Stomach Bug (Gastroenteritis)

Gastroenteritis, commonly referred to as a stomach bug, is an inflammation of the gastrointestinal tract, which includes the stomach and intestines. It is usually caused by a viral or bacterial infection.

Causes

  • Viral infections: Norovirus, rotavirus, and adenovirus are common causes of gastroenteritis.
  • Bacterial infections: Salmonella, Escherichia coli (E. coli), and Campylobacter are examples of bacteria that can cause gastroenteritis.
  • Food poisoning: Consuming contaminated or spoiled food can lead to gastroenteritis.
  • Contaminated water: Drinking water that is contaminated with viruses, bacteria, or parasites can also cause gastroenteritis.

Symptoms

  • Diarrhea: Frequent, loose, and watery stools are a common symptom of gastroenteritis.
  • Vomiting: Forceful expulsion of stomach contents is another symptom.
  • Abdominal cramps: Pain and discomfort in the abdominal area can occur.
  • Fever: A low-grade fever may be present in some cases.
  • Nausea: Feeling queasy or lightheaded can precede vomiting.

Diagnosis

Diagnosis of gastroenteritis is typically based on symptoms and medical history. In some cases, the following tests may be performed:

  • Stool test: To identify the presence of viruses, bacteria, or parasites in the stool.
  • Blood test: To check for signs of infection or dehydration.

Treatment

Treatment for gastroenteritis usually involves:

  • Fluid replacement: Drinking plenty of fluids to prevent dehydration.
  • Rest: Getting plenty of rest to help the body recover.
  • Dietary changes: Avoiding spicy, fatty, or heavy foods and opting for bland foods like crackers, toast, and plain rice.
  • Medications: Over-the-counter medications like anti-diarrheal or antihistamines may be prescribed to manage symptoms.

Prevention

To prevent gastroenteritis, it is essential to:

  • Practice good hygiene: Washing hands frequently with soap and water.
  • Avoid close contact with infected individuals.
  • Ensure proper food handling and preparation.
  • Avoid consuming contaminated or undercooked foods.

Article last updated on: 18th June 2025.
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