The beaver fever parasite

Giardia exists in forms that help it survive outside the body and spread through contaminated stool. It may enter drinking water, food, hands, or surfaces. After swallowing it, the organism can attach in the small intestine and disrupt normal digestion, contributing to diarrhoea, gas, cramps, bloating, nausea, and poor absorption of nutrients.

Exposure to a beaver is not required. Untreated water, person-to-person spread, and contaminated food or surfaces are possible routes. Symptoms alone cannot identify Giardia, since other causes of diarrhoea can feel similar.

Choose safe drinking water and avoid swallowing water in pools, lakes, or streams. Wash hands thoroughly with soap after toileting, changing nappies, or caring for someone with diarrhoea. Launder soiled items and clean bathroom surfaces. Keep swimming and food preparation for others on hold until diarrhoea has stopped and medical advice supports returning.

A clinician can decide whether stool testing is useful and whether prescription treatment is needed. Hydration is central while symptoms continue.

Arrange a medical review for diarrhoea that persists, recurs, or is associated with weight loss, dehydration, or a known exposure. Go to urgent care for confusion, collapse, severe weakness, blood in stool, severe pain, or repeated vomiting that stops you drinking. Seek advice promptly for an infant, frail older person, or person with a weakened immune system.

Ask whether your exposure warrants testing, how to rehydrate, whether close contacts need precautions, and which symptoms should prompt a return visit.