Giardia (Beaver Fever)


Giardia lamblia (aka Lamblia intestinalis)

Giardia lamblia is, a protozoa, that moves with the aid of five flagella and causes


Human giardiasis may involve diarrhea within 1 week of ingestion of the cyst, which is the environmental survival form and infective stage of giardia.

Illness lasts 1 to 2 weeks, but there are cases of chronic infections lasting months to years. Chronic cases are difficult to treat. Different individuals show various degrees of symptoms when infected with the same strain, and the symptoms of an individual may vary during the course of the disease. Ingestion of one more cysts may cause disease.

Giardia lamblia is frequently diagnosed by seeing the organism, either the trophozoite form or the cyst (the resting stage that is resistant to adverse environmental conditions with a microscope. A commercial fluorescent antibody kit is available to stain the organism.. An enzyme linked immunosorbant assay (ELISA) that detects excretory secretory products of the organism is also available. Giardiasis is frequently associated with the consuming contaminated water and food. Five outbreaks have been traced to food contamination by infected or infested food. Cool moist conditions favor the survival of the organism.

Giardiasis is more prevalent in children than in adults, possibly because many individuals seem to have a lasting immunity after infection. This organism is implicated in 25% of the cases of gastrointestinal disease and may be present asymptomatically. The overall incidence of infection in the United States is estimated at 2% of the population. This disease also afflicts many homosexual men, both HIV-positive and HIV-negative individuals. This is presumed to be due to sexual transmission. The disease is also common in child day care centres, especially when diapering is done.

Chronic infections lead to a malabsorption syndrome and severe weight loss. And are resistant to drug treatment. Flagyl is normally quite effective in terminating infections.

Giardia Beaver fever links

responsiblewildlifemanagement.org http://www.responsiblewildlifemanagement.org/beaver_fever.htm

outdoorplaces.com http://www.outdoorplaces.com/Features/Backcountry/giardia/