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Intravascular detection of Giardia trophozoites in naturally infected mice - An electron microscopic study
Faculty
Science
Year:
2003
Type of Publication:
Article
Pages:
169-174
Authors:
El-Shewy, KA, Eid, RA
Journal:
PARASITE-JOURNAL DE LA SOCIETE FRANCAISE DE PARASITOLOGIE PRINCEPS EDITIONS
Volume:
10
Research Area:
Parasitology
ISSN
ISI:000184724900011
Keywords :
Giardia muris, giardiasis, intra-vascular, intra-lacteal, electron microscopy, naturally infected mice
Abstract:
During routine transmission electron microscopic (TEM) examination of mice naturally infected with Giardia muris, an intense infection with Giardia trophozoites was demonstrated within intestinal and renal tissues. Examination of randomly taken sections from these heavily infected tissues revealed marked deep affection with mixed pathology. Duodenal sections were found loaded with Giardia trophozoites in intimate contact with necrotic gut cells. Some of these trophozoites were detected within central lacteal of damaged villi and nearby blood vessels. Interestingly, and for the first time to be demonstrated, morphologically identical G. muris trophozoite was detected in a renal blood vessel. An intense cellular immune reaction was obviously demonstrated with remarkable interaction between giant macrophages and the trophozoites particulates. Involvement of deep tissues by Giardia trophozoites and their presence within vascular channels could open up questions about the possible invasive and disseminative behavior of G. muris, particularly in heavily and naturally infected hosts.
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