A 27-year-old laboratory worker has died in Russia’s Siberian region after reportedly developing a severe illness suspected to be pneumonic plague, a rare but potentially fatal form of infection that affects the lungs.
She was placed on ventilator support but died on October 2, 2026, after spending several days receiving treatment. Symptoms may develop rapidly, in some cases within 24 hours of infection. Pneumonic plague primarily spreads through respiratory droplets released when an infected person coughs, sneezes or speaks.
The woman was reportedly employed at the Irkutsk Anti-Plague Institute and was admitted to a hospital in Shelekhov, near Irkutsk, with symptoms of severe pneumonia. Pneumonic plague is a severe form of plague caused by the bacterium Yersinia pestis that infects the lungs. It can spread through respiratory droplets and may become life-threatening rapidly if untreated. Bubonic plague, the more common form, primarily affects the lymph nodes and typically causes painful, swollen lymph nodes called buboes. Unlike bubonic plague, pneumonic plague directly affects the respiratory system and can spread from person to person through close contact. Plague is a zoonotic disease, meaning it can be transmitted from animals to humans. The bacteria that cause the disease are typically carried by small mammals and the fleas that infest them. As per the World Health Organization (WHO), pneumonic plague can worsen rapidly and may be fatal if treatment is not provided promptly. However, early diagnosis and timely antibiotic therapy can significantly improve the likelihood of recovery. Early recognition is crucial, as the condition can deteriorate quickly. Close, prolonged contact with an infected individual can increase the risk of transmission. The disease can also develop when the bacterium Yersinia pestis spreads to the lungs from another form of plague. Unlike bubonic plague, pneumonic plague can spread directly from person to person. Prompt diagnosis and antibiotic treatment are essential to prevent further transmission and serious complications. Respiratory failure: Severe lung infection can make it difficult for the lungs to supply enough oxygen to the body. Sepsis: The infection can spread into the bloodstream, triggering a life-threatening systemic response. Septic shock: Severe sepsis can cause dangerously low blood pressure and failure of vital organs. Death: Without timely antibiotic treatment, pneumonic plague can progress rapidly and may be fatal. Treatment involves prompt administration of appropriate antibiotics, which can significantly improve the chances of recovery when started early. Patients might also require supportive care, such as oxygen or respiratory assistance, depending on the severity of the infection. Close contacts may be monitored and given preventive antibiotics when recommended.
