Health Care Provider Information on Giardiasis

on this page:
Required Disease Reporting
Parasite Information
Clinical Features
Laboratory Diagnosis
Treatment

Required Disease Reporting

Parasite Information

Clinical Features

  • The spectrum varies from asymptomatic carriage to severe diarrhea and malabsorption.
  • Acute giardiasis develops after an incubation period of 5 to 6 days and usually lasts 1 to 3 weeks.
  • Symptoms include diarrhea, abdominal pain, bloating, nausea, and vomiting.
  • In chronic giardiasis the symptoms are recurrent and malabsorption and debilitation may occur.
  • Giardiasis Clinical Features
    CDC.Attention: Non-MDH link

Laboratory Diagnosis

Treatment

  • Several prescription drugs are available to treat giardiasis.
  • Rapid loss of fluids because of diarrhea can be managed by fluid and electrolyte replacement.
  • Infection in healthy, immunocompetent persons is self-limited.
  • Nitazoxanide has been licensed by the Food and Drug Administration for the treatment of children with Giardia infections
  • Immunocompromised persons and those in poor health are at highest risk for severe illness.
  • In HIV infected patients, anti-retroviral therapy, which improves immune status, will also reduce oocyst excretion and decrease diarrhea associated with giardiasis.
  • Giardiasis Treatment
    CDC.Attention: Non-MDH link

Do you suspect that you have a foodborne illness? Visit reporting suspected foodborne illnesses.

Updated Tuesday, 16-Nov-2010 12:21:12 CST