Centre Deploys Joint Response Team to Tackle Chandipura Virus Outbreak
2-minute summary
The Union Ministry of Health and Family Welfare has deployed a national joint response team to Gujarat and Rajasthan to assist in controlling a fatal Chandipura virus outbreak, which has resulted in at least 22 child deaths during the monsoon season. The multidisciplinary team includes specialists from the National Centre for Disease Control (NCDC), the Indian Council of Medical Research (ICMR), and the Department of Animal Husbandry and Dairying. Chandipura virus causes Acute Encephalitis Syndrome (AES) and predominantly affects children under 15 years of age. While female phlebotomine sandflies are established primary vectors, scientists are investigating whether other arthropods—such as mosquitoes, ticks, and mites—are involved in transmission. Furthermore, animal surveillance has been expanded to test blood and milk samples from cattle, buffaloes, and goats to determine if domestic animals act as viral reservoirs. The deployed team will assist state authorities in epidemiological assessment, clinical management, laboratory diagnostic coordination, vector surveillance, and public health control interventions.
Why it's in the news
The Centre deployed a national joint response team comprising medical, epidemiological, vector, and veterinary experts to Gujarat and Rajasthan following a deadly Chandipura virus outbreak affecting children. The team aims to assist state governments in containment, clinical management, and investigating the complete transmission cycle of the virus.
Background and context
Chandipura virus (CHPV) belongs to the Rhabdoviridae family (genus Vesiculovirus). It was first isolated in 1965 in Chandipura village in Maharashtra, India. The virus primarily affects children under the age of 15 and manifests as Acute Encephalitis Syndrome (AES), characterized by high fever, altered sensorium, convulsions, and rapid clinical deterioration leading to death in severe cases within 24–48 hours of onset. Sandflies (specifically Phlebotomus papatasi) are established primary vectors, breeding in soil cracks, mud walls, and organic waste in rural and peri-urban areas. Historically, outbreaks have occurred in western and central Indian states, including Gujarat, Maharashtra, and Andhra Pradesh, typically coinciding with monsoon and post-monsoon seasons when vector density surges. There is currently no specific antiviral drug or human vaccine available for Chandipura virus, making early supportive clinical care and vector population control critical.
Constitutional provisions
- Article 47 — Directs the State to regard the raising of the level of nutrition, standard of living, and improvement of public health as among its primary duties.
- Seventh Schedule (List III - Entry 29) — Concurrent List entry covering prevention of the extension from one State to another of infectious or contagious diseases affecting humans, animals, or plants.
Committees and reports
- National Health Policy — Emphasizes cross-sectoral public health action, strengthening disease surveillance, early outbreak response, and vector-borne disease containment.
Government schemes
- National Vector Borne Disease Control Programme (NVBDCP) — Nodal agency for the prevention and control of vector-borne diseases in India through integrated vector management.
- Integrated Disease Surveillance Programme (IDSP) / PM-ABHIM — Strengthens disease surveillance networks, laboratory capacity, and rapid response units across states to detect and contain epidemic-prone diseases.
International organisations
- World Health Organization (WHO) — Monitors emerging global viral threats, sets technical guidelines for vector control, and enforces International Health Regulations (IHR) for infectious disease surveillance.
Previous UPSC questions on this theme
- Prelims GS-1 2021 — Consider the following statements : 1. Adenoviruses have single-stranded DNA genomes whereas retroviruses have double-stranded DNA genomes. 2. Common cold is sometime caused by an adenovirus whereas AIDS is caused by a retrovirus. 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
- Prelims GS-1 2017 — Consider the following statements: 1. In tropical regions, Zika virus disease is transmitted by the same mosquito that transmits dengue. 2. Sexual transmission of Zika virus disease is possible. 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
Mains practice: Examine the epidemiological challenges posed by emerging vector-borne viral infections like Chandipura virus in India. How does a 'One Health' approach help in mitigating such public health threats?
The resurgence of vector-borne arboviruses such as the Chandipura virus (CHPV)—a member of the Rhabdoviridae family causing Acute Encephalitis Syndrome (AES) primarily in children—underscores critical vulnerabilities in India's public health framework during peak monsoon seasons.
Key Epidemiological Challenges:
• High Case Fatality and Rapid Progression: CHPV causes rapid neurological deterioration, encephalitis, and high mortality within 24 to 48 hours of symptom onset, leaving a narrow window for clinical intervention.
• Diagnostic and Treatment Gaps: Absence of specific antiviral therapies and licensed vaccines, combined with limited diagnostic infrastructure at Primary Health Centres (PHCs), hampers early detection.
• Vector Proliferation and Environmental Drivers: Sandflies breed in rural mud-wall cracks and organic soil, thriving during monsoon conditions. Uncontrolled rural housing conditions exacerbate transmission.
• Unclear Reservoir Hosts: Emerging evidence suggests potential roles for secondary vectors (mosquitoes, ticks) and animal reservoirs (cattle, goats), complicating single-point intervention strategies.
Role of a 'One Health' Approach:
• Integrated Human-Animal Surveillance: Joint deployment of health, entomology, and veterinary experts (e.g., ICMR, NCDC, and Dept. of Animal Husbandry) enables cross-species monitoring of blood and milk samples to pinpoint animal reservoirs.
• Multi-Agency Vector Management: Aligning municipal sanitation, indoor residual chemical spraying (e.g., gamaxine powder), and agricultural vector control reduces vector densities effectively.
• Joint Research and Diagnostics: Inter-disciplinary collaboration enhances understanding of non-traditional vectors, viral mutation rates, and spillover mechanisms.
Conclusion:
Institutionalizing the 'One Health' framework under initiatives like the PM-ABHIM, alongside rural housing improvements and targeted vector surveillance, is vital for building resilient public health defenses against emerging zoonotic viral outbreaks.
Prelims practice questions
Q1. With reference to the Chandipura virus (CHPV), consider the following statements: 1. It is an RNA virus belonging to the Rhabdoviridae family. 2. Sandflies are established primary vectors for CHPV transmission. 3. It primarily affects older adults above 60 years of age. Which of the statements given above is/are correct?
- 1 and 2 only
- 2 and 3 only
- 1 and 3 only
- 1, 2 and 3
Answer: A. Statements 1 and 2 are correct. Chandipura virus is an RNA virus of the Rhabdoviridae family, and female sandflies are established vectors. Statement 3 is incorrect because CHPV predominantly affects children under 15 years of age, causing Acute Encephalitis Syndrome.
Q2. The Union Ministry of Health's joint response team deployed for disease outbreak investigations like the Chandipura virus brings together expertise from which of the following bodies? 1. National Centre for Disease Control (NCDC) 2. Indian Council of Medical Research (ICMR) 3. Department of Animal Husbandry and Dairying Select the correct answer using the code given below:
- 1 and 2 only
- 2 and 3 only
- 1 and 3 only
- 1, 2 and 3
Answer: D. All three bodies are involved in the multidisciplinary joint response team to assess clinical epidemiology, vector dynamics, virology, and potential domestic animal reservoirs under a 'One Health' approach.
Q3. Which of the following medical conditions is most commonly associated with severe Chandipura virus infection in children?
- Acute Hemorrhagic Fever
- Acute Encephalitis Syndrome (AES)
- Guillain-Barré Syndrome
- Pulmonary Renal Syndrome
Answer: B. Chandipura virus infection typically manifests as Acute Encephalitis Syndrome (AES), characterized by rapid onset of fever, altered sensorium, seizures, and inflammation of the brain.
Revision flashcards
- What type of virus is the Chandipura virus, and to which viral family does it belong? It is an RNA virus belonging to the Rhabdoviridae family (genus Vesiculovirus).
- Which insect is the primary established vector for the transmission of the Chandipura virus? Phlebotomine sandflies (specifically species such as Phlebotomus papatasi).
- Which age group is most vulnerable to severe outcomes from Chandipura virus infection? Children under 15 years of age are predominantly affected.
- What clinical syndrome is primarily caused by Chandipura virus in severe cases? Acute Encephalitis Syndrome (AES), characterized by high fever, brain inflammation, seizures, and rapid loss of consciousness.
- Why are blood and milk samples of cattle and domestic livestock tested during Chandipura virus outbreak investigations? To evaluate animal surveillance and determine whether domestic animals act as virus reservoirs that contribute to transmission cycles.