Stomach Flu – Symptoms and Treatment
Stomach flu (gastroenteritis) is an inflammation of the stomach and intestines, most commonly caused by viruses, leading to nausea, vomiting, and diarrhea.
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Stomach flu (gastroenteritis) is an inflammation of the stomach and intestines, most commonly caused by viruses, leading to nausea, vomiting, and diarrhea.
What is Stomach Flu?
Stomach flu, medically known as gastroenteritis, is an inflammation of the lining of the stomach and intestines. Despite its name, it is not related to influenza, which affects the respiratory tract. Gastroenteritis is one of the most common illnesses worldwide and can affect people of all ages.
Causes
In most cases, stomach flu is caused by viruses. Less commonly, bacteria or parasites are responsible.
- Viruses: Norovirus and rotavirus are the most frequent culprits. Rotavirus mainly affects infants and young children, while norovirus affects all age groups.
- Bacteria: Salmonella, Campylobacter, or Escherichia coli can be transmitted through contaminated food or water.
- Parasites: Organisms like Giardia lamblia are less common but possible, especially after traveling to regions with poor water quality.
- Transmission: The infection spreads mainly via contact with contaminated surfaces or hands (fecal-oral route), contaminated food, or droplet infection.
Symptoms
Symptoms usually begin suddenly and may vary in severity depending on the pathogen:
- Nausea and vomiting
- Diarrhea (watery, rarely bloody)
- Abdominal cramps and pain
- Loss of appetite
- Mild fever
- General feeling of illness and fatigue
- In more severe cases: signs of dehydration such as dizziness, dry mouth, or reduced urination
Diagnosis
Diagnosis is usually made based on typical symptoms and medical history. In most uncomplicated cases, no further tests are needed.
- Stool analysis: In severe or prolonged cases, a stool sample can be tested for bacteria, viruses, or parasites.
- Blood tests: If complications or severe dehydration are suspected, blood values such as electrolytes and inflammatory markers may be checked.
- Differential diagnosis: In atypical cases, other conditions such as inflammatory bowel disease may need to be ruled out.
Treatment
There is no specific cure for viral gastroenteritis. Treatment focuses on managing symptoms and, most importantly, replacing lost fluids and electrolytes.
General Measures
- Fluid intake: Drink plenty of fluids – water, herbal tea, or oral rehydration solutions available at pharmacies. Avoid alcohol and caffeine.
- Bland diet: Easy-to-digest foods such as toast, rice, bananas, or applesauce (BRAT diet).
- Rest: Physical rest is recommended during the acute phase.
Medication
- Antiemetics (for nausea and vomiting): e.g., metoclopramide – only under medical supervision.
- Antidiarrheals (for diarrhea): e.g., loperamide – for adults only, and not if fever or bloody stools are present.
- Antibiotics: Only prescribed for confirmed bacterial infections and under medical guidance.
When to See a Doctor
Medical attention should be sought in the following situations:
- Severe or persistent dehydration (no urine for hours, dry mouth, dizziness)
- Blood in stool or vomit
- High fever above 39 degrees Celsius
- Symptoms in infants, young children, elderly, or immunocompromised individuals
- Symptoms lasting more than 2 to 3 days
Prevention
Simple hygiene measures can significantly reduce the risk of infection:
- Regular and thorough handwashing with soap
- Proper food storage and adequate cooking temperatures
- Handle raw meat, eggs, and seafood carefully
- Drink only boiled or bottled water in regions with poor water quality
- Rotavirus vaccination for infants: Recommended by health authorities to protect against rotavirus
References
- World Health Organization (WHO): Diarrhoeal disease – Fact Sheet. www.who.int (2023)
- Centers for Disease Control and Prevention (CDC): Norovirus and Rotavirus – Overview. www.cdc.gov (2023)
- Guarino A. et al. – European Society for Paediatric Gastroenterology, Hepatology, and Nutrition (ESPGHAN): Evidence-based Guidelines for the Management of Acute Gastroenteritis in Children. Journal of Pediatric Gastroenterology and Nutrition (2014)
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Related search terms: Stomach Flu + Stomach Flu + Gastroenteritis + Stomach Bug