What is the prognosis for a Giardia infection

In the case of giardiasis (Lambliasis; synonyms: diarrhea due to Giardia intestinalis; diarrhea due to Giardia lamblia; diarrhea due to lamblia intestinalis; infection due to Giardia lamblia; infection due to lamblia intestinalis; lambliasis; lamblia enteritis; lambliosis; lamblia dysentery; ICD-10-GM [Lambliasis]) is an infection of the small intestine caused by Giardia lamblia (Giardia duodenalis, Giardia intestinalis, Lamblia intestinalis) is triggered.

Giardia lamblia is a protozoon.

The disease is one of the parasitic zoonoses (Animal diseases).

Pathogen reservoir are, besides humans, also cattle and pets (dogs)

Occurrence: The infection occurs worldwide. It is most common in southern countries. Giardia lamblia is a possible causative agent of travelers' diarrhea. In Germany, the disease is often noticeable among people returning from vacation. The following are particularly affected:

  • Egypt
  • India
  • Italy
  • Spain
  • Tanzania
  • Thailand
  • Turkey
  • Tropics (tropical countries)

Seasonal fluctuations are not observed.

The transmission of the pathogen (route of infection) occurs fecal-orally (infections in which pathogens excreted with the stool (fecal) are ingested via the mouth (orally)), through direct contact, food or drinking water.

The incubation period (Time from infection to onset of the disease) is usually 7-10 days.

TheDuration of illnessis untreated for several months or even years; there is almost always a transition to chronic diarrhea.

Gender ratio: Men are affected more frequently than women. There is a clear difference in the 1-year-olds.

Frequency peak: An age peak is in childhood and adolescence. The highest age-specific incidences occurred in 1- to 4-year-old children. A second incidence peak is recorded in the age groups from 20 to 49 years of age.

The Incidence (Frequency of new illnesses) is approx. 5 illnesses per 100,000 inhabitants per year.

Course and prognosis: An infection with Giardia lamblia can be inconspicuous, but it can also lead to long-lasting, recurring diarrhea, accompanied by upper abdominal complaints with weight loss and meteorism (flatulence).

In Germany, according to the Infection Protection Act (IfSG), pathogens are detected in combination with an acute infection notifiable.
Sick people are not allowed to work in companies that work with food or drinking water.
Infected children who are younger than six years old are only allowed to visit community facilities again if further spread has been ruled out.

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