Transcript Trematodes Generalidades
Trematodes
Generalidades • • • • • • • •
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;
VS
, ventral sucker
OS
, oral sucker;
OV
, ovary;
PH
, pharynx;
TE
, testes;
TR
, tribocytic organ;
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; genital pore;
HK GP
, hooks, spines of , tegument;
IN
, intestine;
LC
,
OS
, oral sucker; seminis;
OV
, ovary
UT RS
, receptaculum , 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
Schistosomula
Schistosomulas de
S. mansoni
en estadío pulmonar
Granuloma hepático