Phylum sarcomastigophora motile unicellular eukaryotes (protozoa) “phylum sarcomastigophora” is an umbrella term for protozoans that move either by one or more flagella (“subphylum mastigophora or flagellata” – the flagellates) or by pseudopods (“subphylum sarcodina” – the amoeboids. Abstract ciliophora is the name for a phylum of protists commonly called the ciliates ciliates are the most complex of cells, having an elaborate cytoskeleton, cilia and two different kinds of nuclei. Microsporidian: microsporidian,, any parasitic fungus of the phylum microsporidia (kingdom fungi), found mainly in cells of the gut epithelium of insects and the skin and muscles of fish they also occur in annelids and some other invertebrates infection is characterized by enlargement of the affected tissue.
Protozoa are one-celled animals found worldwide in most habitats most species are free living, but all higher animals are infected with one or more species of protozoa infections range from asymptomatic to life threatening, depending on the species and strain of the parasite and the resistance of. These protists are parasites that feed off of their host and reproduce by the formation of spores sporozoans exhibit a type of alternation of generations in their life cycle, in which they alternate between sexual and asexual phases. These are nonmotile parasites with special organelles for penetrating host tissue apicomplexa these photosynthetic organisms can cause paralytic shellfish poisoning.
(a) apicomplexans are parasitic protists they have a characteristic apical complex that enables them to infect host cells (b) plasmodium, the causative agent of malaria, has a complex life cycle typical of apicomplexans. A parasite is an organism that lives on or in a host organism and gets its food from or at the expense of its host there are three main classes of parasites that can cause disease in humans: protozoa, helminths, and ectoparasites. Differentiate an intermediate host from a definitive host list the distinguishing characteristics of the two classes of parasitic helminths, and give an example of each. Parasitic protists belong to a range of deeply diverging eukaryotic taxa and are the cause of many important diseases in humans these organisms are capable of surviving in multiple vertebrate and arthropod host environments and, in some cases, as free-living organisms. Unfortunately, the genus, microspora, is a green alga, which would argue for a change in the phylum name the root name, microsporidia, is derived from zoological nomenclature when these organisms were considered to be protozoans in the class sporozoa.
Microsporidia are very frequently encountered obligatory intracellular protistan parasites that can infect both animals and some protists and are a consummate example of various aspects of the. This symbiosis can be mutualistic, where both partners benefit, or parasitic, where the protist uses its host as a source of food or shelter while providing no advantage to the other organism many protists are economically important and beneficial to humans, while others cause fatal diseases. Phylum under protozoa • large # genera / species • extracellular • typically in gi tract • direct life cycle • repro: asexual - binary fission • locomotion by cilia • morphologic feature - 2 nuclei macronucleus & micronucleus direct- parasite uses one host. G which the parasite lives and causes harm” • definitive host: “the organism in which the adult or sexually mature stage of the parasite lives” • intermediate host: “the organism in which the parasite lives during a period of its development only” • reservoir host : animals harboring the same species of parasites as man. The parasite was in direct contact with host cell cytoplasm in all stages of the cycle (merogony and sporogony) sporogony appears to divide by plasmotomy, giving rise to 4 uninucleate sporoblasts, which develop into uninucleate spores.
Introduction and classification of parasites is an very important and basic topic of parasitology parasitology is the branch of science which mainly deals about all the parasites and its infectious diseases. More recently, the protozoa have been classified together with several algal and fungal groups in the kingdom protista (protozoa representing the motile protists) irrespective of contemporary classification systems, most parasitological texts continue to use the name protozoa for historical reasons. The microsporidia constitute a group of spore -forming unicellular parasites they were once considered protozoans or protists , but are now known to be fungi , or a sister group to fungi loosely 1500 of the probably more than one million species are named now microsporidia are restricted to animal hosts , and all major groups of animals host microsporidia. These protists in turn contain symbiotic bacteria that break down cellulose, and some of these parabasalians move by means of thousands of symbiotic bacteria attached to their outer membrane and propelling the host forward.
Apicomplexa: the apicomplexa, also called apicomplexia, are a large phylum of parasitic protists they are spore-forming unicellular parasites (a commensal living within the body of its host) in the large intestine and cloaca of frogs and toads they are sometimes found in fish, reptiles, molluscs, and insects parasitic protozoa they. The first is called the archetista, and its parasitic forms are found in the phyla metamonada and microspora the second is the euprotista, containing phyla identified as the percolotista, parabasala, euglenista, opalotista, dinoflagellata, ciliophora, apicomplexa, rhizopoda, and acetospora.
These proved to be sporangia of a parasitic protist, here named parvilucifera infectans gen et sp nov its identity was examined by lm, em, and dna sequencing. Serve as a means of transfer from one host to another for parasitic species excystation is the escape of vegetative forms, called trophozoites, from the cyst it is usually triggered by a return to a favorable environment (eg, such as entry into a new host for parasitic species) phylum microspora phylum acetospora. Synopsis the subkingdom protozoa now includes over 65,000 named species, of which over half are fossil and ∼ 10,000 are parasitic among living species, this includes ∼ 250 parasitic and. Parasites a parasite is an organism that depends on another organism, known as a host, for food and shelter as an example, tapeworms live in the digestive system  of a large variety of animals.