Nipah Virus Outbreak and Health Response

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A new Nipah virus case has been reported in Kozhikode, Kerala.
Health authorities have started immediate contact tracing and quarantine measures.
Officials are maintaining heightened surveillance to prevent human-to-human transmission.

The Nipah virus (NiV) is a highly infectious zoonotic virus.
Researchers first identified the virus in 1998-99 in Kampung Sungai Nipah, Malaysia.
According to the World Health Organization (WHO), the virus spreads from animals to humans.
Fruit bats of the Pteropodidae family serve as the natural reservoir for the virus.
Pigs act as intermediate hosts before the virus reaches humans.
The virus belongs to the Henipavirus genus within the Paramyxoviridae family.
It can spread directly between humans, making it a serious public health threat that requires quick containment.

Nipah infection usually starts with flu-like signs such as fever and muscle pain.
Patients may also experience a sore throat and breathing trouble.
Severe cases can develop into acute encephalitis, which causes brain swelling.
This severe brain swelling leads to convulsions, confusion, coma, and sometimes death.
Some infected people show no symptoms at all, which makes tracking and stopping the spread much harder.

Experts classify NiV as a Biosafety Level-4 (BSL-4) pathogen.
Doctors can only test and handle this dangerous virus in high-security laboratories.
Medical teams confirm the infection using real-time polymerase chain reaction (RT-PCR) tests.
Other diagnostic tools include ELISA, serum neutralisation tests, and histopathology.

Kerala faces its highest Nipah risk from April to September every year.
Fruiting trees and increased bat activity during these months cause higher viral shedding.
Because fruit bats live widely in Kerala, stopping every single spillover event is very difficult.
The state government focuses mainly on constant surveillance, quick testing, and fast containment.

Scientists have not created any approved vaccine for humans or animals yet.
Doctors treat patients using strict isolation and intensive supportive care.
Medical teams in Kerala now use monoclonal antibodies and antiviral drugs such as Remdesivir.
These better treatments have reduced the death rate from 91% in 2018 down to around 33% by 2023-25.