Difference between revisions of "Schistosoma"
Jump to navigation
Jump to search
(5 intermediate revisions by 4 users not shown) | |||
Line 1: | Line 1: | ||
+ | {{toplink | ||
+ | |backcolour = | ||
+ | |linkpage =Parasites | ||
+ | |linktext =PARASITES | ||
+ | |pagetype=Bugs | ||
+ | |sublink1=Trematodes | ||
+ | |subtext1=TREMATODES | ||
+ | }} | ||
+ | <br> | ||
+ | |||
== ''Schistosoma'' Species == | == ''Schistosoma'' Species == | ||
− | *The schistosomes are also known as "blood-flukes" | + | *The schistosomes are also known as "blood-flukes". |
− | *There are several important species producing serious human and animal disease in the tropics | + | *There are several important species producing serious human and animal disease in the tropics. |
− | *The pathology is mostly associated with the passage of eggs through the liver, urinary bladder or intestinal wall (depending on the predilection site of the fluke) | + | *The pathology is mostly associated with the passage of eggs through the liver, urinary bladder or intestinal wall (depending on the predilection site of the fluke). |
− | *As their common name suggests, the adults live in blood vessels | + | *As their common name suggests, the adults live in blood-vessels. |
− | *Unusually for a trematode, the sexes are separate | + | *Unusually for a trematode, the sexes are separate. |
− | *The smaller female lies enveloped by the male | + | *The smaller female lies enveloped by the male. |
− | *The eggs of most species have spikes to assist their passage through host tissue to get into faeces or urine (depending on predilection site) | + | *The eggs of most species have spikes to assist their passage through host tissue to get into faeces or urine (depending on predilection site). |
− | *The intermediate hosts are water snails | + | *The intermediate hosts are water snails. |
− | *On release, the cercariae swim in water and actively seek their final host, which they enter by skin penetration | + | *On release, the cercariae swim in water and actively seek their final host, which they enter by skin penetration - there is, therefore, no metacercaria stage. |
− | |||
− | |||
− | |||
− | |||
− | |||
− | |||
− | |||
− | |||
− | |||
− | |||
− | |||
− | |||
− | |||
− | |||
− | |||
− | |||
− | |||
− | |||
− | |||
− |
Revision as of 14:35, 22 December 2008
|
Schistosoma Species
- The schistosomes are also known as "blood-flukes".
- There are several important species producing serious human and animal disease in the tropics.
- The pathology is mostly associated with the passage of eggs through the liver, urinary bladder or intestinal wall (depending on the predilection site of the fluke).
- As their common name suggests, the adults live in blood-vessels.
- Unusually for a trematode, the sexes are separate.
- The smaller female lies enveloped by the male.
- The eggs of most species have spikes to assist their passage through host tissue to get into faeces or urine (depending on predilection site).
- The intermediate hosts are water snails.
- On release, the cercariae swim in water and actively seek their final host, which they enter by skin penetration - there is, therefore, no metacercaria stage.