Plague Fears Rise After Russian Lab Worker Dies

• Laboratory technician Darya Shipilova, 28, died on October 2 after developing severe pneumonia.

• Nearly 200 people linked to the case have been placed under medical observation, with no confirmed plague infection among them.

• Russian health authorities say Shipilova had pneumonia of unknown cause and that no microorganisms linked to her professional work were found.

A death at an anti-plague research institute in Siberia has triggered quarantine measures and medical monitoring after reports that a laboratory worker may have been exposed to the bacterium that causes pneumonic plague.

Darya Shipilova, 28, a laboratory technician at the Irkutsk Anti-Plague Research Institute, died on October 2 at a hospital in the nearby city of Shelekhov after developing severe pneumonia.

Local media reported that Shipilova may have accidentally broken a test tube containing the plague pathogen while working at the institute on September 25. However, Russian health authorities have not confirmed that a laboratory accident occurred or that she contracted plague.

Russia’s public health watchdog, Rospotrebnadzor, said Shipilova was diagnosed with pneumonia of unknown cause. The agency also said testing found no microorganisms associated with her professional activities in her body.

The agency said the sanitary and epidemiological situation in the Irkutsk region and the cities of Irkutsk and Shelekhov remains stable.

Nearly 200 Under Observation

Authorities have identified around 197 people who may have had contact with Shipilova and placed them under medical observation.

Officials have said those under observation have shown no signs of illness linked to plague and that initial tests did not confirm the disease. Reports also indicate that several hospitals in the region have introduced temporary quarantine measures.

Preventive measures have also been introduced at the Irkutsk Aluminium Plant in Shelekhov, where masks were made mandatory as a precaution.

Conflicting Accounts

The circumstances surrounding Shipilova’s illness remain unclear.

Reports of a possible laboratory exposure emerged after her death, while officials have disputed the claim that an accident involving pathogenic microorganisms occurred at the institute.

Alexey Tsydenov, head of neighbouring Buryatia, initially said that a woman in the Irkutsk region had died of plague, but later amended his statement to say she had possibly died from the disease.

The conflicting accounts have fueled concern among residents, while Russian authorities continue to stress that there is no confirmed plague outbreak.

International Monitoring

The case has also attracted international attention.

A US administration official told Axios that the White House is monitoring the situation, while the US State Department said Washington is following developments with the Centers for Disease Control and Prevention and other agencies.

Pneumonic plague is caused by the bacterium Yersinia pestis and can spread through respiratory droplets. It can be life-threatening but is treatable with antibiotics when detected and treated promptly.

For now, however, the central question remains unanswered: what caused Shipilova’s pneumonia and death? Russian authorities continue to investigate while precautionary measures remain in place.