The same result has followed from keeping together different varieties of the medicinal leech
. It may even be doubted whether the varieties of any one of our domestic plants or animals have so exactly the same strength, habits, and constitution, that the original proportions of a mixed stock could be kept up for half a dozen generations, if they were allowed to struggle together, like beings in a state of nature, and if the seed or young were not annually sorted.
And Dr Sawyer, who led an expedition into the heart of the Amazon jungle to find a rare species of medicinal leech
to establish Biopharm, says many more uses will be found for substances naturally produced by the creatures.
LEECH Used by doctors in the 18th and 19th centuries for blood letting, the medicinal leech
is now rare in the UK,surviving in only 20 lakes -four of which are on Anglesey.
The leech farm was created by former University of Wales, Swansea scientist Dr Roy Sawyer, who led an expedition into the Amazonian jungle to find rare medicinal leech
Although these blood-sucking parasites are no longer used as a cure-all, the medicinal leech
now plays a key role in UK burns units and reconstructive specialist hospitals.
HELP is on the way for the brown hare, red squirrel, grey partridge, great-crested newt, medicinal leech
, wild asparagus and fen orchid.
Miriam was merely expressing her displeasure at the medicinal leech
that was gorging merrily on the varicose veins in her right calf.
Roy Sawyer, the American zoologist who founded Biopharm, likes to call the medicinal leech
a "living pharmacy".
"When you do it the first time, you think, 'My God, leeches!'" Kalinicheva said."But after you go through it, you understand there is nothing to worry about." In Russia, a medicinal leech
costs less than $1, and a typical application requires three to seven of the ravenous little creatures.
Pan ddwedodd Emyr Humphreys (llun ar y dde) o Cyfoeth Naturiol Cymru wrtha i fod 'na gelod (Hirundo medicinalis; European medicinal leech
) yng Nghors Bodeilio ac y basa fo'n fodlon dangos i mi ble roedden nhw, roeddwn i'n gobeithio yn fy nghalon nad oedd o'n disgwyl i mi gerdded yn droednoeth i byllau yn y gors yn nhymor yr hydref!
Another big blood sucker is Macrobdella decora, the American medicinal leech
, replete with olive green back and gaudy orange belly.
According to the literature, in most cases the medicinal leech
Hirudo medicinalis was used.