An unnamed chikungunya-infected tourist from south India is responsible for the spread of the tropical disease in a small north Italian town, according to health officials who now anticipate that the disease could soon surface in Britain and turn into an epidemic across Europe.
In August, Italy's ministry of health confirmed at least 200 cases of chikungunya in the Ravenna region. British travellers to the region have been told to protect themselves against mosquito bites.
The European Centre for Disease Control has advised pregnant women and those with serious illnesses to avoid the region.
According to researchers and health officials, the man from south India was the possible source of the virus, which started spreading in July in the hamlet of Castiglione in the Ravenna province. The man was bit by mosquitoes while he was staying with relatives there.
The virus reportedly spread to four other people in the house where he was staying. The virus soon spread from there. Regional health official believe that the virus had been contained and that no travel restrictions had been imposed on residents of the region.
Health officials believe that this was the first instance that an outbreak of the disease was confirmed outside the tropics. The disease has reportedly affected many people in India, sub-Saharan Africa, the Indian Ocean region and south-east Asia.
Some scientists in Europe believe that the Tiger mosquitoes that carry the virus were imported on second-hand tyres from India, and had now moved to France, Spain, Croatia and Switzerland.