Bourbon Virus Detected in New York: First Case Confirmed by Stony Brook

Origins and Spread of Bourbon Virus

Bourbon virus was first identified in 2014 in Bourbon County, Kansas, where the initial known patient died from the infection. Since then, only six human cases have been officially reported, primarily in the central United States. Symptoms include fever, fatigue, rash, headache, body aches, nausea, and vomiting.

The lone star tick, which serves as the suspected vector, is an aggressive, reddish-brown arachnid. Adult females are distinguishable by a prominent white dot on their backs. According to the Centers for Disease Control and Prevention (CDC), nymphs and adult females are most likely to bite humans and transmit disease. Once concentrated in the southern US, the species has now spread across much of the eastern United States and has been documented as far north as Maine. Beyond Bourbon virus, lone star tick bites can transmit ehrlichiosis, Heartland virus disease, tularemia, southern tick-associated rash illness, and alpha-gal syndrome, a red meat allergy.

Expert Warnings and Diagnostic Challenges

Dr. Luis Marcos, a Stony Brook Medicine professor and director of its Tick-Borne Disease Clinic, emphasized the difficulty of identifying cases. "There are a lot of lone star ticks in New York and in the Northeast. We have dense populations, and when someone is infected with Bourbon virus, the symptoms are similar to those of other tick-borne infections," Dr. Marcos said. "For these reasons, the Bourbon virus is likely more prevalent than we think in our region, and other cases are likely going undiagnosed."

No commercial diagnostic test currently exists for Bourbon virus. Suspected samples in New York must be forwarded to the state Department of Health for specialized laboratory analysis. Researchers argue that without identifying the cause of infections, the chances of developing accurate diagnostic tests or effective treatments "are minimal."

What Comes Next

Researchers at Stony Brook Medicine have called for expanded surveillance and testing across the region, warning that Bourbon virus "could soon begin to complicate diagnoses if it becomes more prevalent this summer and in coming years." Public health authorities have not yet announced new screening protocols, and the development of a commercial diagnostic test or targeted treatment remains a long-term goal rather than an immediate prospect.