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Multistate Infestation with the Exotic Disease–Vector Tick Haemaphysalis longicornis — United States, August 2017–September 2018

C. Ben Beard, PhD; James Occi, MA, MS; Denise L. Bonilla, MS; Andrea M. Egizi, PhD; Dina M. Fonseca, PhD; James W. Mertins, PhD; Bryon P. Backenson, MS; Waheed I. Bajwa, PhD; Alexis M. Barbarin, PhD; Matthew A. Bertone, PhD; Justin Brown, DVM, PhD; Neeta P. Connally, PhD; Nancy D. Connell, PhD; Rebecca J. Eisen, PhD; Richard C. Falco, PhD; Angela M. James, PhD; Rayda K. Krell, PhD; Kevin Lahmers, DVM, PhD; Nicole Lewis, DVM; Susan E. Little, DVM, PhD; Michael Neault, DVM; Adalberto A. Pérez de León, DVM, PhD; Adam R. Randall, PhD; Mark G. Ruder, DVM, PhD; Meriam N. Saleh, PhD; Brittany L. Schappach; Betsy A. Schroeder, DVM; Leslie L. Seraphin, DVM; Morgan Wehtje, PhD; Gary P. Wormser, MD; Michael J. Yabsley, PhD; William Halperin, MD, DrPH
Date posted:
November 30, 2018
Publication type:

Morbidity and Mortality Weekly Report (MMWR)

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Haemaphysalis longicornis is a tick indigenous to eastern Asia and an important vector of human and animal disease agents, resulting in such outcomes as human hemorrhagic fever and reduction of production in dairy cattle by 25%. H. longicornis was discovered on a sheep in New Jersey in August 2017. This was the first detection in the United States outside of quarantine. In the spring of 2018, the tick was again detected at the index site, and later, in other counties in New Jersey, in seven other states in the eastern United States, and in Arkansas. The hosts included six species of domestic animals, six species of wildlife, and humans. To forestall adverse consequences in humans, pets, livestock, and wildlife, several critical actions are indicated, including expanded surveillance to determine the evolving distribution of H. longicornis, detection of pathogens that H. longicornis currently harbors, determination of the capacity of H. longicornis to serve as a vector for a range of potential pathogens, and evaluation of effective agents and methods for the control of H. longicornis.



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