The leech is a blood sucking worm, belonging
to the phylum annelida, class Hirudinea [2].
Leeches which attack man may be divided into
two classes: land leeches, which have powerful
jaws which can penetrate the skin so that they can
attach anywhere on the external surface of the
body, and aquatic leeches, which have weak jaws
and require soft tissues, such as the mucosa of
upper aerodigestive tractus, to feed on. Land
leeches are common in SouthEast Asia, the Pacific
Islands, the Indian subcontinent and South America.
Aquatic leeches have a worldwide distribution