Yavapai County health officials said Friday a county resident is suspected of having pneumonic plague, prompting an active investigation.
Contact tracing has begun to identify and notify anyone exposed because pneumonic plague infects the lungs and can spread person to person through respiratory droplets.
1 to 4 days after exposure, symptoms can escalate quickly; officials urged residents with sudden high fever, chest pain, breathing trouble or a cough with bloody or watery mucus to seek immediate care.
Standard antibiotics can treat the infection if caught early, while officials advised residents to treat pets for fleas and avoid wildlife and wild rodents as monitoring continues.