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
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
Esquema corporal de un Monogenea
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)
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
Digenea: Ciclos biologícos
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 ()
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
Digenea: cercarias
Tegumento
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)
Célula flamígera
Gastrodermis
Fasciola hepatica- Ciclo
Fasciola hepatica
Superficie tegumentaria de Fasciola hepatica
Fasciola hepatica
Fasciola hepatica- miracidio
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)
Lymnaea viatrix
Fasciola hepatica- huevo
No embrionado Embrionado Miracidio emergiendo
Fasciola hepatica: esporocisto
Fasciola hepatica: redias
Fasciola hepatica: cercaria
Fasciola hepatica: metacercaria
Fasciola hepatica: juvenil recientemente desenquistado
Schistosoma mansoni- Ciclo biológico
Schistosoma mansoni- adultos
Schistosoma - huevos
S. mansoni S. haematobium
Huevos de Schistosoma mansoni en el intestino
Schistosoma mansoni- miracidio
Huésped intermediario
Biomphalaria glabrata
Schistosoma mansoni- Cercaria
Cercarias de Schistosoma mansoni penetrando la piel
Schistosomula
Schistosomulas de S. mansoni en estadío pulmonar
Granuloma hepáticoFirst geno150219http://www