Asian Longhorned Tick (IMAGE) University of Southern California Caption The Asian Longhorned tick transmits the virus that causes severe fever with thrombocytopenia syndrome virus, or SFTS. The syndrome has a fatality rate of up to 30 percent among hospitalized patients. Credit USC file photo Usage Restrictions None License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.