Exotic ticks monitored in Sweden for unusual viruses

Sweden is on alert this summer as researchers closely monitor two exotic tick species: the bird tick and the ornate dog tick. Both species can carry viruses, bacteria, and parasites that are not native to Sweden and could pose health risks.

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It is primarily the Crimean-Congo virus, a hemorrhagic fever virus, that they can carry. It is the most serious tick-borne disease we have, so we do not want it here.

The bird tick, which arrives with migratory birds, is a particular concern due to its potential to carry the Crimean-Congo hemorrhagic fever virus. "It is primarily the Crimean-Congo virus, a hemorrhagic fever virus, that they can carry. It is the most serious tick-borne disease we have, so we do not want it here," said Anna Omazic, a senior researcher at the National Veterinary Institute.

While bird ticks typically die quickly in Sweden's climate, extreme weather periods can allow them to survive and mature. The ornate dog tick, often arriving with dogs returning from abroad or smuggled into the country, can also carry foreign pathogens. However, these are generally diseases specific to dogs and not dangerous to humans, according to Omazic.

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It is primarily diseases specific to dogs, but which are not dangerous to us humans.

Unlike the bird tick, the ornate dog tick has a good chance of establishing itself in Sweden, as its natural habitat in northern Germany has a similar climate. Researchers are also tracking the castor bean tick, which has already established itself in parts of southern Sweden, including Öland and Gotland, and may be expanding its range.

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It would probably be a tick that we have here in Sweden.