Nipah virus outbreak in West Bengal: 5 cases, 100 quarantined, no cure or vaccine in sight

File photo (Reuters)

• Five Nipah virus cases confirmed in Barasat, West Bengal; containment underway
• Nearly 100 contacts quarantined at home to prevent community transmission
• No vaccine or cure exists; strict isolation and early detection are key

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Health authorities in West Bengal are engaged in an urgent containment effort following the confirmation of five cases of the deadly Nipah virus, prompting the precautionary home quarantine of nearly 100 individuals.

The outbreak, centred around the town of Barasat near Kolkata, was first detected on Monday. The initial two patients, a male and a female nurse from a private hospital in Barasat, remain in intensive care.

A senior state health department official, cited by news agency PTI, provided a grave update on their conditions: “The condition of the male nurse is improving, but the female patient remains very critical. Both are being treated in the ICCU.” Sources at the hospital confirmed the male nurse is now clinically stable, while his colleague remains comatose and on aggressive treatment.

Subsequent testing identified three further infections among healthcare workers at the same facility — a doctor, another nurse and a health staff member. These three have been admitted to the government-run infectious diseases hospital in Beleghata, Kolkata.

In response, contact tracing operations have been swiftly expanded. As a precautionary measure, state officials have directed almost 100 identified contacts to isolate at home to prevent potential community transmission.

The Nipah virus, classified by the World Health Organisation (WHO) as a priority pathogen with epidemic potential, presents a significant public health challenge. There exists neither a vaccine to prevent infection nor a specific antiviral treatment to cure it, making early detection and strict isolation protocols the cornerstone of outbreak management.

The virus is zoonotic, meaning it jumps from animals to humans. It is harboured naturally in fruit bat and human infection typically occurs through an “accidental spillover,” explains Dr Rajeev Jayadevan, former president of the Indian Medical Association in Cochin.

In comments to The Independent, he attributed most cases to the “human-bat interface, which means consumption of fruits that could have been infected by bats.” He noted the risk is elevated in “rural and forest-adjacent areas where agricultural practices increase contact between humans and fruit bats searching for food.”

Initial symptoms are often flu-like, including fever, headache, cough and body aches, appearing within 4 to 14 days of exposure. The infection can rapidly progress to severe encephalitis, causing disorientation, drowsiness, seizures and coma, with a high fatality rate.

India has faced Nipah outbreaks with alarming regularity in recent years. The virus first emerged in South Asia during a 1998 outbreak in Malaysia and Singapore linked to pig farming. In India, Kerala has borne the brunt, recording multiple outbreaks and dozens of deaths since the virus was first detected there in 2018.