Trematodes Generalidades

Presentación del tema: "Trematodes Generalidades"— Transcripción de la presentación:

1 Trematodes Generalidades
Platelmintos no segmentados Acelomados, parénquima Tubo digestivo incompleto Tegumento Sin aparato respiratorio ni circulatorio Sistema excretor protonefridial Hermafroditas excepto Schistosoma Fertilización cruzada

2 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

3 Esquema corporal de un Monogenea

4 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)

5 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

6 Digenea: Ciclos biologícos

7 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 ()

8 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

9 Digenea: cercarias

10 Tegumento

11 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)

12 Célula flamígera

13 Gastrodermis

14 Fasciola hepatica- Ciclo

15 Fasciola hepatica

16 Superficie tegumentaria de Fasciola hepatica

17 Fasciola hepatica

18 Fasciola hepatica- miracidio

19 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)

20 Lymnaea viatrix

21 Fasciola hepatica- huevo
No embrionado Embrionado Miracidio emergiendo

22 Fasciola hepatica: esporocisto

23 Fasciola hepatica: redias

24 Fasciola hepatica: cercaria

25 Fasciola hepatica: metacercaria

26 Fasciola hepatica: juvenil recientemente desenquistado

27 Schistosoma mansoni- Ciclo biológico

28 Schistosoma mansoni- adultos

29 Schistosoma - huevos S. mansoni S. haematobium

30 Huevos de Schistosoma mansoni en el intestino

31 Schistosoma mansoni- miracidio

32 Huésped intermediario
Biomphalaria glabrata

33 Schistosoma mansoni- Cercaria

34 Schistosomula

35 Schistosomulas de S. mansoni en estadío pulmonar

36 Granuloma hepático