The U.S. government is closely monitoring a suspected case of pneumonic plague in Russia after a worker at an anti-plague research facility died from what Russian authorities have described as pneumonia of an unknown cause.
The case centers on the Irkutsk region of Siberia, where the woman worked at the Irkutsk Anti-Plague Research Institute. Russian health officials have quarantined the hospital where she was treated and placed people who had contact with her under medical observation.
Reports that the woman died from pneumonic plague have not been officially confirmed.
Russia’s public health agency, Rospotrebnadzor, said extensive testing found no microorganisms associated with the woman’s professional activities. The agency also said investigators found no accidents involving pathogenic microorganisms at the research institute and described the epidemiological situation in the region as stable.
Officials said the people identified as contacts of the woman have remained under medical supervision. According to regional officials, those tested have not shown evidence of plague infection.
The uncertainty surrounding the woman’s death, however, has prompted attention outside Russia.
The U.S. State Department said it is aware of reports of a fatal suspected pneumonic plague case in Irkutsk Oblast and is monitoring developments alongside the Centers for Disease Control and Prevention and other federal agencies.
The department cautioned that many details remain unconfirmed and called on Russian authorities to provide accurate information about the situation quickly and openly.
President Donald Trump said Monday that the United States would be willing to assist Russia if necessary.
“Anybody that has that kind of a problem, we’re always willing to help,” Trump told reporters, adding that his administration was examining the situation closely.
Secretary of State Marco Rubio also sought to temper concerns, saying the situation warrants close attention but does not currently constitute cause for alarm.
What is pneumonic plague?
Pneumonic plague is a severe form of plague caused by the bacterium Yersinia pestis. Unlike the more common bubonic form, pneumonic plague affects the lungs and can spread between people through respiratory droplets during close contact.
Despite its historical association with devastating epidemics, plague can now be successfully treated with antibiotics, particularly when treatment begins early.
The disease continues to occur naturally in parts of the world, including among wild animal populations. Experts say modern antibiotics and public-health measures significantly limit its potential to spread when cases are quickly identified and treated.
For now, there is no confirmed pneumonic plague outbreak in Russia. Russian officials maintain that the woman’s illness has not been linked to pathogens at the institute, while U.S. officials say they will continue monitoring the investigation as more information becomes available.
