Centre deploys national joint response team for Chandipura virus outbreak
2-minute summary
The Union Ministry of Health and Family Welfare has deployed a multidisciplinary national joint response team to Gujarat and Rajasthan to assist local health authorities in managing an outbreak of the Chandipura virus, which has claimed at least 22 child deaths during the monsoon season. The Chandipura virus is an RNA virus primarily transmitted by female phlebotomine sandflies, capable of causing Acute Encephalitis Syndrome (AES) and severe febrile illness, predominantly among children. The joint national team comprises experts from the National Centre for Disease Control (NCDC), the Indian Council of Medical Research (ICMR), and the Department of Animal Husbandry and Dairying. The team's immediate focus includes field epidemiological assessments, laboratory diagnostic coordination, clinical management guidance, and vector surveillance. Beyond sandflies, researchers are investigating the potential role of other arthropods like mosquitoes, ticks, and mites, as well as testing domestic livestock (cattle, buffaloes, and goats) to identify potential viral reservoirs and understand the transmission dynamics.
Why it's in the news
The Centre deployed a national joint response team to Gujarat and Rajasthan following an outbreak of Chandipura virus resulting in child fatalities. The team is conducting epidemiological studies, vector surveillance, and animal testing to control disease transmission.
Background and context
The Chandipura virus (CHPV) belongs to the Rhabdoviridae family and was first identified in 1965 in Chandipura village, Maharashtra. It predominantly affects children under 15 years of age due to their developing immune systems, often presenting as high-grade fever, vomiting, altered consciousness, and rapid progression to Acute Encephalitis Syndrome (AES) with high fatality rates. Transmitted mainly by the sandfly (Phlebotomus papatasi), the disease sees seasonal surges during the monsoon months when vector populations peak in warm, humid conditions. Outbreaks have historically been reported in states such as Gujarat, Maharashtra, and Andhra Pradesh. Because vector control and rapid clinical intervention are key to lowering mortality, multidisciplinary coordination combining human epidemiology, entomology, and animal health is essential.
Constitutional provisions
- Article 47 — Directs the State to regard the raising of the level of nutrition and standard of living of its people and the improvement of public health as among its primary duties.
- Seventh Schedule (List II - State List, Entry 6) — Public health and sanitation; hospitals and dispensaries fall primarily under the legislative domain of State governments.
Government schemes
- Integrated Disease Surveillance Programme (IDSP) — Provides early detection and response capabilities for disease outbreaks across states through a nationwide network.
- National Vector Borne Disease Control Programme (NVBDCP) — An umbrella program for prevention and control of vector-borne diseases including malaria, dengue, and kala-azar.
International organisations
- World Health Organization (WHO) — Provides technical guidelines on vector control, arbovirus surveillance, and global health emergency response.
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
Mains practice: Discuss the epidemiological and management challenges associated with seasonal viral outbreaks like the Chandipura virus in India. How can a 'One Health' strategy enhance preparedness?
The Chandipura virus outbreak highlights the growing vulnerability of rural populations to seasonal, vector-borne, and potentially zoonotic viral infections. Causing rapid-onset Acute Encephalitis Syndrome (AES) predominantly in children, the virus presents critical challenges to public health systems.
• Key Challenges in Managing Outbreaks:
1. Rapid Progression and High Mortality: Chandipura virus infections progress rapidly from mild febrile symptoms to neurological complications, leaving a narrow window for medical intervention.
2. Vector and Reservoir Complexity: While sandflies are known primary vectors, studying secondary vectors (mosquitoes, ticks) and potential animal reservoirs (cattle, goats) creates diagnostic and containment complexities.
3. Rural Health Infrastructure Gaps: Early reporting and critical care management for AES require equipped pediatric ICUs, which are often inadequate in remote rural settings.
4. Seasonal Recurrence: Monsoon conditions favor vector breeding, leading to sudden localized spikes that stretch state health capacities.
• Role of a 'One Health' Strategy:
1. Cross-Sectoral Collaboration: Integrates human health experts (NCDC), medical researchers (ICMR), and animal husbandry departments to simultaneously trace human, vector, and animal infection chains.
2. Joint Surveillance Networks: Enables integrated collection of human clinical data, vector population metrics, and livestock blood/milk samples for comprehensive risk mapping.
3. Unified Response and Preventive Action: Combines indoor residual spraying/gamaxine application for vector management with community-level pediatric health monitoring.
Conclusion:
Adopting a institutionalized 'One Health' approach, backed by strong primary healthcare infrastructure under PM-ABHIM and robust surveillance through IDSP, is essential to prevent child fatalities and contain emerging viral threats effectively.
Prelims practice questions
Q1. With reference to the Chandipura virus, consider the following statements: 1. It belongs to the Rhabdoviridae family and primarily affects children. 2. Sandflies are established primary vectors responsible for its transmission. 3. The virus typically leads to Acute Encephalitis Syndrome (AES). Which of the statements given above are correct?
- 1 and 2 only
- 2 and 3 only
- 1 and 3 only
- 1, 2 and 3
Answer: D. All three statements are correct. Chandipura virus is an RNA virus (Rhabdoviridae family) that predominantly affects children under 15, is primarily vector-borne via female sandflies, and causes severe neurological conditions culminating in Acute Encephalitis Syndrome (AES).
Q2. Which among the following central organizations were part of the multidisciplinary national joint response team sent to assist in the Chandipura virus outbreak? 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. The multidisciplinary joint response team deployed by the Union Ministry of Health and Family Welfare included specialists from the NCDC, ICMR, and the Department of Animal Husbandry and Dairying.
Q3. Which of the following constitutional provisions explicitly mandates the State to improve public health?
- Article 21
- Article 47
- Article 51A(g)
- Article 39A
Answer: B. Article 47 of the Directive Principles of State Policy (DPSP) lays down that the State shall regard the raising of the level of nutrition and standard of living of its people and the improvement of public health as among its primary duties.
Revision flashcards
- What is the primary insect vector established for transmitting the Chandipura virus? Female phlebotomine sandflies (Phlebotomus papatasi).
- Which severe neurological complication is most commonly associated with Chandipura virus in children? Acute Encephalitis Syndrome (AES).
- Which central agencies form the joint multidisciplinary team for the Chandipura virus response? National Centre for Disease Control (NCDC), Indian Council of Medical Research (ICMR), and Department of Animal Husbandry and Dairying.
- Why are domestic animals like cattle and goats tested during a Chandipura virus outbreak investigation? To check if domestic animals act as potential viral reservoirs supporting the transmission cycle.
- Which Constitutional Article under DPSPs outlines the duty of the State to improve public health? Article 47.