Many research studies have shown that in view of poor standards of hygiene, street food consumers are getting worm infestation, diarrhoea, vomiting and many other serious health issues. Street vending is a vital source of income for the urban poor, migrants, and displaced people. In India alone, there are estimated to be over 16.5 million street vendors and market traders. Street vendors constitute a massive, growing component of the global informal economy, with the market projected to reach $3.36 billion by 2026, growing at a 12.2% CAGR. They provide essential livelihoods for millions, particularly in developing nations, with high concentrations in Africa, Latin America, and India, where they often constitute 12–24% of urban employment.
The street food business in India for 2024-25 is experiencing a major transformation, shifting from an unorganized sector to a more structured, hygienic, and digital-first landscape. Driven by rapid urbanization, rising disposable incomes, and the post-pandemic focus on hygiene, the sector is seeing significant growth in food trucks, cloud kitchens, and organized street food hubs. The food services market in India, which encompasses dining out and ordering in, is currently valued at INR 550K Crore. The market is poised to grow at 10%–12% annually over the next seven years, reaching INR 900–1000K crore by 2030,” shared a report by Swiggy and Bain & Company.
There is a link between worm infestation and eating food on the streets however, hygiene is maintained. Eating in roadside Dabas also pose a health problem due to poor sanitary conditions and unhealthy habits of the food bearers of the Dhaba.
Other worms and fits
Research has suggested other parasites, like Onchocerca volvulus, may be linked to childhood seizure fits disorders like nodding syndrome through immune responses. Nodding syndrome is an acquired, incurable, and devastating paediatric epileptic encephalopathy affecting children aged 3–18 years in specific East African regions Uganda, South Sudan, Tanzania. It causes atonic seizures (rapid, repetitive head-nodding 5–20 times per minute), often triggered by eating certain foods or exposed to cold, resulting in cognitive decline, stunted growth, severe malnutrition, behavioral issues, and death. Onchocerca volvulus is a filarial (arthropod-borne) nematode (roundworm) that causes onchocerciasis (river blindness), and is the second-leading cause of blindness due to infection worldwide after trachoma. It is one of the 20 neglected tropical diseases listed by the World Health Organization, with elimination from certain countries expected by 2025. The onchocerca volvulus, is a parasitic worm responsible for onchocerciasis (river blindness), is strongly linked to causing epilepsy, including severe seizure disorders, in humans. This condition is known as Onchocerciasis-Associated Epilepsy (OAE). In the wake of extensive tourism and migration of people from different continents to different lands and countries the parasites transmission is widely happening in all sets of people.
Mechanism
Parasitic infections can generally cause neuroinflammation, affecting brain function. Larval cysts in the brain (neurocysticercosis) trigger inflammation, and as the parasites die or move, they disrupt brain tissue, causing seizures. Beyond seizures, it can cause severe headaches, confusion, memory problems, and muscle weakness. It is the leading cause of late-onset epilepsy in many developing countries and accounts for a significant portion of seizure cases worldwide. It is transmitted by ingesting microscopic tapeworm eggs shed in human feces, often due to poor sanitation or undercooked pork. When seizures occur, especially in individuals from or traveling to regions with poor sanitation, medical imaging such as CT or MRI is necessary to rule out neurocysticercosis. Neurocysticercosis is a severe, often preventable, parasitic infection of the central nervous system caused by larval cysts of the pork tapeworm (Taenia solium). It is emphasised that It occurs when humans ingest tapeworm eggs from contaminated food, water, or poor hygiene, leading to seizures, headaches, confusion, and increased intracranial pressure. It is a major cause of acquired epilepsy worldwide.
Symptoms of Neurocysticercosis
Symptoms vary based on the number, location, and developmental stage of the cysts in the brain. The most common symptom and a leading cause of acquired epilepsy in developing nations. Chronic or severe headache, often with increased intracranial pressure, is added to confusion, memory problems, difficulty with balance, and personality changes. Rarely, the other symptoms, such as vomiting, dizziness, and decreased visual acuity due to increased brain pressure or inflammation, are referred to as hydrocephalus. However, some individuals may not experience any symptoms. The parasite is dead and appears as a calcified scar, which can still trigger seizures.
Causes and Transmission
It is not caused by eating undercooked pork (which causes a different, intestinal form of tapeworm infection called taeniasis). Instead, it is transmitted via the fecal-oral route. By swallowing T. solium eggs, which migrate from the intestines to the brain, forming cysts (cysticercosis).
Treatment: Involves antiparasitic medications (albendazole or praziquantel) to kill the cysts, along with corticosteroids to reduce inflammation, and anti-seizure medications. Nevertheless, it is serious and potentially fatal; the prognosis for many is good with timely diagnosis and treatment. However, some cases may require surgical intervention for hydrocephalus or persistent, severe infections.
Preventive Measures
Thoroughly washing hands with soap and water after using the bathroom and before handling food, washing and peeling raw vegetables and fruits, avoiding undercooked pork, and drinking treated or bottled water, improved sewage disposal and management to prevent human feces from contaminating the environment and infecting pigs. The workers in the stalls of street food should be periodically trained on maintenance of self-hygiene and to follow healthy precautions while handling the food and serving to the customers. The food safety authorities should be vigilant in conducting raids to prevent adulteration of food. There is a need for continuous monitoring on safety of the street food with a Statutory Mechanism for Training and Support.
An important message to remember by the readers is that the large street food culture in our cities, including Pani Poori, is increasing day by day, and there is a hidden danger of infections and parasite transmission unless the consumers are cautious on the hygiene of the food materials they are consuming.
