Ask any group returning from a first trip through Southeast Asia, Egypt or Latin America what went wrong, and a surprising proportion will name the same thing: two days lost to a stomach that would not settle. Travellers' diarrhoea is the most common illness in international travel by a wide margin, and it has a particular sting because it usually strikes in the first week, when the itinerary is at its busiest and the hotel is at its most expensive.
There is a persistent belief among Indian travellers that a lifetime of robust domestic eating confers immunity. It confers some — exposure to a wide range of organisms genuinely does build resistance, and Indian travellers often fare better than Western visitors in the same places. But immunity is specific to organisms you have met, and the strains in Hanoi, Cairo or Lima are not the strains you grew up with. The good news is that the precautions that matter are few, specific and entirely compatible with eating well. The advice to survive on packaged biscuits is both miserable and unnecessary.
What actually makes travellers ill
The usual culprits are bacteria, with various strains of E. coli leading the field, followed by others including Salmonella, Shigella and Campylobacter, plus viruses such as norovirus and parasites such as Giardia that tend to produce slower, longer-running symptoms. They reach you through contaminated water, food washed in contaminated water, food handled by unwashed hands, food left standing at warm temperatures long enough for bacteria to multiply, and undercooked meat, eggs and shellfish.
Notice what is not on that list: spice, unfamiliarity, and street food as a category. A busy street stall cooking to order over high heat in front of you is frequently safer than a hotel buffet where food has been sitting under a warming lamp for two hours. The variables that matter are temperature, time and handling — not whether the kitchen has walls. Once you are judging food on those three things rather than on how smart the premises look, you can eat adventurously with a much better record than the traveller who sticks to international hotel restaurants.
Water is the thing to get right first
In any destination where tap water is not reliably potable, the discipline is broader than not drinking from the tap. Use sealed bottled water and check that the seal is genuinely unbroken. Avoid ice unless you have reason to trust it, because ice is frozen tap water and freezing does not sterilise it. Brush your teeth with bottled or treated water. Keep your mouth closed in the shower, which sounds excessive until it is the only explanation for how you became ill. Be cautious with fresh juices diluted with water, and with salads and raw vegetables that were washed in it.
Hot drinks are generally safe because the water has been boiled, which makes tea and coffee reliable staples almost everywhere. Carbonated bottled drinks are safe and the fizz gives some assurance the seal is real. If you would rather not buy plastic bottles daily, a water bottle with a proper filter or a UV steriliser pen works well, and boiling for a rolling minute remains the most dependable method of all. Do not assume a country is safe because it is wealthy or unsafe because it is not — check the specific destination, and ask your hotel plainly.
How to choose where to eat, in four questions
First, is it busy, and busy with locals? High turnover means ingredients are used fast and food does not stand around. An empty restaurant at a peak hour in a crowded street is telling you something. Second, is it cooked hot and served immediately? Food that goes from a hot pan to your plate has had its bacterial load dealt with; food that has been sitting warm has had time to rebuild it. Third, can you see the cooking? Visible preparation is a genuine quality signal and is one of the underrated advantages of street stalls over closed kitchens.
Fourth, what is being handled raw? Salads, garnishes, chutneys and sauces that sit out, raw sprouts, unpasteurised dairy, and cut fruit prepared hours ago are the higher-risk items on any menu. The traveller's version of this is the old rule about peeling: fruit you peel yourself — bananas, oranges, mangoes — is reliably safe, while cut fruit from a platter carries the handling and washing history you did not witness. Shellfish, undercooked eggs and rare meat are worth being more careful about abroad than at home.
Eating vegetarian or Jain without losing the safety margin
For the many travellers from Gujarat who eat pure vegetarian or Jain, the risk profile shifts in a helpful direction — avoiding meat, eggs and shellfish removes several of the highest-risk categories at a stroke. It shifts the attention onto salads, raw garnishes, cut fruit, unpasteurised dairy and paneer that may have been sitting out, and onto cross-contamination in kitchens where the same board and knife handle everything.
The practical answers are the same ones that get you a properly Jain meal in the first place: be specific rather than general, carry a written explanation of your requirements in the local language, and favour freshly cooked hot dishes over assembled cold ones. Our guide to Jain and vegetarian-friendly destinations abroad covers which countries make this genuinely easy and which need planning, and a destination with a large Indian community is usually both easier to eat in and safer, because the food is cooked fresh in volume.
Hands, and the unglamorous habit that prevents most of it
Hand hygiene does more work than any dietary rule, and it is the one most travellers skip. Many transmissions are hand-to-mouth rather than anything to do with the food itself — you hold a handrail on a metro, you pay with cash, you eat a pastry with your fingers. Carry an alcohol-based hand sanitiser of at least sixty per cent alcohol and use it before every meal and snack, including street food eaten standing up. Wash with soap and water when you can, because sanitiser is less effective against some organisms and against visibly dirty hands.
Pack this properly rather than intending to buy it on arrival — a small bottle in a day bag, a refill in the suitcase. Our complete international travel packing checklist includes the small medical kit worth carrying, which for most destinations means oral rehydration salts, a basic anti-diarrhoeal, paracetamol and any personal prescriptions. Rehydration salts are the item people leave out and most regret leaving out.
If it happens anyway: what to do, and when to worry
Most episodes are self-limiting and resolve within a couple of days without any treatment beyond fluids. Rehydration is the priority and it is not optional — oral rehydration salts in safe water, taken steadily in small sips, do far more than any tablet. Plain, bland food as appetite returns, and rest. Anti-motility medicines such as loperamide can be useful to get through a flight or a long bus journey, but they treat the symptom rather than the cause and are not appropriate if there is high fever or blood, because slowing the gut in those circumstances can make matters worse.
See a doctor rather than waiting it out if there is blood in the stool, a high fever, severe abdominal pain, persistent vomiting that prevents you keeping fluids down, signs of significant dehydration such as very little urine or dizziness on standing, or if symptoms run beyond about three days. Be more cautious and seek help earlier for young children, older travellers, pregnant travellers and anyone with a chronic condition. Nothing here is medical advice, and a symptom that worries you is reason enough to get it looked at.
Insurance, medication and the paperwork nobody thinks about
A doctor's visit abroad is where an unused insurance policy suddenly becomes the most important thing you packed, and a hospital admission for dehydration in a high-cost country can run to a genuinely serious amount. Check that your policy's outpatient cover is not trivially small and that you know the emergency number and the cashless-treatment process before you need it — our travel insurance guide for Indian travellers sets out what to look for, and our walkthrough of how a travel insurance claim is filed and paid explains why keeping every receipt and prescription matters.
Two more pieces of preparation are worth an hour before you fly. Check whether your destination requires or recommends vaccinations, since some are entry conditions rather than suggestions — our yellow fever and travel vaccination guide for Indian travellers covers where certificates are checked at the border. And if you take regular medication, read our notes on carrying prescription medicines across borders, because an upset stomach that prevents you keeping tablets down is a different problem for someone on daily medication.
Frequently asked questions
Is street food genuinely safe? Often safer than a buffet, provided it is cooked to order over high heat, served immediately, and the stall is busy. Judge the cooking method and the turnover rather than the premises. The riskier street items are the cold ones — pre-cut fruit, sauces standing out, garnishes rinsed in tap water.
Should I take antibiotics with me as a precaution? Do not self-prescribe. Preventive antibiotics are not recommended for most travellers, and antibiotic misuse contributes to resistance. Some doctors prescribe a standby course for specific travellers going to specific places — that is a decision for your doctor, made in advance, with instructions on when it should be used.
Does alcohol in a drink make ice safe? No. This is a persistent myth. The alcohol concentration in a mixed drink is nowhere near enough to sterilise contaminated ice.
Are Indian travellers really less affected? Somewhat, and studies of travellers from high-exposure regions do suggest better tolerance — but immunity is specific to organisms already encountered, and a new region means new strains. The precautions still apply; they simply may be forgiving of the occasional lapse.
Eating well is most of why people travel, and none of this is an argument for avoiding the food. It is an argument for knowing which four or five things actually carry risk so you can ignore the rest and eat properly. When Explera Vacations plans a trip, the briefing we send covers water safety at your destination, the vegetarian and Jain situation town by town, and where the nearest reliable medical help is — the things that matter at nine in the evening in an unfamiliar city. Tell our Surat team where you are going through the contact page, or start with our tour packages from Surat and we will put the practical detail in writing before you leave.
