Russian Plague Lab Researcher Dies After Reportedly Breaking Test Tube as Nearly 200 People Are Monitored

A laboratory technician at an anti-plague research institute in Siberia has died after developing pneumonia of unknown cause, while Russian media reported that 197 people who may have had contact with her were identified and 189 were hospitalised for observation.

The regional publication Lyudi Baikala reported that Daria Shipilova, an employee of the Irkutsk Anti-Plague Research Institute, told medical staff that she had broken a test tube containing Yersinia pestis, the bacterium that causes plague, on 25 September.

The account has not been independently confirmed. Russia's public health agency, Rospotrebnadzor, said on 4 October that Shipilova had been diagnosed with pneumonia of undetermined aetiology. The agency said expanded testing did not identify microorganisms in her samples that were associated with her professional activities. It also said inspections had found no accident involving pathogenic microorganisms at the institute.

Reported Exposure Remains Unconfirmed

Lyudi Baikala reported that Shipilova had told medical staff about the broken test tube before her condition deteriorated. Other reports suggested that she could have been exposed during a work-related trip to neighbouring Buryatia.

Alexei Tsydenov, head of Buryatia, initially said Shipilova had died of plague. He later amended the wording of his social media post to say that the woman had 'possibly' died of the disease. Tsydenov also said Shipilova had not visited Buryatia.

The conflicting accounts have not been resolved publicly. Rospotrebnadzor has not confirmed that Shipilova had plague or that a laboratory accident occurred.

Nearly 200 People Placed Under Observation

Russian media reported that 197 people who may have come into contact with Shipilova were identified following her illness and death. Of those, 189 were reportedly hospitalised for medical observation. The reported breakdown was 114 people at one medical facility, 63 at another and 12 at the anti-plague institute.

Irkutsk regional governor Igor Kobzev said on 2 October that the identified contacts had shown no signs of illness and that laboratory results available at the time were negative. He referred to a suspected 'particularly dangerous infection' without identifying the disease.

Rospotrebnadzor subsequently said the contacts were receiving inpatient medical observation and undergoing daily laboratory testing. The agency reported two COVID-19 cases and two rhinovirus infections among those being monitored, while saying that no other infectious-disease pathogens had been detected.

The agency also said there had been no changes in the health of the contacts associated with infectious illness. Its statement did not provide further detail on the clinical significance of the four reported viral infections.

Rospotrebnadzor Reports No Laboratory Accident

Rospotrebnadzor said a biosafety commission had found no emergency involving pathogenic microorganisms at the Irkutsk Anti-Plague Research Institute. It said a separate expert commission, sent on the orders of the agency's head, reached the same conclusion.

The agency also said no other institute employee had sought medical attention for an infectious disease during the 10 days preceding its assessment.

Rospotrebnadzor said the sanitary and epidemiological situation in the Irkutsk region, including Irkutsk and Shelekhov, remained stable.

The World Health Organisation says laboratory testing is required to confirm plague infection. It identifies Yersinia pestis as the bacterium that causes the disease and says pneumonic plague can be transmitted between people through infected respiratory particles. WHO guidance also recommends monitoring close contacts of pneumonic plague cases and providing antibiotic post-exposure prophylaxis where indicated.

Those guidelines do not establish that Shipilova had plague. Rospotrebnadzor's published findings do not confirm a plague infection or a laboratory accident.

Hospitals Introduce Reported Restrictions

Maxim Modin, head of the Shelekhov district, confirmed that the inpatient ward of the district hospital had been placed under quarantine, while its outpatient clinic remained open.

Lyudi Baikala also reported three-week quarantine measures at Irkutsk City Clinical Hospitals No. 1, 3 and 10 and the Ivano-Matreninskaya Children's Clinical Hospital. Other publications subsequently reproduced the report, citing the regional news organisation. The Insider likewise reported that several Irkutsk hospitals had introduced three-week restrictions following Shipilova's death.

The reported restrictions followed the identification of people who may have had contact with Shipilova. They do not establish that she had plague or that a laboratory accident caused her illness.

Rospotrebnadzor said the monitoring and testing of contacts were continuing. Its 4 October assessment found no microorganisms in Shipilova's samples that were linked to her professional activities and no evidence of an accident involving pathogenic microorganisms at the institute.

As of the latest official assessment cited in the reports, there was no confirmed evidence that the death was caused by plague.