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Hirudo medicinalis, or the European medicinal leech, is one of several species of leeches used as medicinal leeches. Other species of Hirudo sometimes also used as medicinal leeches include H. orientalis, H. troctina, and H. verbana. The Asian medicinal leech includes Hirudinaria manillensis, and the North American medicinal leech is ...
The best-known species, such as the medicinal leech, Hirudo medicinalis, are hematophagous, attaching themselves to a host with a sucker and feeding on blood, having first secreted the peptide hirudin to prevent the blood from clotting.
While H. medicinalis has long been used in hirudotherapy, and is approved by the US FDA as a prescription medical device, a 2007 study employing genetic analysis found that the species being marketed as H. medicinalis, possibly for decades, was the recently distinguished H. verbana.
Hirudo verbana is a species of leech. [ 2 ] Hirudo verbana has long been used as a medicinal leech under the species H. medicinalis , but has recently been recognized as a separate species distinct from the traditional or European medicinal leech of that name.
Hirudin is a naturally occurring peptide in the salivary glands of blood-sucking leeches (such as Hirudo medicinalis) that has a blood anticoagulant property. [2] This is essential for the leeches' habit of feeding on blood, since it keeps a host's blood flowing after the worm's initial puncture of the skin.
It's flu season right now, and the U.S. is in the midst of a wave that's straining hospitals.But not all influenza is the same. There are some notable differences between flu A and flu B strains.
European medicinal leech (Hirudo medicinalis) [68] [69] 800 BCE Europe, Asia: bloodletting, surgery, therapy, research, saliva, pets Captive-bred 7b Annelida: Cochineal (Dactylopius coccus) 700–500 BCE [44] Chile, Peru, Mexico: dye Very common in the wild 6b Other insects: Indian (Pavo cristatus) and green peafowl (P. muticus) 500 BCE ...
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