Fasciolosis (Fasciola hepatica)  Fasciolosis is the disease
caused by liver fluke – fasciola hepatica linnaeus. It spreads
all over the world and it occurs mostly in domestic animals like
cattle, pigs, rabbits, horses and in wild animals. In case of
humans the parasite settles in the liver and the bile ducts. It
is estimated that there are about 50 mln people infected with
liver fluke. Regions the most affected are South and Latin
America. This fluke lays in the bile ducts about 6000 eggs a
day, which are later removed with faeces. In water, in the
temperature of 22 – 25˚C the first larvas (miracidium) hatch.
The larvas are active for a couple of hours and during that time
they get into an indirect host, that is a snail. After 3 weeks
from the penetration into the indirect host, the larva
transforms into – a sporocyst, which subsequently changes into
the first generation of Redia. In the following week another
generation of rediae and cercariae comes into being. Cercariae
get out of the snail and into water w