Visit gastroenteritis is one of the most common causes of temporary illness in Quebec households. This inflammation of the digestive tract causes diarrhea, nausea, vomiting, and sometimes a slight fever, often lasting a few days. The vast majority of cases are viral in origin and resolve on their own. The real concern is not so much the infection itself as its consequences: fluid loss. Staying well-hydrated, recognizing warning signs, and knowing when to seek help make all the difference, especially for young children and older adults.
On this page
- What exactly is gastroenteritis?
- How is it spread (daycare, school, family)?
- Preventing the Spread of Infection at Home
- Oral rehydration: the key to recovery
- What to Eat and What to Avoid
- Recognizing the Signs of Dehydration
- When to See a Doctor, Call 811, or Go to the Emergency Room
- Myths and misconceptions
- Frequently asked questions
- Sources
What exactly is gastroenteritis?
Visit gastroenteritis refers to inflammation of the stomach and intestines that disrupts digestion. The body reacts by expelling the irritant more quickly, leading to diarrhea and vomiting. It is not a single disease, but a set of symptoms that can have several causes.
Mostly viral in origin
In Quebec, most cases of gastroenteritis are caused by viruses. Viruses circulate mainly from fall through spring, but you can catch them year-round. The main culprits are:
- Norovirus : Highly contagious; responsible for numerous outbreaks in daycare centers, schools, and residential facilities.
- Rotavirus : Common in young children; a vaccine is included in Quebec's immunization schedule.
- Other seasonal respiratory and gastrointestinal viruses.
To be distinguished from other digestive disorders
Viral gastroenteritis is sometimes confused with other conditions that appear similar but have different causes and treatments. Food poisoning, caused by contaminated food, often sets in more quickly after a meal. Traveler’s diarrhea, contracted while traveling, is caused by microbes encountered abroad. This article focuses on common viral gastroenteritis. If your symptoms follow a specific meal or a return from travel, those other conditions are more relevant to you.
How is it transmitted?
Visit contagion That’s the hallmark of gastroenteritis: it spreads quickly in settings where people live in close proximity to one another. Understanding how it spreads helps break the chain of transmission.
The Main Routes of Transmission
- Contact with contaminated hands, followed by contact with the mouth.
- Objects and surfaces touched by a sick person (door handles, toys, faucets).
- Food or water handled by someone who hasn't washed their hands.
- Droplets sprayed out during vomiting.
Environments at Risk of Outbreaks
Places where multiple people share spaces and objects are prone to outbreaks: daycare centers, schools, households, and nursing homes. A person can remain contagious for a few days after symptoms subside, which explains why the stomach flu «goes around» a household.
| Environment | Why Is This Going Viral? | A Helpful Gesture |
|---|---|---|
| Childcare | Young children, diapers, shared toys | Frequent handwashing, surface disinfection |
| School | Many social gatherings, shared dinners | Staying Home When You're Sick, Hand Hygiene |
| Family | Shared bathroom and dining area | Avoid sharing glasses and utensils |
| Senior Living Community | Community, the most vulnerable people | Improve hygiene, monitor hydration |
To remember
- Gastroenteritis is most often caused by a virus and clears up on its own within a few days.
- The main risk is dehydration, not the infection itself.
- It is spread primarily through contaminated hands, surfaces, and food.
- You can remain contagious for a few days after your symptoms go away.
- Daycare centers, schools, and residential facilities are prone to outbreaks.
- Handwashing remains the most effective preventive measure.
Preventing the Spread of Infection at Home
Visit prevention is based on simple, repeated actions. When someone in the household is sick, the goal is to limit the spread without turning the home into a sterile environment.
Handwashing: The Number One Step
- Wet your hands with lukewarm water.
- Lather for at least 20 seconds, making sure to wash between your fingers and under your nails.
- Rinse and dry with a clean or disposable towel.
- Wash your hands after using the restroom, after changing a diaper, and before preparing meals.
Alcohol-based hand sanitizer is a quick fix, but against certain gastrointestinal viruses, such as norovirus, soap and water are still more effective.
Surface Disinfection and Hygiene
- Clean and then disinfect frequently touched surfaces (door handles, faucets, toilet flush handles, light switches).
- Wash soiled clothing and bedding immediately, using hot water if the fabric allows it.
- Avoid sharing glasses, utensils, and napkins while you are sick.
- Handle and clean surfaces while wearing gloves, then wash your hands.
Back to daycare, school, or work
In general, it is recommended that you wait until your symptoms have gone away before returning to group activities, in order to reduce the risk of infecting others. Child care centers often have their own guidelines; if you have any questions, check with your child care center or a health care professional.
Not sure what to do for a sick loved one? Our professionals can guide you. Make an appointment At one of our service locations in Quebec, choose a online consultation without leaving home, or explore our solutions for companies in occupational health and safety.
Oral rehydration: the key
Visit oral rehydration is the cornerstone of recovery. Since there is no treatment to kill the virus itself, the key is to replace the fluids and electrolytes lost due to diarrhea and vomiting.
Oral Rehydration Solutions
Oral rehydration solutions (ORS), sold in pharmacies, contain a precise balance of water, salts, and sugar that helps the intestines absorb fluids. They are particularly useful for young children and the elderly. Here are a few guidelines:
- Offer small amounts frequently, rather than a large glass all at once.
- After vomiting, wait a short while, then start drinking again in small sips.
- Continue as long as the diarrhea lasts, to maintain balance.
Drinks to Choose and Drinks to Limit
| Recommended | Limit or avoid |
|---|---|
| Oral rehydration solutions (pharmacy) | Sugary soft drinks |
| Water, in small sips | Undiluted, very sweet fruit juices |
| Light Broths | Energy Drinks and Caffeinated Beverages |
| Lukewarm, unsweetened herbal teas | Alcohol |
Highly sugary drinks can make diarrhea worse. Homemade remedies are no substitute for over-the-counter oral rehydration solutions (ORS), which are formulated with the correct dosage; if you have any questions about which product to choose or how to prepare it, ask your pharmacist for advice.
What to Eat and What to Avoid
The’power supply Recovery from gastroenteritis should be gentle and gradual. You shouldn't «fast» the intestines for too long: as soon as you feel hungry again and liquids are passing through easily, you can start eating again.
Foods That Are Easy to Digest
- Simple carbohydrates: rice, plain pasta, toast, crackers.
- Sweet fruits such as bananas and applesauce.
- Broths and light soups.
- Small portions, spread out throughout the day.
Foods to Set Aside for a While
- Fatty, fried, or very spicy foods.
- Foods that are very sweet.
- Coffee and alcohol.
For breastfed infants, breastfeeding continues as usual. For any questions about a baby’s feeding or formula, it is best to consult a healthcare professional.
Recognizing Dehydration
Visit dehydration is the complication that requires close monitoring. It occurs when fluid loss exceeds fluid intake. The signs vary by age, and they can sometimes progress rapidly in young children and older adults.
Signs to Watch for by Age
| Group | Signs of dehydration to watch for |
|---|---|
| Infants and Young Children | Dry diapers, no tears, dry mouth, dark circles under the eyes, unusual drowsiness, irritability |
| Older children and adults | Intense thirst, dark and infrequent urination, fatigue, dizziness, dry mouth |
| Seniors | Confusion, weakness, infrequent urination, dry mouth, deterioration in overall health |
Extra caution is needed with young children and the elderly: their reserves are more fragile, and their condition can deteriorate quickly. If you notice these signs, don’t wait to seek advice.
When to See a Doctor or Call 811
Most cases of gastroenteritis can be treated at home. However, there are situations where it is necessary to seek the advice of a healthcare professional. If you are unsure what to do in Quebec, the service Info-Santé 811 is always available to help guide you.
Visit the website or call 811 if
- Signs of dehydration, especially in young children or the elderly.
- Vomiting that prevents you from keeping any liquids down.
- Diarrhea that lasts longer than a few days without improvement.
- High or persistent fever.
- Vulnerable individuals (chronic illness, weakened immune system, pregnancy).
Signs of an emergency—seek medical attention immediately
- Blood in the stool or in the vomit.
- Severe, persistent abdominal pain.
- Severe drowsiness, confusion, or difficulty waking the person.
- Signs of severe dehydration (prolonged absence of urine, extreme weakness).
If you have a medical emergency, call 911 or go to the emergency room. This article is not a substitute for a medical evaluation: only a healthcare professional can assess your specific situation. For quick advice without having to leave home, a online consultation could be a practical starting point.
Myths and misconceptions
«An antibiotic will cure my stomach flu.»
False. Gastroenteritis is most often caused by a virus, and antibiotics are ineffective against viruses. Taking them unnecessarily can even disrupt the gut flora and contribute to antibiotic resistance.
«You have to stop eating completely.»
Nuanced. Fluids are recommended when symptoms are at their worst, but you should resume eating light foods as soon as possible. Prolonged fasting is not helpful and can delay recovery.
«Soft drinks or sugary beverages are good for rehydration.»
False. If they are too sweet, they can make diarrhea worse. Oral rehydration solutions are more appropriate, especially for children and the elderly.
«Hand sanitizer replaces handwashing.»
Nuanced. Hand sanitizer helps in a pinch, but against certain digestive viruses, such as norovirus, soap and water are still more effective.
«Any case of diarrhea accompanied by vomiting is a stomach bug.»
False. Food poisoning or traveler's diarrhea may resemble a stomach bug without actually being one. The context (meals, travel) helps distinguish between them, and a healthcare professional can make the final determination.
Frequently asked questions
How long does gastroenteritis last?
Most cases improve within a few days. Fatigue may last a little longer. If your symptoms persist or worsen, talk to a healthcare professional.
How long are you contagious?
You can spread the virus as long as you have symptoms—and often for a few days after they go away. That’s why handwashing remains important even after you start to feel better.
Can I give my child medicine for diarrhea?
For children, anti-diarrhea medications are generally not recommended without medical advice. Rehydration remains the top priority. Ask your pharmacist or a healthcare professional for advice.
When should I bring my child back to daycare?
People generally wait until symptoms have subsided before returning to work, to limit the spread of infection. The daycare center may have specific guidelines; check with them for more information.
Can gastroenteritis be prevented with a vaccine?
There is no vaccine against all the viruses that cause these illnesses. A vaccine against rotavirus, which is common in young children, is included in Quebec’s immunization schedule. For the rest, hand hygiene remains the best form of protection.
Is this the same thing as food poisoning?
No. Food poisoning is caused by contaminated food and often appears shortly after a meal, whereas a viral stomach bug is spread from person to person. The circumstances surrounding the meal can help distinguish between the two, and a healthcare professional can determine the exact cause.
Sources
- Government of Quebec (Quebec.ca) — Gastroenteritis
- Info-Santé 811 — Government of Quebec
- Quebec Ministry of Health and Social Services (MSSS)
- Quebec National Institute of Public Health (INSPQ)
- Canadian Paediatric Society — Caring for Our Children
- Hygiene and Handwashing — Québec.ca
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