MOSCOW, Russia | Russian health authorities have reported no confirmed plague infections among people who came into contact with a laboratory worker who died of pneumonia of unknown origin in Siberia, as investigators continue to examine the circumstances surrounding her death and international officials seek further information.
The 28-year-old woman, identified by local media as Darya Shipilova, worked at the Irkutsk Anti-Plague Research Institute of Siberia and the Far East. She died on October 2 after developing a severe illness, prompting precautionary quarantines and renewed concerns about a possible laboratory-related infection.
Russia’s consumer health watchdog, Rospotrebnadzor, said extensive testing had found no microorganisms in the woman’s body linked to her professional activities. It also reported no infectious diseases among institute employees during the 10 days preceding its October 6 statement. Local authorities said approximately 60 percent of those placed under quarantine had been released, according to Reuters.
Rumors circulating online suggested that a laboratory accident involving live plague bacteria might have caused her illness. However, Russian authorities said they had found no evidence of an accident involving dangerous pathogens. The suspected diagnosis of plague has not been confirmed, and the cause of death remains undetermined.
The World Health Organization said it was seeking additional information from Russia. The agency previously assessed the public health risk to the general population as low based on the information available, while emphasizing the need for further assessment as details emerge. U.S. Secretary of State Marco Rubio also called on Russia to provide more information, according to Reuters and the Associated Press.
Plague is caused by the bacterium Yersinia pestis, which circulates naturally among certain wild rodents and their fleas. Although the disease remains present in parts of Siberia and other regions, human infections are relatively rare. The World Health Organization identifies three main forms: bubonic, septicemic and pneumonic plague.
Pneumonic plague affects the lungs and can spread between people through infectious respiratory droplets during close contact. It can be fatal without prompt treatment, but antibiotics are effective when administered early. Plague was responsible for the Black Death pandemic of the 14th century, one of history’s most devastating outbreaks, but modern diagnosis and treatment have substantially changed the outlook for patients.
For now, no plague outbreak linked to Shipilova’s death has been established. The investigation remains important because of the institute’s work with dangerous infectious agents, but the available evidence does not substantiate claims of a confirmed laboratory leak or widespread transmission.
The latest findings underscore the need for transparent reporting and continued monitoring while authorities establish what caused the laboratory worker’s death.
Edgardo Hernal started college at UP Diliman and received his BA in Economics from San Sebastian College, Manila, and Masters in Information Systems Management from Keller Graduate School of Management of DeVry University in Oak Brook, IL. He has 25 years of copy editing and management experience at Thomson West, a subsidiary of Thomson Reuters.
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