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Created page with '*tapeworms *have both intermediate and final hosts in their life cycle *main expression in the UK are the encysted forms that utilise the liver a…'
*tapeworms
*have both intermediate and final hosts in their life cycle
*main expression in the UK are the encysted forms that utilise the [[Liver - Anatomy & Physiology|liver]] and other organs in intermediate hosts
=====Taenia hydatigena=====
*the most important species
*final host
**dog
**alimentary tract
*intermediate host
**ruminant, horse, or pig
*life cycle is completed when the carnivore eats the tissues of the intermediate host containing the cysts
*the intermediate stage - Cysticercus tennuicollis
**fluid filled cysts on the surface of the [[Liver - Anatomy & Physiology|liver]] and in the [[Peritoneal cavity - Anatomy & Physiology|peritoneal cavity]]
NB: other Taenia species have muscle and brain as preferred sites in the intermediate hosts
Some can infect humans - zoonoses
=====Echinococcus granulosus=====
*Hydatid Disease
*final host
**dog, fox, and other canids
*intermediate host
**sheep most commonly affected
**ox and horses
NB: can also affect man - zoonosis
*'''hydatids''' - the cyst form
**develops from the ova
**occur in the lung and [[Liver - Anatomy & Physiology|liver]]
**cysts are usually multiple
**5-10cm in diameter
**contain a clear fluid with numerous scolices or '''"hydatid sand"'''
**the small calcified lesions that are sometimes present in the [[Liver - Anatomy & Physiology|liver]] of sheep may represent degenerate hydatid cysts
**can be very prevalent in some geographical areas[[Category:Hepatitis,_Parasitic]]
*have both intermediate and final hosts in their life cycle
*main expression in the UK are the encysted forms that utilise the [[Liver - Anatomy & Physiology|liver]] and other organs in intermediate hosts
=====Taenia hydatigena=====
*the most important species
*final host
**dog
**alimentary tract
*intermediate host
**ruminant, horse, or pig
*life cycle is completed when the carnivore eats the tissues of the intermediate host containing the cysts
*the intermediate stage - Cysticercus tennuicollis
**fluid filled cysts on the surface of the [[Liver - Anatomy & Physiology|liver]] and in the [[Peritoneal cavity - Anatomy & Physiology|peritoneal cavity]]
NB: other Taenia species have muscle and brain as preferred sites in the intermediate hosts
Some can infect humans - zoonoses
=====Echinococcus granulosus=====
*Hydatid Disease
*final host
**dog, fox, and other canids
*intermediate host
**sheep most commonly affected
**ox and horses
NB: can also affect man - zoonosis
*'''hydatids''' - the cyst form
**develops from the ova
**occur in the lung and [[Liver - Anatomy & Physiology|liver]]
**cysts are usually multiple
**5-10cm in diameter
**contain a clear fluid with numerous scolices or '''"hydatid sand"'''
**the small calcified lesions that are sometimes present in the [[Liver - Anatomy & Physiology|liver]] of sheep may represent degenerate hydatid cysts
**can be very prevalent in some geographical areas[[Category:Hepatitis,_Parasitic]]