Health officials in California have confirmed that a South Lake Tahoe resident tested positive for the plague, the centuries-old disease that killed millions during the Black Death. The individual is believed to have contracted the infection after being bitten by an infected flea while camping near the Lake Tahoe Basin. According to El Dorado County Public Health, the patient is receiving care and recovering at home.“Plague is naturally present in many parts of California, including higher-elevation areas of El Dorado County,” said Kyle Fliflet, the county’s acting public health director. “It’s important that individuals take precautions for themselves and their pets when outdoors, especially while walking, hiking and camping in areas where wild rodents are present.”Though most people associate the plague with medieval Europe, the bacterium that causes it—Yersinia pestis—still circulates in parts of the United States. The Centers for Disease Control and Prevention (CDC) estimates an average of seven human cases occur each year nationwide.Most of these cases are sporadic, linked to fleas feeding on infected wild rodents such as ground squirrels and chipmunks. California, Arizona, New Mexico, and Colorado report the majority of cases. While the disease is now treatable with common antibiotics, untreated infections remain dangerous and potentially fatal.In El Dorado County, plague activity is not unusual. State monitoring programs have detected Y. pestis exposure in at least 45 wild squirrels and chipmunks in the Lake Tahoe Basin since 2021. Most recent human case of plague in the region occurred in 2020 and was due to flea exposure.How The Plague Spreads?Most common way of transmission is by being bitten by an infected flea, but people can also get infected through handling infected animals or less commonly from pets like cats and dogs that are infested with fleas. There are three main forms of plague.Bubonic plague – Most frequent, resulting from flea bites. The signs and symptoms are painful, swollen lymph nodes (buboes), fever, chills, headache, and weakness.Septicemic plague – What happens when bacteria multiply in the blood, leading to bleeding beneath the skin, pain in the abdomen, and shock.Pneumonic plague – Rarest but deadliest variety. It occurs when infection reaches the lungs and can be spread person to person through respiratory droplets.More than 80% of U.S. cases are bubonic. If diagnosed early, antibiotics such as streptomycin, doxycycline, or ciprofloxacin can cure the disease. Without treatment, however, mortality remains high.The term "plague" usually brings to mind the Black Death that caused an estimated 25 million deaths in Europe in the 14th century. That epidemic spread quickly from rat and flea populations in densely populated cities.In the United States, the most recent rat-to-human plague outbreak took place in Los Angeles in 1924–1925. Since then, cases have been mostly confined to rural settings where people come in contact with wild rodents.Only last month, an Arizona patient succumbed to pneumonic plague, highlighting that though unusual, the illness remains dangerous, especially when diagnosis is late.How Did Lake Tahoe Become A Hotspot for PlagueLake Tahoe’s mix of wilderness, high elevation, and rodent populations makes it one of California’s plague monitoring hubs. The California Department of Public Health (CDPH) routinely tests rodent populations, especially ground squirrels and chipmunks, for signs of Y. pestis exposure.Officials stress that the presence of plague in wildlife does not mean widespread human danger. Instead, it highlights the importance of preventive measures for campers, hikers, and residents. Recommended precautions include:Using insect repellent containing DEET when outdoorsWearing long pants tucked into boots to minimize flea exposureAvoiding contact with wild rodents, dead animals, or their burrowsNever feeding squirrels or chipmunksKeeping pets leashed or at home, and treating them with flea preventionThe South Lake Tahoe patient’s infection is believed to stem from a flea bite during a recent camping trip. Local health officials are investigating the case and have issued public advisories to remind residents and visitors about safety practices.While the patient’s identity has not been disclosed, officials confirmed that they are receiving proper medical care and are expected to recover. The case has sparked renewed efforts to remind the public that while plague is rare, awareness is essential.Is Plague Still A Cause Of Concern?Globally, plague continues to cause outbreaks, particularly in parts of Africa, Asia, and South America. The World Health Organization reports several hundred cases per year, with Madagascar being one of the most affected countries.In the United States, where public health infrastructure and antibiotics are readily available, cases are usually isolated and treatable. Still, experts say that ignoring plague entirely would be a mistake. Rodent populations are reservoirs for the bacterium, and climate change, increased outdoor recreation, and human encroachment into wildlife habitats may increase opportunities for transmission.The South Lake Tahoe case is a reminder that ancient diseases are not fully relegated to history books. But unlike the Middle Ages, modern medicine provides effective tools to treat and contain outbreaks.For residents and visitors, the takeaway is practical rather than alarmist: enjoy the outdoors but take precautions. For health authorities, it is a call to continue surveillance, public education, and rapid response when rare cases occur.As Kyle Fliflet put it, “Plague is naturally present in many parts of California…It’s important that individuals take precautions for themselves and their pets when outdoors.”