expert opinions, and public health advisories. It aims to summarize the key details presented in the source material.
https://www.fr.de/panorama/virus-faelle-auch-in-deutschland-gefaehrliches-fieber-weiter-verbreitet-als-gedacht-93687525.html
https://www.fr.de/panorama/virus-faelle-auch-in-deutschland-gefaehrliches-fieber-weiter-verbreitet-als-gedacht-93687525.html
