Nipah Resurfaces in Kerala District
Context
A 42-year-old woman in Malappuram district, Kerala, has tested positive for Nipah virus (NiV), prompting health authorities to initiate emergency surveillance and containment measures.
Relevance : GS2(Health)
Nipah Virus (NiV) – Key Facts
- Family: Paramyxoviridae
- Genus: Henipavirus
- Type: Zoonotic RNA virus
- Reservoir Host: Fruit bats (Pteropus species), also known as flying foxes
Transmission:
- Animal to human: Direct contact with infected bats, pigs, or consumption of fruits contaminated by bat saliva or urine.
- Human to human: Close contact with bodily fluids of infected individuals (e.g., during caregiving).
- Nosocomial transmission (hospital-acquired) has also been recorded.
Symptoms:
- Incubation period: 4 to 14 days (can extend up to 45 days in some cases).
- Initial signs: Fever, headache, drowsiness, nausea, sore throat.
- Severe progression: Encephalitis, disorientation, coma, seizures.
- Case Fatality Rate (CFR): 40% to 75% (extremely high compared to many viruses)
Geographical Spread:
- First outbreak: Malaysia and Singapore in 1998-99, primarily from infected pigs.
- India: Outbreaks in West Bengal (2001, 2007) and Kerala (2018, 2019, 2021, 2023, 2025).
- Also reported in Bangladesh (frequent outbreaks since 2001).
Prevention & Treatment:
- No specific antiviral treatment or vaccine
- Management: Supportive care, ICU monitoring for neurological symptoms.
- Preventive Measures:
- Avoid consumption of half-eaten fruits.
- Avoid contact with bats and pigs.
- Strengthen surveillance and contact tracing.
Research & Development:
- Monoclonal antibodies (e.g., m102.4) under trial stages.
- WHO identified NiV as a priority disease in its R&D Blueprint.
- India is collaborating with ICMR, CEPI, and global health bodies for vaccine development.
Disaster & Health Risk Potential:
- Classified as a Biosafety Level-4 (BSL-4) pathogen.
- Listed among WHO’s top 10 priority pathogens.
- High potential for localised epidemics and global health security threats.
