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Slim
Joined: 05 Mar 2006
Posts: 6612
Location: New England (In the US of A)
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Nicky cigreen
Joined: 25 Jun 2007
Posts: 9887
Location: Devon, uk
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 Posted: Tue Mar 27, 18 11:41 pm Post subject: |
 
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| Slim wrote: |
| Nicky Colour it green wrote: |
| Jamanda wrote: |
| Well, I don't have a stream. I don't suppose the pond water is too evil - the main beasts it has are frogs and newts. I'll give it a go. |
it's the teeny beasties you need to be wary of - the parasites and bacteria - liver fluke is a parasite that lives on watersnails, IIRC |
I think it needs both snails and sheep to complete its lifecycle
www.scops.org.uk/internal-parasites/liver-fluke/lifecycle/ |
No, it doesn't need sheep to complete the cycle, as I understand it, just something to eat the fluke eggs, in you link the something is a sheep, but other animals can compkete the cycle, cattle, rabbuts, and humans.... if a human eats an egg, say by chewing grass, or eating infected raw food, they can develop fluke. In various Asian countries it is common to catch it by eating raw fish |
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Slim
Joined: 05 Mar 2006
Posts: 6612
Location: New England (In the US of A)
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| Posted: Wed Mar 28, 18 12:12 am Post subject: |
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| Nicky Colour it green wrote: |
| Slim wrote: |
| Nicky Colour it green wrote: |
| Jamanda wrote: |
| Well, I don't have a stream. I don't suppose the pond water is too evil - the main beasts it has are frogs and newts. I'll give it a go. |
it's the teeny beasties you need to be wary of - the parasites and bacteria - liver fluke is a parasite that lives on watersnails, IIRC |
I think it needs both snails and sheep to complete its lifecycle
www.scops.org.uk/internal-parasites/liver-fluke/lifecycle/ |
No, it doesn't need sheep to complete the cycle, as I understand it, just something to eat the fluke eggs, in you link the something is a sheep, but other animals can compkete the cycle, cattle, rabbuts, and humans.... if a human eats an egg, say by chewing grass, or eating infected raw food, they can develop fluke. In various Asian countries it is common to catch it by eating raw fish |
Ah yes, good clarification. I guess the question is if you don't have sheep, and are keeping your poo out of water, what else is eating the eggs to keep the life cycle going in that locality? (unless you're frequently getting an influx of migratory snails?) |
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Mistress Rose
Joined: 21 Jul 2011
Posts: 15998
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Nicky cigreen
Joined: 25 Jun 2007
Posts: 9887
Location: Devon, uk
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Mistress Rose
Joined: 21 Jul 2011
Posts: 15998
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gregotyn
Joined: 24 Jun 2010
Posts: 2201
Location: Llanfyllin area
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| Posted: Thu Mar 29, 18 2:53 pm Post subject: |
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Liver fluke definitely needs the sheep and the snail to do its life cycle. It is one of the few things that stick in my mind after 35 years since college, the snail is called limnia trunculata, useless gen to me now I don't have sheep!
Dry summers reduce the snail numbers significantly, as does generally dry ground, reeds present in a pasture indicate there is a fair bit of wetness. Cattle can also get liver fluke, but this doesn't show to the degree that it does in sheep due to the size of cattle, they can stand it. Not sure about horses. It is also interesting that only one particular stage,(third stage larval) is infective to sheep. So not only does this snail have to be there for infection to occur, there also has to be a passing sheep to pick up the infective stage for sheep, picking up the 1st or 2nd stage larvae does not cause the disease to take place. This is all memory so hazy!
I will find my old college notes and check, but the gist is right! |
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Mistress Rose
Joined: 21 Jul 2011
Posts: 15998
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Slim
Joined: 05 Mar 2006
Posts: 6612
Location: New England (In the US of A)
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oliveoyl
Joined: 18 Sep 2008
Posts: 425
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| Posted: Sat Apr 14, 18 9:20 pm Post subject: |
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Due to the aforementioned water issues, I grow land cress instead, it grows well in damp, shady conditions, it tastes very similar to watercress, I use as cut and come again leaves, it self seeds if you let it, so only need to buy one packet, and it's jolly hardy, I've been picking throughout the winter. Bolts if allowed to dry out.
https://www.marshalls-seeds.co.uk/cress-seeds-american-land-pid2330.html |
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- but they do seem to just appear in garden ponds... maybe they hitch a lift on visiting frogs?...who knows... there's probably a study about it somewhere 
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