My understanding is that Dientamoeba is indeed not uncommon in temperate
climates, probably because it doesn't usually take the usual fecal/cyst/oral
injestion route of infection. The argument by homology with a chicken
protist is that it is carried with developing pinworm eggs. The risk
factors for pinworm egg contamination remain high in temperate climates
(contaminated clothing and bedding, inhalation as well as ingestion), so
this is also consistent with this not truely being a tropical parasite.
>cigolott at nbnet.nb.ca wrote:
>><oobarrig.120.33176AD3 at pop.service.ohio-state.edu> -
>>oobarrig at pop.service.ohio-state.edu (Omar O. Barriga)
>>>>>>>>Does anyone out there have any information on this parasite :
>>>>>>>DIENTAMOEBA FRAGILIS trophozoites
>>>>> The troubling aspect of this is
>>where these folks picked up a tropical organism with no
>>signs of foreign contact.....
> I live in Adelaide Australia (definitely not tropical) and
>Dientamoeba fragilis is the second most common protozoan pathogen
>(behind Giardia) reported from faecal samples. It is regarded most
>micrbiologists here as a pathogen, especially if the patient has
>>>>Gerald McLaughlin, Ph.D.
Dept of Pathology and Laboratory Medicine
1120 South Drive, Fesler Hall 404
Indianapolis, IN 46202-5113
Ph: Office 317-274-7594; Lab 7315/7594/1264