There have been two new cases of the human plague found in Santa Fe County, New Mexico, making it now three cases in total that have been confirmed in the state this year.
The recent cases involve a 52-year-old woman and a 62-year-old woman.
According to health officials, a 63-year-old man was the first confirmed case of the plague in 2017 discovered that he is diagnosed with plague in June.
All three patients, who live in Santa Fe County, were hospitalized but there have been no deaths.
Health officials carried out health investigations around the homes of the patients to make sure there are no infections or risks.
Other signs and symptoms may include: Sudden onset of fever and chills, headache fatigue and general muscle aches.
Four cases of the plague were also reported in New Mexico in both 2015 and 2016, Fox News reports.
There are seven cases of the plague on average, according to the Centers for Disease Control and Prevention. There are also an average of seven cases of the bubonic plague recorded in the US each year. Fleas are one of the most common insect carriers of the human plague.
The plague, which is caused by a type of bacteria called Yersinia pestis, is perhaps best known for killing millions of people in Europe in the 1300s, in a pandemic called the Black Death.
However, it can also be spread through contact with rodents or dead animals. "Keeping your pets at home or on a leash and using an appropriate flea control product is important to protect you and your family".
The CDC reports that hundreds of cases have been documented over the last century in the western United States, typically in northern New Mexico, northwestern Arizona and southern Colorado.
More than a fifth of the human plague cases in New Mexico between 1949 and 2014 occurred in Santa Fe County, with 59 cases in the county out of 271 statewide.