A recent plague confirmation in South Lake Tahoe, California, marks the first human case in El Dorado County since 2020. According to El Dorado County health officials, the individual likely contracted the disease from an infected flea while camping in the South Lake Tahoe area. The patient is currently recovering at home under medical supervision. This incident serves as a critical reminder of the ongoing presence of plague in certain regions of California and the importance of taking preventive measures.
Understanding the Plague Threat
Plague is a rare but naturally occurring bacterial disease found in specific areas of California, particularly at higher elevations. While infrequent, it’s crucial for residents and visitors to understand the risks and how to protect themselves. The disease is primarily transmitted through the bites of fleas that have previously fed on infected wild rodents, such as squirrels and chipmunks.
Plague Transmission and Prevalence
The primary mode of plague transmission to humans is through infected fleas. These fleas typically live on wild rodents. When these rodents die, the fleas seek other hosts, which can include humans or domestic animals. Direct contact with infected animal tissue or fluids can also, though less commonly, lead to infection.
Since 2021, El Dorado County has been monitoring rodent populations for plague exposure. According to county health officials, at least 45 rodents in the Lake Tahoe Basin have shown evidence of exposure to the plague bacterium. In 2025 alone, four additional rodents tested positive, highlighting the continued presence of the disease in the region.
Symptoms and Diagnosis
The symptoms of plague typically manifest within two weeks of exposure. Common symptoms include:
- Fever
- Nausea
- Weakness
- Swollen lymph nodes (buboes)
Early diagnosis is critical for effective treatment. If you experience these symptoms, especially after spending time outdoors in areas known to harbor wild rodents, seek immediate medical attention. Plague is treatable with antibiotics, and early intervention significantly improves the chances of a full recovery.
Preventive Measures: Protecting Yourself from Plague
El Dorado County health officials are actively urging residents and visitors to adopt preventive measures to minimize their risk of contracting the plague. These precautions are particularly important when engaging in outdoor activities such as walking, hiking, and camping in areas where wild rodents are likely to be present. Here are key steps to take:
Avoid Contact with Wild Rodents
The most effective way to prevent plague is to avoid any contact with wild rodents, including squirrels, chipmunks, and other similar animals. Do not approach, touch, or attempt to handle these animals, even if they appear to be sick or injured.
Do Not Feed Wild Rodents
Feeding wild rodents can encourage them to congregate in areas frequented by humans, increasing the risk of flea bites and disease transmission. Avoid leaving food scraps or intentionally feeding these animals.
Flea Control for Pets
Pets, especially cats and dogs that spend time outdoors, can bring infected fleas into the home. Use appropriate flea control products on your pets regularly, as recommended by your veterinarian. This will help prevent fleas from infesting your pets and potentially transmitting the plague to you or your family.
Protective Clothing and Insect Repellent
When spending time outdoors in areas where wild rodents are present, wear long pants and sleeves to minimize exposed skin. Apply insect repellent containing DEET or other EPA-approved ingredients to protect against flea bites. Tuck your pants into your socks or boots to further reduce the risk of flea exposure.
Maintain a Rodent-Free Environment
Around your home, take steps to create an environment that is less attractive to rodents. Clear away brush, woodpiles, and other potential nesting sites. Store food in tightly sealed containers and dispose of garbage properly. If you have a rodent infestation, contact a professional pest control service to eliminate it.
Official Guidance and Reporting
Stay informed about the plague situation in your area by monitoring updates from El Dorado County health officials and other reputable sources. If you observe sick or dead rodents, report them to the local health department. This information helps officials track the spread of the disease and implement appropriate control measures. According to Times Now, Health and Me, Times of India, IBTimes UK, and Newsmax.com, awareness is key to containment.
The Importance of Vigilance
While the plague is a rare disease, its presence in California, particularly in areas like El Dorado County, necessitates ongoing vigilance and adherence to preventive measures. By understanding the risks, taking appropriate precautions, and staying informed, residents and visitors can significantly reduce their risk of contracting this disease. The El Dorado County health officials continue to monitor and provide updates as mentioned by Ground News, KCRA 3, and NBC (KYMA/KECY) to ensure public safety.
