Download - Trematodes Generalidades
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TrematodesGeneralidades
• Platelmintos no segmentados
• Acelomados, parénquima
• Tubo digestivo incompleto
• Tegumento
• Sin aparato respiratorio ni circulatorio
• Sistema excretor protonefridial
• Hermafroditas excepto Schistosoma
• Fertilización cruzada
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Monogenea
• Ectoparasitos: piel y escamas de peces, anfibios, reptiles y cetáceos.
• Opistaptor: órgano de adhesión con o sin ganchos
• Adultos, huevos y larva
• Hermafroditas
• Algunas especies vivíparas
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Esquema corporal de un Monogenea
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Digenea
• Parásitos
• Todos los grupos de vertebrados
• Ventosa oral y ventral
• Heteroxenos
• Ciclos complejos con varias generaciones larvarias que parasitan caracoles
• Adultos hermafroditas
• Parásitos de alto impacto sanitario (Schistosoma) y económico (Fasciola)
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Plan de organización corporal de digenea
Some common types of adult digenean worms, which are differential according to the appearance of their (e.g. suckers). The location of sexual organs is only approximate. HK, hooks at collar; IN, intestine; M, mouth; OS, oral sucker; OV, ovary; PH, pharynx; TE, testes; TR, tribocytic organ; VS, ventral sucker
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Digenea: Ciclos biologícos
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Adultos de clase Digenea
EX, excretory bladder; GP, genital pore; GÖ, genital bulbus; HK, hooks, spines of IN, intestine; INC, intestine (cut off on drawing); LC, ; OS, oral sucker; OV, ovary (); RS, TE, UT, uterus with eggs; VE, vas efferens of TE; VI, vitellary glands VS, ventral sucker ()
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Adultos de clase Digenea: localización intestinal
BE, bulbus of esophagus; BU, bulbus (apical); EX, excretory bladder; GP, genital pore; HK, hooks, spines of tegument; IN, intestine; LC, OS, oral sucker; OV, ovary RS, receptaculum seminis; UT, uterus with eggs; VI, vitellary glands (); VS, ventral sucker (); VSE, vesicula seminalis
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Digenea: cercarias
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Tegumento
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Desarrollo del tegumento en digenea
Diagrammatic representation of the development of the syncytial in digeneans (). A which is covered by ciliary plates and formed by the subtegumental layer. B Mother after detachment of ciliary plates. C Daughter sporocysts are covered by a syncytial tegument which is connected by bridges with the subtegumental layer. D the subtegumental layer becomes reduced, and later parenchymal cells will contact the syncytial tegument. CI, cilia; CM, circular muscles; CP, ciliary plate; F, foldings; FI, fibrous layer; G, germinal cells; LM, longitudinal muscles; N, nucleus; P, protruding subtegument; PA, parenchymal cell; RI, ridge; RS, remnants of the subtegument; ST, subtegumental layer; TG, tegument; TH, tegumental thorn (hook)
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Célula flamígera
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Gastrodermis
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Fasciola hepatica- Ciclo
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Fasciola hepatica
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Superficie tegumentaria de Fasciola hepatica
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Fasciola hepatica
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Fasciola hepatica- miracidio
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Huéspedes intermediarios de Fasciola hepatica en USA
. Pseudosuccinea columella (susceptible)B. Fossaria obrussa (refractario)C. Fossaria bulimoides (susceptible)D. Fossaria dalli (refractario)E. Fossaria parva (refractario)
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Lymnaea viatrix
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Fasciola hepatica- huevo
No embrionado Embrionado Miracidio emergiendo
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Fasciola hepatica: esporocisto
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Fasciola hepatica: redias
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Fasciola hepatica: cercaria
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Fasciola hepatica: metacercaria
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Fasciola hepatica: juvenil recientemente desenquistado
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Schistosoma mansoni- Ciclo biológico
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Schistosoma mansoni- adultos
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Schistosoma - huevos
S. mansoni S. haematobium
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Huevos de Schistosoma mansoni en el intestino
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Schistosoma mansoni- miracidio
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Huésped intermediario
Biomphalaria glabrata
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Schistosoma mansoni- Cercaria
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Cercarias de Schistosoma mansoni penetrando la piel
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Schistosomula
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Schistosomulas de S. mansoni en estadío pulmonar
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Granuloma hepáticoFirst geno150219http://www