Dozens Quarantined in Siberia After Plague Institute Worker Dies

Dozens of people have been placed under quarantine in Siberia following the death of a laboratory worker employed at an institute specialising in plague research, prompting heightened health surveillance and concern over a possible infectious disease outbreak.

The worker, identified by local media as 28-year-old Darya Shipilova, was employed at the Irkutsk Anti-Plague Research Institute of Siberia and the Far East. She died after developing pneumonia, but Russian health authorities have not confirmed plague as the cause of death.

Russia’s consumer and health watchdog, Rospotrebnadzor, said the woman died from pneumonia of unknown origin and that there was no evidence linking her illness to an incident involving dangerous pathogens at the institute.

The agency said the institute had found no evidence of an accident involving the handling of infectious material, after reports circulated online claiming that Shipilova may have accidentally broken a container holding live plague bacteria. Authorities have not confirmed those reports.

Despite the uncertainty, people who had contact with the woman have been identified, examined and placed under medical observation. Parts of the hospital in the nearby town of Shelekhov where she was treated have also been placed under quarantine.

Some reports have suggested that the number of people potentially exposed could be considerably higher than the initial descriptions of dozens. The Washington Post reported that unconfirmed Russian accounts put the number of contacts between 90 and 200, while stressing that the figures had not been independently verified.

Russia’s health watchdog chief, Anna Popova, travelled to the Irkutsk region for an emergency meeting as officials sought to establish the circumstances surrounding the death.

Irkutsk Governor Igor Kobzev said no new cases among employees of the Anti-Plague Institute had been identified in the days following the woman’s illness. He said all known contacts had been traced and were under medical supervision, adding that the situation was under control.

The case has nevertheless generated considerable concern because the Irkutsk institute specialises in dangerous infectious diseases, while plague is naturally present in parts of Siberia. The bacterium that causes plague, Yersinia pestis, circulates among small wild mammals and their fleas in the region. Human infections are rare in Russia.

Pneumonic plague is one of the three main forms of plague and can spread through respiratory droplets. It can become fatal rapidly if untreated, but the disease is treatable with antibiotics when diagnosed promptly.

The United States is also monitoring the situation. US Secretary of State Marco Rubio said Washington was following reports of the death but said he did not believe the case was currently cause for alarm. US officials have said they need more information before determining whether the incident presents any significant international threat.

The Russian authorities have urged people to remain calm, insisting that there is currently no evidence of an outbreak or of a laboratory accident. Investigations and medical monitoring are continuing as officials work to determine what caused the worker’s illness and whether any additional infections have occurred.