New Mexico reports first plague death of 2026 in Santa Fe County

Plague has returned to New Mexico with a death in Santa Fe County, and the risk is close enough to matter in Hidalgo County’s ranch country, back roads and desert edges. State health officials said the woman was the first human plague case reported in New Mexico in 2026, and they have already contacted close contacts while checking whether any environmental risk remains.

The New Mexico Department of Health said it will also confirm that no close contacts have symptoms consistent with plague. State public health veterinarian Erin Phipps offered condolences to the woman’s family as the department moved into follow-up monitoring. The case is a statewide alarm, but it is also a reminder for anyone who gardens, hikes, camps, hunts or works outdoors in the county’s open country, where exposure to rodents and fleas is more likely than in a city neighborhood.

Plague is caused by the bacterium Yersinia pestis and is usually spread by the bite of an infected rodent flea, or by direct contact with infected animals. In some cases it can spread to the lungs, and people with plague in their lungs can pass it through coughing. The Centers for Disease Control and Prevention says close-person transmission is rare, but it also says pneumonic plague can develop when bacteria spread to the lungs from untreated plague or when someone inhales infectious droplets from an infected person or animal. Quick treatment matters: the CDC says plague can be cured with antibiotics if it is caught early.

That urgency is part of why the numbers hit hard. New Mexico recorded three human plague cases in 2025 and one in 2024, which was fatal. The state also says three dogs have already been diagnosed with plague in 2026, after one cat and four dogs tested positive in 2025. Nationally, the CDC says an average of seven human plague cases are reported each year, and most U.S. cases occur in northern New Mexico, northern Arizona and southern Colorado. New Mexico health officials say about half of all U.S. plague cases each year occur in the state.

For Hidalgo County households, the prevention steps are practical. Avoid sick or dead rodents and rabbits, along with their nests and burrows. Clean up areas near homes where rodents live. Use insect repellent when hiking, camping or working outdoors. Ask a veterinarian about flea-control products before using them on cats and dogs, because not every product is safe for pets or children. If a pet looks sick after time outdoors, get it examined promptly. Doctors are also being told to report suspected cases quickly, because the state has a long plague history and historical county data show cases going back to 1949.