Recurrent giardiasis: what to know

Giardiasis is an intestinal infection that can cause watery or greasy Diarrhoea, Bloating, cramps, nausea, tiredness, and weight loss. Symptoms returning may mean reinfection from contaminated water, food, hands, or close household contact; treatment may also need reassessment, or another condition may mimic the illness. A clinician may request stool testing and ask about travel, untreated water, household symptoms, swimming, and whether the full prescribed course was taken.

Drink fluids and consider oral rehydration advice if diarrhoea is frequent. Wash hands carefully after using the toilet and before preparing food, clean bathroom surfaces, avoid preparing food for others while unwell, and do not drink untreated water. Do not restart leftover medicine or share treatment. Bring a symptom timeline, travel or water exposure details, and a list of medicines to your GP Consultation; Antibiotic Treatment may be considered only when clinically appropriate.

Seek urgent help for severe dehydration, fainting, confusion, blood in stool, severe abdominal pain, or inability to keep fluids down. Arrange prompt review for persistent diarrhoea, reduced urination, worsening weakness, fever, or symptoms in a young child, older adult, pregnant person, or someone with a weakened immune system. Ongoing symptoms can affect nutrition even when pain is mild.

Ask whether repeat stool testing is needed, how to check household or water exposures, whether another diagnosis is possible, and which treatment plan and follow-up are appropriate.