A fresh case of Nipah virus infection has been confirmed in Kozhikode district, Kerala. The patient is a 43-year-old man from Ramanattukara. District Collector M S Madhavikutty confirmed the news to PTI. According to the collector, 77 individuals have been identified in the contact list of the infected person. This includes 58 healthcare workers, 14 family members, and five friends and colleagues. Fortunately, none of the contacts have reported any symptoms so far.
What is Nipah Virus and Why Does It Keep Recurring?
Nipah is a zoonotic virus, meaning it originates in animals and then crosses over to humans. Fruit bats of the Pteropodidae family are the natural hosts of the Nipah virus. These bats are found in various parts of Asia and Australia. They carry the virus without showing any signs of illness. In most documented outbreaks, the virus first reaches humans through contaminated food, most commonly fresh date-palm sap. Harvesters collect sap by shaving the bark of date-palm trees, allowing the liquid to drip into a pot overnight. Fruit bats are attracted to the sweet sap and may lick it or drink from the collection pots. While feeding, bats can leave behind saliva or urine containing the virus, which can infect people who later consume the raw sap. This transmission route is especially well-documented in Bangladesh and West Bengal.
Symptoms of Nipah Virus Infection
Understanding the symptoms is crucial because the early signs can be deceptively ordinary. For some individuals, Nipah virus infection may be asymptomatic. However, most people develop a fever along with symptoms affecting the brain, such as headache or confusion, and symptoms affecting the lungs, such as difficulty breathing or cough. Typically, infected individuals are sick for 3 to 14 days with fever, headache, cough, sore throat, and difficulty breathing. While these symptoms may resemble a bad flu, what distinguishes Nipah is the rapid onset of neurological issues. The clinical spectrum ranges from asymptomatic infection to acute respiratory distress syndrome (ARDS) and fatal encephalitis. In severe cases, rapid neurologic decline and coma can occur within 24 to 48 hours. Seizures, disorientation, altered consciousness, and personality changes may follow the initial fever within days. The transition from feeling unwell to requiring intensive care can be frighteningly fast. The case fatality rate for Nipah is between 40 and 75 percent. Currently, there is no approved antiviral drug for Nipah virus infection.
Effective Preventive Measures
Avoiding raw date-palm sap is the single most important preventive measure for the general population in affected areas, especially during winter months. The virus is carried by fruit bats, which do not get sick but can spread Nipah through contaminated food or close contact. It is also important to avoid contact with wild fruit bats and fruits that show signs of bat feeding, such as partial bites, tooth marks, or bat droppings nearby. Washing fruits thoroughly before eating them is genuinely useful. For healthcare settings, strict adherence to infection prevention protocols when treating patients with unexplained fever and neurological symptoms is critical. Standard precautions apply, and where Nipah is suspected, droplet and contact precautions must be implemented before confirmation arrives.
