A patient in Bangladesh has tragically died after contracting the rare and dangerous Nipah virus, according to a recent announcement from the World Health Organization (WHO). This incident marks the country's first fatality from the virus this year, raising concerns among health authorities in the region.
Details of the Fatal Case
The WHO confirmed on Friday that the patient, a woman aged between 40 and 50, first exhibited symptoms on January 21. These included fever and neurological issues, progressing to hypersalivation, disorientation, and convulsions. She was admitted to a hospital in Rajshahi on January 28, where doctors collected throat and blood samples, confirming the Nipah virus diagnosis.
Health officials reported that the woman had not travelled recently but had consumed date palm sap earlier in the month. This sap can become contaminated when fruit bats, which carry the virus, interact with it. All 35 individuals who had contact with the patient are currently under monitoring and have tested negative for the virus so far.
Understanding Nipah Virus
Nipah virus, often abbreviated as NiV, is a zoonotic pathogen that persists in fruit bats across South and Southeast Asia. It can spread to humans through contact with infected bodily fluids. First identified during a 1998 outbreak in Malaysia that killed over 100 pig farmers, the virus has a high fatality rate, estimated between 45% and 70%.
Symptoms and Risks
Initial symptoms, which can develop up to 21 days after infection, resemble the flu, including fevers, body aches, and vomiting. However, the virus can escalate to cause severe respiratory syndrome and encephalitis, or brain inflammation. There is currently no vaccine or cure available for Nipah virus, making prevention and containment critical.
Regional Outbreak and Response
This case follows a small outbreak of Nipah virus in India in late January, which sparked fears of a wider epidemic. Neighbouring India reported two cases in West Nepal last month, with health officials suspecting infection may have occurred through consuming date palm sap in the village of Ghughragachhi.
In response, countries such as Thailand, Nepal, Taiwan, and Pakistan have implemented Covid-style health checks at airports to help contain the spread. Bangladesh, which banned the sale of date palm sap in 2011 after a previous Nipah outbreak, regularly experiences small NiV outbreaks, particularly between December and April during the sap harvesting season.
Transmission and Prevention
The virus transmission is linked to the harvesting of date palm sap, where harvesters, known as gachis, collect the fluid in clay pots. Fruit bats are attracted to the sap and may contaminate it with urine or faeces, spreading the virus to humans who consume it raw or partially fermented.
Global Risk Assessment
Despite the high fatality rate, WHO has stressed that the risk of Nipah virus escalating into a pandemic is low. Dr Kaja Abbas, an associate professor at the London School of Hygiene and Tropical Medicine, explained to Metro that the basic reproduction number for Nipah virus is typically below one, indicating limited human-to-human transmission and a low likelihood of widespread spread.
UK Guidance for Travellers
For travellers, the UK Health Security Agency recommends several precautions to reduce the risk of infection:
- Practice good hand hygiene regularly.
- Avoid contact with bats and their environments, especially sick bats.
- Do not consume raw or partially fermented date palm sap; always boil date palm juice first.
- Wash all fruit thoroughly with clean water and peel before eating.
- Wear protective clothing and gloves when handling sick animals or during slaughter and culling procedures.
This incident underscores the ongoing threat of zoonotic diseases in certain regions and the importance of vigilant health monitoring and public awareness to prevent future outbreaks.
