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Health library/Giardiasis

Infections

Giardiasis

Giardiasis is an intestinal parasite infection acquired by swallowing contaminated material. It can cause prolonged diarrhea and interfere with nutrition.

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What you may notice

Symptoms can overlap with other conditions and vary between people.

  • Diarrhea
  • Gas
  • Abdominal cramps
  • Greasy stools

Understanding care

Clinical care may include assessment of persistent symptoms, stool testing when appropriate and clinician-directed care. A qualified clinician decides which investigations and options fit the individual situation.

When to seek help

Seek prompt advice for persistent vomiting or diarrhea, especially in infants or vulnerable people. Very little urine, unusual drowsiness, bloody stool or inability to drink needs urgent assessment.

For severe breathing difficulty, collapse, suspected stroke, or another emergency, call local emergency services immediately. In India, call 112.

Read the medical sources

These sources support the educational article and offer more detail.

Educational reading · Updated 6 October 2026

Prepared from the linked sources. This summary has not had an independent clinician review. A qualified clinician can assess symptoms and explain which information applies to you.

A child and a caring grown-up reading a picture book together

LITTLE PEOPLE. BIG FEELINGS.

It’s okay to have
a lot of questions.

A doctor visit or an unfamiliar health word can feel scary. You can ask a trusted grown-up to help you understand, one small question at a time.

01

Say how you feel.

“I feel worried” is a good place to start.

02

Ask for simple words.

“Can you explain that in a way I understand?”

03

Bring someone you trust.

A caring adult can help you ask and listen.

For children and their grown-ups. This illustration explains a conversation, not a diagnosis. An adult should seek qualified care for a child who is unwell.

Giardiasis — First AID health library