Central Idea
- Europe is currently experiencing a heatwave and wildfires, leading to concerns about the spread of viruses that are typically not found in colder climates.
- The WHO has issued an alert regarding the Crimean-Congo haemorrhagic fever (CCHF), a potentially fatal infection transmitted by ticks.
What is CCHF?
- CCHF is a viral haemorrhagic fever primarily transmitted by ticks.
- It can also be contracted through contact with viraemic animal tissues during animal slaughter.
- CCHF outbreaks can lead to epidemics with a high case-fatality ratio (10-40%) and pose challenges for prevention and treatment.
Transmission and Hosts
- The virus exists in the tick family of insects.
- Animals such as cattle, goats, sheep, and hares serve as amplifying hosts for the virus.
- Humans can contract CCHF through contact with infected ticks or animal blood.
- The virus can also be transmitted between humans through contact with infectious blood or body fluids.
- Migratory birds can host ticks, allowing the virus to spread over long distances.
Symptoms and Treatment
- Common symptoms of CCHF include fever, muscle aches, dizziness, neck and back pain, headache, sore eyes, and sensitivity to light.
- Early symptoms may also include nausea, vomiting, diarrhea, abdominal pain, and sore throat, followed by mood swings and confusion.
- Later stages may involve sleepiness, depression, and lassitude.
- There is no vaccine available for CCHF in humans or animals, and treatment focuses on managing symptoms.
- The antiviral drug ribavirin has been used to treat CCHF infection with some apparent benefit.
Spread of CCHF in Europe
- CCHF is endemic to Africa, the Balkan countries, the Middle East, and parts of Asia.
- In 2016, Spain reported the first fatality from CCHF in Europe.
- Scientists warn that CCHF, which can have a fatality rate between 10% and 40%, is spreading northward and westward in Europe.
- Cases of CCHF have been reported in Spain, Russia, Turkey, and the UK.
Reasons for this spread
- Disrupted temperature patterns due to climate change are creating favorable conditions for pathogens.
- CCHF ticks are moving northward through Europe due to longer and drier summers caused by climate change.
- Climate change contributes to the spread of diseases by expanding tick habitats, altering water habitats, and facilitating the movement of animals and human interactions.
