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Octomitus is a diplomonad with a broadly pyriform cell body tapered posteriorly, (10-15 µm), bearing six anterior flagella deflected backwards and two posterior trailing flagella. The two anterior nuclei are bean-shaped, they face up and adjoin each other in their anterior part. A large endosome is present in the anterior lobe of the nuclei. The two sets of flagella emerge on each side of the anterior part of the body. The two recurrent flagella, accompanied by a sheath of reticulum, traverse the cell, forming a central axis before emerging as trailing flagella. Two spikes are located at the posterior between the two trailing flagella. There is no cytostomal opening at the emergence of the trailing flagella in contrast to Spironucleus. Anaerobic, parasitic or endocommensal in the intestine of vertebrates such as amphibians, caecum of rodents, rumen. Octomitus intestinalis from mice with two posterior flagella (phase contrast)
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Octomitus is a diplomonad with a broadly pyriform cell body tapered posteriorly, (10-15 µm), bearing six anterior flagella deflected backwards and two posterior trailing flagella. The two anterior nuclei are bean-shaped, they face up and adjoin each other in their anterior part. A large endosome is present in the anterior lobe of the nuclei. The two sets of flagella emerge on each side of the anterior part of the body. The two recurrent flagella, accompanied by a sheath of reticulum, traverse the cell, forming a central axis before emerging as trailing flagella. Two spikes are located at the posterior between the two trailing flagella. There is no cytostomal opening at the emergence of the trailing flagella in contrast to Spironucleus. Anaerobic, parasitic or endocommensal in the intestine of vertebrates such as amphibians, caecum of rodents, rumen. Octomitus intestinalis from mice with two anterior nuclei, six antero-lateral flagella and two posterior flagella which traverse the cell axially (Giemsa staining)
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Giardia (gee-arr-dee-a), a diplomonad flagellate that is a common inhabitant of the human intestine. These are diplomonads, they have two nuclei (anterior), and two sets with four flagella each arising from the front end of the cell but extending to the side or posteriorly. Normally they clamp onto cells of the intestine, and heavy infections can lead to cells being ripped from the gut wall leading to bloody diarrhoea. Phase contrast.
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Giardia (gee-arr-dee-a), a diplomonad flagellate that is a common inhabitant of the human intestine. These are diplomonads, they have two nuclei (anterior), and two sets with four flagella each arising from the front end of the cell but extending to the side or posteriorly. Normally they clamp onto cells of the intestine, and heavy infections can lead to cells being ripped from the gut wall leading to bloody diarrhoea. Phase contrast.
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