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Giardia Varani
''Giardia'' ( or ) is a genus of Anaerobic organism, anaerobic flagellated protozoan Human parasite, parasites of the phylum Metamonada that colonise and reproduce in the small intestines of several vertebrates, causing the disease giardiasis. Their life cycle alternates between a swimming trophozoite and an infective, resistant Microbial cyst, cyst. ''Giardia'' were first described by the Netherlands, Dutch microscopist Antonie van Leeuwenhoek in 1681. The genus is named after French zoologist Alfred Mathieu Giard. Characteristics Like other diplomonads, ''Giardia'' have two cell nucleus, nuclei, each with four associated Flagellum, flagella, and were thought to lack both mitochondrion, mitochondria and Golgi apparatus, Golgi apparatuses. However, they are now known to possess a complex endomembrane system as well as mitochondrial remnants, called mitosomes, through mitochondrial reduction. The mitosomes are not used in Adenosine triphosphate, ATP synthesis the way mitochond ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Trophozoite
A trophozoite (G. ''trope'', nourishment + ''zoon'', animal) is the activated, feeding stage in the life cycle of certain protozoa such as malaria-causing ''Plasmodium falciparum'' and those of the ''Giardia'' group. (The complement of the trophozoite state is the thick-walled microbial cyst, cyst form). Life cycle stages Trophozoite and cyst stages are shown in the life cycle of ''Balantidium coli'' the causative agent of balantidiasis. In the apicomplexan life cycle the trophozoite undergoes schizogony (asexual reproduction) and develops into a Protozoal merogony, schizont which contains merozoites. The trophozoite life stage of ''Giardia lamblia, Giardia'' colonizes and proliferates in the small intestine. Trophozoites develop during the course of the infection into cysts which is the infectious life stage. References Parasitology {{parasite-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
