The ticks of the genus Hyalomma are almost twice the size of the sheep ticks [ Ixodes ricinus
An unusually large adult mite was discovered on 13 July in Drenthe, a province in northeastern Holland. Hyalomma marginatum was not born in the country. Another of these ticks was hidden in the region a week earlier, officials at the National Institute of Public Health and the Environment (RIVM) said in an announcement on July 24.
Invasive newcomers can measure up to 0.2 inches (6 millimeters) long – about two times longer than the length of the more common sheep ticks ( Ixodes ricinus ) – and grows to 0.7 inches (2 centimeters) when swallowed with blood. And as ticks Ixodes sit and wait for the hosts of animals to wander close, Hyalomma ticks actively chase their hosts, hiding on the ground and then embarking on them, according to the European Center for Recreation Disease prevention and control (ECDC). [10 Important Ways to Avoid Summer Tick Bites]
Certain signals emitted by Hyalomma indicate that it is likely to eat close, among them body heat, vibrations or aromas. Ticks can visually identify a target at a distance of 30 feet (9 meters). Once the host is spotted, ticks can track them up for 10 minutes and over a hundred feet, ECDC says.
As adults, ticks prefer to feed on large mammals while nymphs target smaller victims for their blood supply. Birds are also on the menu; Parasites are thought to travel far and wide, stopping owners of their hosts – especially when these hosts migrate birds, said Alicia Bucek, a tick researcher at the Department of Biology and Parasitology at Lublin Medical University in Poland.
"The transfer of N. marginatum larvae and nymphs of long-migratory migratory birds, including intercontinental migrations, takes place during seasonal migrations of birds and reproduction," Buczek told Live Science in email. In the meantime, climate change is changing ecosystems and changing bird migration patterns, allowing ticks to colonize geographic areas where they have not previously lived, Butzek said.
Hyalomma ticks are widespread in North Africa and Asia and are also found in southern and eastern Europe. There have been sporadic observations in parts of northern Europe and Russia, but they are not believed to represent established populations, ECDC reports.
Dutch tick monitoring raised public health concerns as Hyalomma ticks are known vectors for Crimean-Congo hemorrhagic fever, a serious illness that causes fever, joint pain, vomiting and uncontrolled the American Centers for Disease Control and Prevention (CDC).
Tests show that none of the ticks carried the pathogen. for hemorrhagic fever. However, the Drenthe Mite has transmitted the Rickettsia aeschlimannii microbe which causes fever. The first sign of spotted fever is usually a dark scab that forms at the site of the bite; Symptoms include rash, fever, muscle pain and headache, but the disease can be treated with antibiotics, the CDC says.
Future doubts Hyalomma Observations in the Netherlands should be reported to the Netherlands Food and Consumer Safety Authority, RIVM officials said in a statement.
Originally published by Live Science .