Nipah Puts Kerala Under Siege Again

Relevance: GS2 - Issues relating to the development and management of Social Sector/Services relating to Health

(Source: The Hindu, 09/16/2023)

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Why in the news?

• Recently, the Nipah infection count in Kozhikode district of Kerala has risen to six.
• Kerala finds itself grappling with the Nipah virus outbreak for the fourth time in five years.
• Nipah virus is considered a public health threat due to its potential for rapid transmission, high mortality rate and lack of specific treatment.
• According to the World Health Organization (WHO), Nipah virus has a mortality rate of 40% to 75%

What is Nipah Virus?

• Nipah is a zoonotic disease, which means it is transmitted to humans through infected animals or contaminated food.
• The virus belongs to a new genus termed Henipavirus (subfamily Paramyxovirinae).
• According to WHO, It can also be transmitted directly from person to person through close contact with an infected person.
• Currently, there are no vaccines for both humans and animals.

Origin and Discovery of Nipah Virus

• The first outbreaks of the Nipah virus among humans was reported from Malaysia (1998) and Singapore (1999).
• The virus takes its name from the village of Kampung Sungai Nipah in Malaysia where the person in whom the virus was first isolated died of the disease.
• In the Malaysian outbreak in 1999, a total of 265 people had been found infected, of whom 105 had died.
• In Bangladesh, people were infected when they ate food contaminated by bats, such as raw palm sap.
• In India, the transmission from one person to another has taken place mainly through respiratory droplets. The infection was first reported in Kozhikode district of Kerala in 2018.

Transmission of the Virus

• Nipah virus is primarily transmitted to humans from animals, especially fruit bats (Pteropus species), which are considered the natural reservoir hosts. Pigs can also act as intermediate hosts.
• Human-to-human transmission can also occur through close contact with respiratory secretions, saliva, urine, or other bodily fluids of infected individuals.
• Consumption of fruits contaminated with bat saliva or urine has also been implicated in some cases.

What are the symptoms?

• Nipah virus infection can lead to a wide range of symptoms, including fever, headache, dizziness, drowsiness, and vomiting.
• In severe cases, it can progress to encephalitis (swelling of the brain), characterized by symptoms such as seizures, altered consciousness, and coma.
• Respiratory symptoms like cough and breathing difficulties may also occur.

Impact of Nipah Virus Outbreak

• Geographic Spread: Nipah virus outbreaks have occurred in Southeast and South Asian countries, including Malaysia, Singapore, Bangladesh, and India, with the potential for the virus to re-emerge and spread to new areas.
• High Case Fatality Rates: Nipah virus outbreaks are characterized by high case fatality rates, often ranging from 40% to 70%, depending on the outbreak and healthcare infrastructure in the affected region. This places a significant burden on healthcare systems.
• Public Health Burden: Nipah outbreaks strain local healthcare systems, especially in resource-limited regions, due to the need for specialized care, including intensive care for severe cases.
  • Outbreaks create fear and panic in affected communities, requiring strict isolation and quarantine measures that disrupt daily life and cause anxiety.
• Global Concern: Nipah virus outbreaks are a global health concern due to their potential to spread to new regions and the absence of specific treatments or vaccines. International cooperation and information sharing are critical in managing and preventing the global spread of the virus.

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FAQs

MCQ

Question: Consider the following statements regarding Nipah Virus:

1. It is a zoonotic disease, which means it is transmitted to humans through infected animals or contaminated food.
2. The virus belongs to a new genus termed Henipavirus (subfamily Paramyxovirinae).

Which of the statements given above is/are correct?

(a) 1 only

(b) 2 only

(c) Both 1 and 2

(d) Neither 1 nor 2