Guillain-Barré syndrome (GBS) is a rare autoimmune disorder where the immune system mistakenly attacks the peripheral nervous system, which controls muscle movement and sensation. This leads to muscle weakness, tingling, and, in severe cases, paralysis. Symptoms can develop rapidly over hours, days, or weeks, sometimes affecting breathing, heart rate, and blood pressure. While GBS can be life-threatening, most people recover, though some may experience lingering weakness or nerve damage. It has an annual incidence rate of 1.7 to 2 cases per 100,000 individuals. Symptoms of GBS Muscle weakness: Often starts in the feet and legs before spreading to the arms and upper body. In severe cases, it can affect breathing muscles. Sensation changes: Tingling, numbness, or a sensation of crawling insects (formication). Some people experience deep muscle pain, especially in the back or legs. Other symptoms:Difficulty with vision, swallowing, speaking, or chewing Loss of coordination and balance Abnormal heart rate and blood pressure fluctuations Bladder or digestive issues Types of GBS Acute Inflammatory Demyelinating Polyradiculoneuropathy (AIDP): The most common form, where the immune system damages the myelin sheath, slowing nerve signals. Acute Motor Axonal Neuropathy (AMAN) & Acute Motor-Sensory Axonal Neuropathy (AMSAN): These forms attack the nerve axons, leading to more severe and prolonged weakness. Miller Fisher Syndrome (MFS): Affects the cranial nerves, causing eye muscle paralysis, balance problems, and loss of reflexes. Causes & Risk Factors The exact cause of GBS is unknown, but it often follows a viral or bacterial infection. Common triggers include: Campylobacter jejuni is the most frequent pathogen linked to GBS (26-41%). The sources include cattle, chickens, dogs, and other animals. It spreads through the consumption of contaminated food, particularly raw or undercooked poultry, unpasteurized milk, or contaminated water. Respiratory or gastrointestinal infections Recent surgery or, in rare cases, vaccinations Viral infections like COVID-19, Zika, Epstein-Barr, or cytomegalovirus GBS can affect anyone but is more common in adults over 50. It is not contagious or inherited. Prevention Hands should be washed thoroughly and frequently with soap, especially after going to the bathroom or interacting with pets or farm animals. Fruits and vegetables should be washed carefully before consumption. Caution is advised when preparing raw meat, poultry, and seafood. Drinking treated or properly boiled water is recommended. Ensure that food is cooked properly. Avoid raw milk and products made from it; only consume pasteurized or boiled milk Diagnosis & Treatment Diagnosing GBS can be challenging due to its similarity to other neurological disorders. Doctors may use: Medical history & physical exam: Checking for rapid-onset weakness, loss of reflexes, and symmetrical symptoms. Nerve conduction tests (NCV): Measures how well nerves transmit signals. Cerebrospinal fluid (CSF) analysis: Increased protein levels with normal white blood cells can indicate GBS. MRI scans: Sometimes used to rule out other causes of weakness. Treatment Options There is no cure for GBS, but early treatment can reduce severity and speed up recovery. Common treatments include: Rehydration therapy is essential, which may include oral electrolytes or intravenous fluids depending on the severity of the condition. Antibiotics, such as erythromycin or ciprofloxacin, are used to treat Campylobacter infections. In cases where GBS has developed, immunotherapy is recommended, which involves plasma exchange to remove antibodies from the bloodstream. Intravenous immunoglobulin (IVIg): Provides healthy antibodies to help reduce the immune attack. Supportive care: Since GBS can cause paralysis, patients may need:Mechanical ventilation for breathing support Heart monitoring for irregular heart rates If muscle weakness persists after the acute phase of GBS, patients may require rehabilitation to rebuild muscle strength and mobility. Most people recover within months to years, but some may experience lasting weakness or nerve damage. Early medical intervention improves the chances of a full recovery. In early 2025, Pune, India, experienced a significant outbreak of Guillain-Barré Syndrome (GBS), with approximately 166 reported cases and five fatalities. Health officials identified the bacterium Campylobacter jejuni as the cause, transmitted through contaminated water from local wells. Investigations revealed that while water at the source was adequately chlorinated, samples from households showed zero chlorine levels, indicating possible contamination within the distribution system. Authorities have since directed the municipal water supply department to maintain a minimum chlorine level of 0.2 ppm in household water supplies to ensure public health safety. Sources: Emergence of Guillain-Barre Syndrome: a growing concern of Campylobacter jejuni diarrhea in India WHO