By Dr. K.K. Jindal, Director and HOD Neurology, Max Hospital Shalimar Bagh, New Delhi
A surge of Guillain-Barré Syndrome (GBS) cases in India has raised alarm across the country. The outbreak—centered in Pune but spreading across Maharashtra, Andhra Pradesh, Assam, Tamil Nadu, and West Bengal—has killed 23 people, with more than 200 reported cases.
Understanding Guillain-Barré Syndrome
GBS is a severe neurological disorder in which the body’s immune system mistakenly attacks its own nerves, leading to weakness, paralysis, and potentially respiratory failure. Up to two-thirds of patients report a history of antecedent respiratory or gastrointestinal infection, with Campylobacter jejuni gastroenteritis being the most common trigger (25% of cases). Other triggers include cytomegalovirus, influenza, COVID-19, Zika virus, and various herpes viruses.
GBS occurs worldwide with an incidence of 1-2 cases per 100,000 annually. Clinical features include progressive, symmetrical weakness and absent deep tendon reflexes. Facial nerve palsies occur in more than 50% of cases, and 10-30% of patients develop respiratory weakness requiring ventilatory support.
Clinical Variants and Diagnosis
GBS presents in several variant forms:
- Acute Inflammatory Demyelinating Polyradiculoneuropathy (AIDP) – most common
- Acute Motor Axonal Neuropathy (AMAN)
- Acute Motor and Sensory Axonal Neuropathy (AMSAN)
- Miller Fisher Syndrome
- Bickerstaff Brainstem Encephalitis (BBE)
Diagnosis relies on clinical history, examination, nerve conduction studies, and cerebrospinal fluid analysis.
Treatment and Outcomes
Intravenous immunoglobulin therapy and plasmapheresis are the primary treatments. Approximately 80% of patients regain independent walking, and more than half recover completely within a year. However, severe motor impairment persists in over 10% of cases, with a mortality rate below 5%.
Water Contamination: The Hidden Culprit
The current Indian outbreak appears linked to water contamination. C. jejuni, a zoonotic pathogen implicated in the Pune outbreak, can enter the food chain through undercooked poultry, unpasteurized dairy, and contaminated water. In GBS, antibodies generated to fight C. jejuni infection mistakenly attack nerve gangliosides, leading to axonal damage, demyelination, and paralysis.
Investigations suggest that C. jejuni entered the water supply through sewage contamination, including infiltration into reverse osmosis systems. Similar scenarios have occurred globally—in 2023, Peru declared a health emergency after a C. jejuni-induced GBS outbreak, while Brazil has seen GBS spikes linked to Zika and chikungunya viruses. A study by the National Institute of Mental Health and Neurosciences found that between 2014-2019, nearly 80% of GBS cases in India were preceded by infections, most commonly chikungunya.
Public Health Implications
The Pune outbreak highlights India’s recurring water contamination issues. Waterborne gastroenteric infections impose a significant public health burden, causing widespread illness and economic costs. According to the World Bank, the annual global cost of treating foodborne illnesses exceeds $15 billion.
The Way Forward
A One Health approach—recognizing the interconnection between human, animal, and environmental health—is essential for addressing such outbreaks. Coordinated surveillance across multiple sectors, from agriculture to healthcare, is crucial.
Whole-genome sequencing (WGS) can precisely identify the C. jejuni strain responsible for an outbreak—an important capability, as not all strains cause GBS. While the World Health Organization strongly recommends WGS for foodborne outbreak investigations, its adoption in India remains limited due to high costs, infrastructure gaps in rural areas, and trained personnel shortages.
The current outbreak serves as a stark reminder that food and water safety are not merely regulatory concerns but are fundamental to public health security.