Featured Paper

Title: Nipah Virus Transmission from Bats to Humans Associated with Drinking Traditional Liquor Made from Date Palm Sap, Bangladesh, 2011–2014

Islam, M. S., Sazzad, H. M. S., Satter, S. M., Sultana, S., Hossain, M. J., Hasan, M., Rahman, M., Campbell, S., Cannon, D. L., Ströher, U., Daszak, P., Luby, S. P., & Gurley, E. S. (2016). Nipah virus transmission from bats to humans associated with drinking traditional liquor made from date palm sap, Bangladesh, 2011–2014. Emerging Infectious Diseases, 22(4), 664–670. https://doi.org/10.3201/eid2204.151747 

Main Focus:
This research explains how Nipah virus can spread from fruit bats to humans through raw or fermented date palm sap and how infected people may further transmit the virus to caregivers and family members.

Why This Research Is Important

• Nipah virus is one of the most dangerous emerging zoonotic diseases in Bangladesh.

• It has a high fatality rate, meaning many infected people may die from the disease.

• Bangladesh has experienced repeated Nipah outbreaks since 2001.

• The disease is strongly connected with winter-season consumption of raw date palm sap or fermented sap known as tari.

• Nipah is not only a human health issue; it is linked with wildlife, food habits, environment, and healthcare practices.

• This makes Nipah virus a perfect example of a One Health problem.

What the Research Found

• Fruit bats are the natural reservoir of Nipah virus.

• Bats may contaminate date palm sap with saliva, urine, or feces while feeding from open sap collection pots.

• People may become infected when they drink raw or fermented date palm sap without boiling.

• Some infected people can transmit the virus to others through close contact.

• Family caregivers and healthcare workers may be at risk if proper infection prevention measures are not followed.

• The study shows that Nipah transmission happens through a chain connecting bats, food, humans, and healthcare settings.

One Health Connection

Nipah virus shows why human health cannot be protected separately from animal and environmental health.

Human Health

• People become infected after drinking contaminated raw sap or through close contact with infected patients.

• Patients may suffer from fever, breathing problems, brain inflammation, and severe neurological symptoms.

• Early detection, isolation, and hospital infection control are essential.

Animal and Wildlife Health

• Fruit bats carry the virus naturally.

• Bats should not be killed because they are important for pollination, seed dispersal, and ecosystem balance.

• The goal should be reducing risky contact, not harming wildlife.

Environmental Health

• Open sap collection pots create a connection between bats and humans.

• Changes in land use, food systems, and human activities can increase human-wildlife interaction.

• Safer food collection and better environmental awareness can reduce disease risk.

Why Nipah Is a Priority for Bangladesh

• Bangladesh has a strong cultural practice of drinking fresh date palm sap during winter.

• Many rural communities depend on date palm sap collection for income.

• Raw sap is often collected overnight in open pots, which may allow bats to access it.

• People may not know that raw sap can carry Nipah virus.

• Human-to-human transmission can occur through close caregiving.

• A single case can become a family or community-level public health threat if awareness and prevention are weak.

Key Risk Factors

• Drinking raw date palm sap.

• Drinking fermented date palm sap or tari.

• Eating fruits partly eaten by bats.

• Close contact with a suspected Nipah patient.

• Caring for a sick person without protective measures.

• Poor infection prevention practices in healthcare settings.

• Lack of community awareness during the sap-harvesting season.

Prevention Messages for the Community

Message 1: Do not drink raw date palm sap

Raw date palm sap may look fresh and natural, but it can be contaminated by bats. Always boil sap before drinking.

Message 2: Avoid raw tari

Fermented date palm sap or tari may also carry risk if it is made from contaminated raw sap. Avoid drinking raw or unprotected tari.

Message 3: Cover sap collection pots

Sap collectors should use protective barriers such as bamboo skirts to prevent bats from accessing sap pots.

Message 4: Do not eat bat-bitten fruits

Avoid fruits that are partly eaten, scratched, or dropped under trees. Wash and peel fruits properly before eating.

Message 5: Seek medical help early

If someone has fever, breathing difficulty, confusion, unconsciousness, or neurological symptoms after drinking raw sap, seek medical care immediately.

Message 6: Protect caregivers

Family members caring for a suspected Nipah patient should avoid direct contact with saliva, respiratory secretions, urine, and other body fluids.

Message 7: Hospitals must stay alert

Healthcare workers should use infection prevention practices when treating suspected Nipah patients.

Message 8: Do not kill bats

Bats are important for the environment. Prevention should focus on safe food practices and reducing risky contact.

Simple Community Slogans

• “Boil sap, save lives.”

• “Raw date palm sap can be risky—drink it only after boiling.”

• “Protect the sap pot, protect the community.”

• “Do not blame bats; prevent risky contact.”

• “One Health means safe people, safe animals, safe environment.”

• “Nipah prevention starts before illness begins.”

• “Avoid raw sap today, prevent Nipah tomorrow.”

• “Care safely, protect your family.”

What Youth and Students Can Do

• Share awareness messages during winter and sap-harvesting season.

• Organize community education sessions in rural areas.

• Work with sap collectors to promote safe collection methods.

• Create posters, videos, and social media campaigns on Nipah prevention.

• Encourage people to boil sap before drinking.

• Promote respectful wildlife conservation messages.

• Support One Health collaboration among medical, veterinary, agriculture, environmental science, and public health students.

Policy and Public Health Recommendations

• Strengthen Nipah surveillance in high-risk areas.

• Promote safe date palm sap collection methods.

• Train sap collectors on bamboo skirt use and hygiene.

• Increase public awareness before and during winter.

• Improve hospital infection prevention and control.

• Support rapid diagnosis and reporting of suspected cases.

• Encourage collaboration among public health, veterinary, wildlife, food safety, and environmental sectors.

Final Message

Nipah virus is a warning that human health, animal health, and environmental health are deeply connected. In Bangladesh, the virus can move from fruit bats to humans through unsafe food practices and then spread among people through close contact. The solution is not fear or wildlife destruction. The solution is awareness, safe sap collection, early detection, hospital safety, and strong One Health collaboration.

Nipah prevention is possible when communities, researchers, healthcare workers, veterinarians, environmental experts, and young leaders work together.

Press by: Abu Sayed

Contact for the Press: mail@ohyab.org