Schistosomus refluxes twins

Re: Schistosomus refluxes twins

Hannah Wynne Richards — Fri, 23 Mar 2012 10:54:33 GMT

Julian If I was in farm practice in Swansea, I might (before they stopped giving it ) have tried to get a FRCVS by comparing foetal abnormalities on the Gower (clean air blown in from the Atlantic , and therefore clean soil ) and the Swansea valley (soil still contaminated as a result of copper/aluminium smelting in the 19th 1st 1/2 20th centuries

Wynne

Re: Schistosomus refluxes twins

james herriot lied — Fri, 23 Mar 2012 08:20:35 GMT

Another thought to the OP - did you see the schisto lamb yourself? Just mindful that some Schmallenberg limb deformities could resemble the retroflexed appearance of schistosomus. Less likely, of course, if it was in isolation.

Re: Schistosomus refluxes twins

Julian Earl — Thu, 22 Mar 2012 20:21:43 GMT

Late addition to the thread: back when I was a student, I was seeing practice at Wrexham and there was a schistosome calf born as part of a Siamese twin. What are the chances of that?

As for schistosomes generally, I suspect they are environmental not genetic. I saw a run of four or five SR calves in a one-year period up in Lancashire and all IIRC in farms around one small town (Bacup if anyone knows it). Most of them were alive when born as well.

Re: Schistosomus refluxes twins

Michael Woodhouse — Mon, 20 Feb 2012 23:28:53 GMT

[quote user="Hannah Wynne Richards"]

Sorry Micheal I said I CAN'T see it monovular You said seperate ova !!!!!!!!!!!! Aren't we saying the same thing ????????????

Wynne

[/quote]

Sorry - yes

Re: Schistosomus refluxes twins

Hannah Wynne Richards — Mon, 20 Feb 2012 15:14:46 GMT

Sorry Micheal I said I CAN'T see it monovular You said seperate ova !!!!!!!!!!!! Aren't we saying the same thing ????????????

Wynne

Re: Schistosomus refluxes twins

Michael Woodhouse — Mon, 20 Feb 2012 13:50:56 GMT

They seem perfectly normal in my limited experience of a handful.

Not sure I agree with Wynne, twins in sheep are usually separate ova and with the haploid nature of the germ cells the two could be quite different. I can't believe it is a single gene fault or we would see it more commonly (a lot of the domestic animals are bred from very small gene pools).

Re: Schistosomus refluxes twins

Hannah Wynne Richards — Mon, 20 Feb 2012 13:06:29 GMT

I don't know, but if hereditary and fromthe ram's side-future reproductive performance noworse than any other lamb born in that flock that year If inherited from the ewe's side-noworse than any sibling born in a different year I can't see monovular or, if hereditary,both would be schistosomes

Wynne