A person in northern Arizona has died from a case of bubonic plague, local health officials said. The unidentified patient showed up to the Flagstaff Medical Center Emergency Department and died there the same day,

An Arizona resident has died from the “most serious” form of the plague, health officials said. The person tested positive for pneumonic plague July 11 in Coconino County, the Health and Human Services Department said in a news release. Pneumonic plague is a “severe lung infection caused by the Yersinia pestis bacterium,” health officials said.