Why Are There Posters Warning of the Plague in Yosemite National Park?
Visitors to Yosemite National Park may have noticed warning signs about the plague posted around the park, including at the Mariposa Grove Welcome Plaza. While the posters might seem alarming, park rangers assure visitors they are simply routine safety reminders.
The California Department of Public Health (CDPH) explains that these signs are intended to raise awareness about the potential presence of plague bacteria, which are found throughout much of the state, including the Sierra Nevada mountains and foothills.
The warnings do not indicate any recent plague activity in Yosemite.
Although cases of plague are extremely rare, the CDPH emphasizes that it is a serious bacterial disease. If left untreated, it can progress to a fatal illness. Fortunately, the disease is treatable with antibiotics when caught early.
The bacteria that cause the plague are most commonly transmitted through contact with infected animals, such as rodents or fleas. Pets like cats and dogs can also contract the plague and potentially transmit it to their owners.
To stay safe while visiting Yosemite, avoid feeding or touching wildlife, keep pets on a leash, and use insect repellents to prevent flea bites. These simple precautions can help reduce the already low risk of encountering the disease.
