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Scary 'New' Tick Has US Officials Worried

A species of tick native to Asia is spreading across the United States,according to a new report.

This tick, known as the longhorned tick or Haemaphysalis longicornis, was first identified in the U.S. in August 2017 when it was found on a sheep in New Jersey, according to the report, released today (Nov. 29) by the Centers for Disease Control and Prevention (CDC).

Since then, the tick has been detected in nine states: New York, Virginia, West Virginia, Arkansas, North Carolina, Pennsylvania, Connecticut and Maryland, the report said. [5 Things to Know About the New Tick Species in the US]

”The presence of H. longicornis in the United States represents a new and emerging disease threat," the report said.

In other parts of the world, longhorned ticks are known to spread diseases, including the bacterial infections babesiosis, ehrlichiosis, theileriosis and rickettsiosis, as well as certain viral diseases. In China and Japan, the longhorned tick transmits a disease called severe fever with thrombocytopenia syndrome (SFTS), which can be deadly.

But whether longhorned ticks in the U.S. can spread diseases is not known, because the types of diseases ticks spread can vary depending on their environment. So far, no cases of disease tied to these ticks have been reported in the U.S., the report said.

Officials are now working with experts in veterinary medicine, agricultural science and public health at the to better understand the potential impact of the longhorned tick in the U.S.

Indeed, the longhorned tick also poses a particular threat to livestock. Unlike most tick species, longhorned ticks can reproduce asexually, and lay massive numbers of eggs. A single female longhorn tick can lay up to 2,000 eggs at a time, the CDC said. Due to these large numbers, longhorned ticks can cause severe infestations in livestock, leading to weakness, anemia or even death in the animals.

The CDC said that critical work is needed to assess the threat of longhorned tick in the U.S. Researchers need to determine the distribution of the tick in the U.S.; the kinds of pathogens it can carry, how frequency it bites people and animals; and how to effectively control its spread.

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Originally published on Live Science.

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