C. MEDICINAL LEECHES
Leeches, which are used for the treatment of clinical symptoms in humans are called medicinal leeches and include Hirudo medicinalis, Hirudo verbana, Hirudo orientalis, Hirudo troctina, Hirudo michaelseni, Hirudinaria manillensi, Placobdella ornate and Macrobdella décora [3,4].

Credit: Ulrich Kutschera