WASHINGTON — U.S health officials are investigating a new strain of virus linked to the death of a Kansas man who fell ill after being bitten by a tick, then went into organ failure and died about two weeks later.

The Centers for Disease Control and Prevention said Friday that it’s working with Kansas officials to find any other cases. They’ve named the virus “Bourbon” after the county where the man lived.

The pathogen belongs to a group known as thogotoviruses. The Kansas man’s death is the first time a thogotovirus is known to have caused human illness in the U.S., and only the eighth time one is known to have caused symptoms in people, according to an article published Friday in the CDC’s Emerging Infectious Diseases journal.

The Kansas man was doing outdoor work in Bourbon County last year, the CDC said, when he went to the doctor after finding an engorged tick on his shoulder and falling ill a few days later. He had a fever and headache, according to the article, and was given an antibiotic commonly used against tick- borne diseases. The man’s condition didn’t improve, however; his kidney function deteriorated and he couldn’t breath on his own. On day 11 of his illness, he died.

Before he became sick, the man, who was more than 50, was considered healthy, the CDC said in the report. CDC researchers identified the virus by looking for genetic traces in the man’s blood.

The recent discovery of Heartland virus in Missouri, also possibly linked to ticks, led the CDC to say that “that the public health burden of these pathogens has been underestimated.” Next-generation sequencing, a fairly new technology that can scan blood samples for many viruses or bacteria at once, will help health researchers make similar discoveries in the future, the CDC said.