Lab Worker Dies of Pneumonic Plague in Siberia as Nearly 200 Isolated
A 28-year-old laboratory worker in Russia's Irkutsk region has died of pneumonic plague following a suspected lab accident, prompting the observation of nearly 200 contacts and the quarantine of several local hospitals. Health experts stress the risk of a wider outbreak remains low, as the disease is treatable with antibiotics and controllable through standard public health measures.
A 28-year-old laboratory worker in the Irkutsk region of Siberia has died from pneumonic plague following an accident at a research facility, according to reports from independent news outlets. Nearly 200 people who may have come into contact with the woman have been placed under medical observation, and several hospitals in the area have been quarantined as a precautionary measure.
The woman is said to have died two days after being hospitalised. Pneumonic plague is the most severe form of the disease and can spread through the air when an infected person coughs. However, public health specialists emphasise that the risk of a large-scale outbreak remains low. The infection is easily treated with antibiotics and can be contained through standard surveillance and control measures.
«Plague is not a historical disease,» said Zania Stamataki of the University of Birmingham. «Human cases occur every year, including outbreaks of the pneumonic form.» The term plague generally refers to illness caused by the bacterium Yersinia pestis, which circulates in animal populations worldwide and infects more than 1,000 people annually. The most common form is bubonic plague, transmitted by flea bites and characterised by swollen lymph nodes. The bacterium can also infect the blood or the lungs, the latter known as pneumonic plague.
The exact circumstances of the lab accident remain unclear. Reports suggest it may have been caused by a broken test tube, though proper handling procedures for dangerous microbes should have prevented infection. Workers are normally required to wear protective equipment when studying such pathogens. There has also been speculation that the woman's death was caused by a modified form of plague developed for biowarfare, but no evidence supports this claim. Pneumonic plague is nearly always fatal if not treated promptly, so there is no reason to believe this strain is unusually dangerous.
«This can be controlled and stopped with appropriate surveillance and control measures,» said Simon Clarke of the University of Reading. He added that cases are usually treatable with antibiotics. Y. pestis is frequently studied in laboratories because it continues to infect animals and people, providing legitimate reasons for research.
The former Soviet Union operated a large bioweapons programme that included efforts to modify Y. pestis to resist antibiotics. Antibiotic-resistant strains have also evolved naturally, first detected in Madagascar in the 1990s. While lab-acquired infections with Y. pestis are rare, they are not impossible. «This incident warrants a full account of what happened. That account matters beyond Russia,» Stamataki said.
There is a long history of laboratory accidents leading to infections and deaths. In 2007, an outbreak of foot and mouth disease in the UK was traced to labs. In 1979, at least 68 people died of anthrax in Sverdlovsk, Russia, after what the United States claimed was an accidental release of spores from a military facility. There is, however, no evidence that the Covid-19 pandemic resulted from a lab accident.
Russia has repeatedly claimed that Ukraine is developing bioweapons with US assistance, but no evidence supports this. In 2024, it was reported that new buildings were being constructed at a former bioweapons site in Russia known as Sergiev Posad-6.
4
