As of March 2021, Haemaphysalis longicornis has been positively identified in which state?

• A. New Jersey
• B. Arizona
• C. California
• D. Texas

Answer: (A)

This question checks knowledge of the initial introduction of Haemaphysalis longicornis, the Asian longhorned tick, into the United States and how its presence was first established in public health surveillance. Haemaphysalis longicornis was first identified and confirmed in the United States in 2017 in New Jersey. This detection is well documented and widely cited, marking the moment the tick became part of U.S. surveillance data. While the tick has since been found in other states, the earliest positive identification remains New Jersey, which is why it is the correct answer for the question as of March 2021.