Giardiasis – clinical manifestations, etiologic factors, diagnostic approaches, therapeutic interventions, and nutritional guidelines
Felix Weber
2026-03-17
3 min. read
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*Giardia intestinalis* (formerly classified as *Gardia Lamblia*) is a unicellular parasitic organism belonging to the protozoan group capable of colonizing the human gastrointestinal tract. Through a specialized adhesive disc structure, it firmly attaches itself to the surface of small intestinal enterocytes—or, less commonly, to the biliary epithelium. The infection frequently remains asymptomatic for prolonged periods, meaning carriers remain unaware of the parasite’s presence within their digestive system. Only upon disease progression to an advanced stage do clinically significant symptoms emerge, markedly diminishing the patient’s overall quality of life.
What are the symptoms?
Acute infection occurs after 1 3 weeks and is characterized by a series of symptoms. These are vague. They are most commonly nausea, lack of appetite, yellowish stools, gas, slight fever, swelling, stomach aches, headaches, fatigue, rashes. Symptoms depend on the location and speed of the spread of the parasite and on the age and state of the immune system.
It's all about the cause
The cause of the disease is infection with Lambla cysts, which occurs by ingestion of contaminated water, food or dirty hands. It is mainly parasitic in the small intestine, but can also affect the pancreas, liver and gallbladder. In the intestine the cyst is resistant to environmental conditions. These cysts are characterized by high resistance to external environmental factors. in chlorinated water at 18°C they last up to 3 months, in river or lake water up to several months in wet water, about 3 weeks.
Lambliosis is a diagnosis
Giardia is diagnosed by microscopic examination (gastroscopy, gastrofibroscopy), serological (immunoenzymatic tests) and enterotests (stomach testing sampling for 8 10 days).
Lambliosis is a medical condition
All members of the family in which Lamblia has been detected should undergo treatment to prevent further infection, including antibiotics, diet and herbs.
Prevention of lambliosis
The best prevention is to take care of food hygiene, to wash our hands frequently, to cook and filter our water, and we are exposed to parasitic infections at all times of our lives, so we need to do a preventive disinfection of our bodies at least once every six months.
Lamblyosis is a diet
This pathogen mainly consists of sugars and fats. Therefore, a high amount of carbohydrates should be added to the diet (sweets, white pastries, pasta, white rice, potatoes). Antifungal and antifungal diets are well-established here. Milk, sugar, trans fats, sweetened drinks, herbal soluble coffee should be discarded.