Health conditions

Giardia infection (giardiasis)

  • Giardia infection (giardiasis) is a form of gastroenteritis (gastro).
  • Symptoms including diarrhoea and stomach cramps usually appear between 7 and 10 days after infection.
  • Good hygiene can help stop it spreading.

Giardia infection (giardiasis) is a bowel (gut) infection caused by a tiny parasite called Giardia lamblia, also known as Giardia intestinalis. The parasite is a single-celled organism that can attach itself in large numbers to the wall of your bowel and interferes with your body’s natural absorption of nutrients.

In Western Australia, more than 700 cases of giardiasis are reported each year. More than half of all cases are in infants and children under 5 years of age. However, Giardia can infect anybody at any age.

How do you get Giardia infection?
Who is most likely to get it?
What are the signs and symptoms?
How do I know if I have been infected with Giardia?
How is it treated?
How can it be prevented?

Where to get help

Remember

  • Giardia infection (giardiasis) is a form of gastroenteritis (gastro).
  • Symptoms including diarrhoea and stomach cramps usually appear between 7 and 10 days after infection.
  • Good hygiene can help stop it spreading.

Last reviewed: 02-09-2024
Acknowledgements

Public Health


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