(DOUGLAS COUNTY, Colo.) -- Colorado public health officials are investigating the death of an adult resident as a result of hantavirus.

The Colorado Department of Public Health and Environment and the Douglas County Health Department said the death is not linked to the outbreak on the MV Hondius cruise ship, which led to 11 confirmed and probable cases, including two confirmed deaths and one suspected death.

The individual lived in Douglas County -- located just south of Denver -- but information about the patient's name, age and sex were not immediately available. 

Health officials said the individual was infected by the Sin Nombre hantavirus, which is the most common cause of hantavirus pulmonary syndrome (HPS) in North America.

HPS symptoms typically appear from one to eight weeks after contact with the virus, with early signs including fever, fatigue and muscle aches, according to the Centers for Disease Control and Prevention. Half of HPS patients will experience headaches, chills, dizziness, nausea, vomiting, diarrhea and abdominal pain.'

Between four and 10 days after the initial phase of illness, symptoms including coughing, shortness of breath and tightness in the chest can emerge, the CDC said, adding that a patient's lungs can fill with fluid.

"Hantavirus infections caused by the Sin Nombre hantavirus occur regularly in Colorado, usually in the spring and summer, and can cause a severe and sometimes deadly respiratory disease," according to public health officials. "In Colorado, the deer mouse is the rodent species that most commonly exposes people to the virus. Avoiding exposure to rodents and their urine, feces, saliva, and nesting materials is the best way to prevent infection." 

According to the CDC, there were six cases of Hantavirus in Colorado from 2020 to 2023.

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