US is watching Russia plague scare. Should India worry?

A suspected pneumonic plague case in Russia has triggered quarantine measures in the country, and the US is watching the development closely. Here is what the case from Siberia means, how pneumonic plague spreads, and whether India should be worried.

A disease once associated with medieval Europe has suddenly returned to the headlines from Siberia. The US is monitoring a suspected case of pneumonic plague in Russia, while India, which witnessed its last major plague outbreak in 1994, is now facing a worrying question that should it be concerned too? The question resurfaced after 28-year-old laboratory worker Darya Shipilova died following severe pneumonia, prompting quarantine measures, contact tracing and international scrutiny.

The Russian woman who died of the infection worked at an anti-plague research institute and reportedly might have been exposed to plague bacteria. Nearly 200 people have reportedly been placed under medical observation, while hospitals in the region have faced quarantine measures.

Yet there is a crucial caveat — Russian authorities have not confirmed that the woman had the plague. The country's medical officials have described her illness as pneumonia of unknown cause and said tests did not detect microorganisms linked to her professional work.

The uncertainty has not stopped other countries from tracking developments. US Secretary of State Marco Rubio on Tuesday said Washington is monitoring the situation, citing concerns that an infection might have spread within the Russian facility.

So, should India be worried about pneumonic plague? And what would have to happen for a suspected case in Russia to become an international public-health concern?

THE PLAGUE SCARE THAT HAPPENED IN RUSSIA

The case centres on the Irkutsk Anti-Plague Research Institute in Siberia.

The researcher, identified in reports as Darya Shipilova, was admitted to hospital on September 29 after developing severe pneumonia. She was placed on a ventilator but died two days later.

Reports — mainly those of Western news outlets — have alleged that she might have been exposed to plague bacteria while working at the institute. One report said she told medical staff that she had accidentally broken a test tube containing live bacteria. She had reportedly become ill while on a field expedition in neighbouring Buryatia, near Russia's border with Mongolia.

However, this account has not been established by Russian authorities.

Russia's public-health watchdog, Rospotrebnadzor, has called the illness pneumonia of unknown cause and said no microorganisms associated with the woman's professional activities were detected in her body. Authorities have also said there was no evidence of an accident involving dangerous pathogens.

At the same time, the woman's contacts were traced and placed under medical supervision. Reports said nearly 200 people were quarantined at the hospital where she was treated. Three hospitals were also reported to have been placed under quarantine measures so far.

Officials have stressed that there is no evidence of a wider outbreak. Irkutsk Governor Igor Kobzev said identified contacts were under medical supervision and none had developed symptoms, while their laboratory test results were negative.

Russia's chief state sanitary doctor, Anna Popova, travelled from Moscow to Siberia to oversee the response. Kobzev said she participated in an emergency meeting of the regional sanitary and anti-epidemic commission after officials received information about a suspected case of a "particularly dangerous infectious disease".

The suspected disease was not initially named by officials.

WHY IS THE US WATCHING THE PLAGUE CASE CLOSELY?

US President Donald Trump said Washington is watching closely the death of a Russian lab technician who died at a plague research centre in Siberia. US officials on Tuesday said they are tracking the case "hour by hour" and stressed that Russia must share more information.

Trump said Washington was willing to extend assistance to Russia over the case, but stopped short of detailing what that help might entail.

The episode has attracted attention in Washington because of the possibility, however unconfirmed, that an infection could have spread inside the research facility.

US Secretary of State Marco Rubio said Washington was closely monitoring the situation, while making clear that the information available to the US came from Russian officials.

"We know what we know, obviously, about whatever the Russians have provided, which is it seems that there was a worker at the lab that was infected, and there's concern that that could have spread, at least internally," Rubio said.

He also pointed to the potential consequences if an infection were to escape its original setting.

"There's very limited travel between the US and Russia, obviously. But like anything else, something like that gets out, it could quickly spread," he said.

Rubio did not say that plague had been confirmed or that transmission had been established. He also did not provide details about how many people were affected by the quarantine measures.

The US is monitoring the reports because of the circumstances surrounding the case, not because a pneumonic plague outbreak has been confirmed.

SHOULD INDIA BE ALERT OVER A PLAGUE OUTBREAK?

India's last major plague outbreak was more than three decades ago, but that does not mean the disease can be dismissed. Any suspected outbreak still warrants close attention because the bacterium that causes plague continues to exist.

The plague re-emerged in India in 1994 after a 28-year gap. According to WHO records, 63 bubonic plague cases were reported from Mamla village and nearby areas in Maharashtra's Beed district in August and September that year. The situation became more serious when cases were reported in Surat, Gujarat. A subsequent WHO assessment recorded 876 cases and 54 deaths during the Surat episode.

The disease occurs in three main forms — bubonic, pneumonic and septicaemic plague. Of these, pneumonic plague is particularly concerning from a transmission perspective because it affects the lungs and can spread between people through respiratory particles.

The Plague is caused by Yersinia pestis, a bacterium maintained in nature among small mammals and their fleas. People can contract the infection through the bite of an infected flea or through contact with infected animals or their tissues. Pneumonic plague presents a different risk because the infection can also pass through respiratory particles from an infected person.

Pneumonic plague can become severe quickly, with symptoms including fever, chills, weakness, headache, cough, breathing difficulty and chest discomfort. However, these symptoms can also occur in several other respiratory infections, which is why laboratory testing is important when plague is suspected.

Dr Ananya Mohanty, internal medicine specialist with Manipal Hospital, Bhubaneswar, was quoted in an earlier India Today Digital report as saying, "It would be premature to call the situation a confirmed plague outbreak without appropriate official confirmation and epidemiological evidence."

That caution is relevant as plague has not been officially confirmed as the cause of the laboratory worker's death in Russia.

However, the disease is no longer the untreatable threat it once was. Antibiotics can be effective when treatment begins early, while modern surveillance, diagnostic testing and infection-control measures have significantly improved the ability to detect and manage plague.

There is currently no evidence in the material available that the Russian episode represents sustained international transmission, especially as plague itself has not been confirmed.

India, therefore, has reason to remain cautious, but not alarmed, especially as Russian authorities have quarantined contacts and launched contact tracing measures following the suspected case.

What makes caution important is the combination of an unexplained severe pneumonia, a laboratory worker at an anti-plague institute, reports of possible exposure, and the quarantine of contacts and the involvement of senior Russian health authorities.

- Ends
(Written by Anand Singh)