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Oropouche virus - Tropical arbovirus
The Oropouche virus causes febrile tropical infections with flu-like symptoms. Transmitted by mosquitoes, without vaccination or treatment - a growing risk in South America.
Things worth knowing about "Oropouche virus"
Oropouche virus (OROV) belongs to the genus Orthobunyavirus within the Peribunyaviridae family and is mainly transmitted to humans by mosquitoes (e.g. Culicoides paraensis) and occasionally also by certain species of midges.
It is a so-called arbovirus (arthropod-borne virus), which has been observed in increased outbreaks in South America, particularly in Brazil, Peru, Panama and Trinidad. The disease it causes is known as Oropouche fever and is not considered fatal, but highly infectious. Typically, the symptoms appear suddenly and flu-like, including fever, severe headache, muscle aches, joint pain, nausea, chills and sensitivity to light. Some patients experience a relapse of the fever after the initial symptoms have subsided - a so-called biphasic course. In rare cases, meningitis-like neurological complications have also been reported, particularly in immunocompromised individuals.
The incubation period is usually 4 to 8 days. A specific antiviral therapy does not yet exist. Treatment is purely symptomatic, with a focus on reducing fever, fluid intake and physical rest. As the virus circulates in tropical regions, mosquito protection (repellents, mosquito nets, clothing) plays a key role in prevention. The Oropouche virus is considered a potential candidate for future major outbreaks, as it can circulate epidemically in densely populated regions through mosquitoes. A vaccine is not yet available, but is being intensively researched.
Important characteristics of the Oropouche virus:
- Transmission by biting midges (Culicoides spp.)
- Symptoms: Fever, headache, myalgia, nausea, possibly. Relapsing fever
- Common in South America, often in urban tropical regions
- Treatment purely symptomatic, no vaccine available
- Increasing importance for travel medicine and tropical medicine
Literature
- Pinheiro, F. P. et al (1981). ""Oropouche virus. A review of clinical, epidemiological, and ecological findings."" American Journal of Tropical Medicine and Hygiene.
- Nunes, M. R. T. et al. (2005). ""Oropouche virus: clinical, epidemiological, and molecular aspects."" Journal of Clinical Virology.
- Romero-Alvarez, D. & Escobar, L. E. (2018). ""Potential distribution of Oropouche virus in the Americas."" PLoS Neglected Tropical Diseases.
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