Giardia lamblia

Giardia lamblia (synonymous with Lamblia intestinalis and Giardia duodenalis) is a flagellated protozoan parasite that colonises and reproduces in the small intestine, causing giardiasis. The giardia parasite attaches to the epithelium by a ventral adhesive disc, and reproduces via binary fission^[1]. Giardiasis does not spread via the bloodstream, nor does it spread to other parts of the gastro-intestinal tract, but remains confined to the lumen of the small intestine^[2]. Giardia trophozoites absorb their nutrients from the lumen of the small intestine, and are anaerobes.

Giardia lamblia: cell biology and microscopy of one of the most primitive eukaryotes.

Giardia, a protist, is providing new insights into the evolution
of the eukaryotic cell and of endoplasmic reticulum,
microtubules and mitochondria

by Dr. Bohdan J. Soltys
SUMMARY

Here you will learn some of the new and exciting things about the biology of protists, the most primitive eukaryotic, or non-bacterial, organisms. Recent discoveries concerning Giardia lamblia are emphasized and microscopic imaging of this organism and its subcellular organelles using both fluorescence and electron microscopy is a major highlight. There is also a tribute page in honor of Keith Porter, pioneer of electron microscopy, which features comparative microscopic imaging of mammalian cells, including human cells, which in contrast to Giardia represent the most highly evolved eukaryotic organisms.

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