How is Giardiasis diagnosed?
How is Giardiasis diagnosed?
Giardiasis or infection with Giardia is diagnosed by performing a microscopic examination of a stool sample. The cysts are quite small and usually require a special floatation medium for detection, so they are not normally found on routine fecal examinations. Occasionally, the parasites may be seen on a direct smear of the feces. A blood test is also available for detection of antigens (cell proteins) of Giardia in the blood.
How is Giardiasis treated?
The typical drug used to kill Giardia is metronidazole, an antibiotic. It is normally given for 5-7 days to treat giardiasis. Other drugs are also used if diarrhea and dehydration occur. If metronidazole is not effective, other medications may be recommended.
How common is Giardiasis?
Giardiasis is found throughout the U.S. High rates of infection have been documented among children in day care centers, institutions, and on Native American reservations. Outbreaks occur most commonly from July through October. In some parts of the world, especially in developing countries, giardiasis is an endemic disease ( that is, the virus is constantly present with low levels of infection ). In these areas, many infected persons may have no signs of illness, even though they carry the parasite.
