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Bats as Zoonotic Reservoirs: Nipah Virus with 74% Fatality, RNA Mutation Rate 10⁻³/site/year

Target:UPSC GS-IIIMPSCTeachingSSC GAPrelims HighMains High
25 Feb 2026
~2 min
Source: Indian Express
Key Data:74% fatality rate1998 first identified~18 kb genome size10⁻³ substitutions/site/yearPteropus medius
Bodies:Union Health Ministry
Practice MCQs from today's news ▸
What This Article Covers

1.Bats are identified as key natural reservoirs for high-fatality zoonotic viruses like Nipah (74% fatality in Bangladesh), Hendra, and coronaviruses due to long co-evolution and ecological traits.

2.Nipah virus is a single-stranded negative-sense RNA virus with a high mutation rate (~10⁻³ substitutions/site/year), driven by error-prone RdRp, posing unique challenges for containment and vaccine development.

3.Zoonotic spillover is exacerbated by ecological disruption (deforestation), agricultural intensification (pig farming), and human-wildlife interface (consumption of contaminated date palm sap), making this a critical topic for disaster management and environmental policy questions.

The Big Picture
Prelims · HighMains · High

Bats are critical reservoirs for deadly zoonotic viruses like Nipah due to unique ecological and evolutionary traits. Understanding RNA virus mutation rates (10⁻³ substitutions/site/year) and spillover pathways (e.g., contaminated date palm sap) is vital for public health strategy and biodiversity conservation, a key theme for GS Paper III.

Exam Lens

Quick Exam Facts From News

Nipah Fatality Rate (Bangladesh)74%
Nipah First Identified1998, Kampung Sungai Nipah, Malaysia
RNA Virus Mutation Rate~10⁻³ substitutions per site per year
Nipah Genome Size~18 kilobases (kb)
Indian Flying Fox (Reservoir)Pteropus medius

1-Minute Revision

  • ›Nipah Fatality Rate (Bangladesh): 74%
  • ›Nipah First Identified: 1998, Kampung Sungai Nipah, Malaysia
  • ›Target this Data: Nipah virus fatality rate in Bangladesh outbreaks (74%)
  • ›Target this Nodal Body: Union Health Ministry (monitors and clarifies outbreak status)
  • ›Target this Scientific Term: RNA-dependent RNA Polymerase (RdRp) - error-prone enzyme

Mastered this topic? Test your knowledge with a full MCQ quiz.

Practice exam-style questions, track your score, and strengthen your recall.

Q1Static LinkageEasy

Which Union Ministry is primarily responsible for monitoring and responding to outbreaks of diseases like Nipah virus in India?

Q2Statement-basedHard

Consider the following statements regarding Nipah virus:

1. It was first identified in 1998 during an outbreak among pig farmers in Malaysia.

2. It is a double-stranded DNA virus with a large genome.

3. The Indian flying fox (Pteropus medius) is identified as a natural reservoir for the virus.

Which of the statements given above is/are correct?

Q3Data-centricMedium

According to the article, what is the approximate mutation rate (substitutions per site per year) for most RNA viruses?

Q4Application/ImpactMedium

What is identified as a major ecological driver for the spillover of Nipah virus to humans in Bangladesh, as per the article?

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