Giardia

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Other names for Giardia

Giardiasis
Giardia infection
Giardia lamblia infection
Traveler’s diarrhea (Giardia-related)

Synopsis of Giardia

Giardia is a parasitic infection caused by Giardia lamblia (also known as Giardia intestinalis or Giardia duodenalis), a microscopic protozoan that infects the small intestine. It is a leading cause of parasitic gastrointestinal illness worldwide, especially in areas with poor water sanitation or after drinking contaminated water while camping or traveling.

Giardia is transmitted via the fecal-oral route, most commonly through:

  • Contaminated water (streams, lakes, or municipal supplies)

  • Contaminated food

  • Person-to-person contact, especially in daycare centers or shared households

Symptoms typically appear 1–3 weeks after exposure and may include:

  • Watery or greasy diarrhea

  • Bloating and gas

  • Abdominal cramps

  • Nausea

  • Fatigue

  • Weight loss

  • Foul-smelling stools

In some people, especially children or those with compromised digestion, symptoms may last for weeks or become chronic. Giardia can also cause malabsorption, leading to deficiencies in fat-soluble vitamins and lactase intolerance.

When to see a doctor:
If diarrhea lasts longer than a few days, is accompanied by dehydration, fever, or weight loss, or if you’ve recently traveled or consumed untreated water, consult a healthcare provider. Diagnosis is confirmed through stool testing.

Natural remedies for Giardia

Stay Hydrated: Replace fluids with electrolyte-rich drinks to avoid dehydration.

Low-Fat, Low-Fiber Diet: Helps ease symptoms by reducing fat malabsorption and bloating.

Probiotics: May help restore gut flora balance and reduce recovery time.

Avoid Sugar and Dairy: These can worsen symptoms by feeding the parasite or aggravating temporary lactose intolerance.

Good Hygiene: Prevent spread by washing hands thoroughly and disinfecting surfaces.