Cryptosporidiosis is
also known as
crypto, is a
parasitic disease
caused by
Cryptosporodium,
a protozoan
parasite of the
tribe
Apiocomplexa.

The symptoms manifests itself from two to ten days
after infection, with an average of seven days and
can last up to two weeks, or in some cases up to a
month. Other symptoms include nausea, vomiting
and dehydration. The individuals who are
asytomatiska (have no symptoms) are still
infectious and can therefore transmit the infection
to others. Even after symptoms have finally
subsided, an individual remains infectious for a few
weeks.
When Cryptosporidium spreads
beyond the intestine, especially
in patients with AIDS, it can
reach the lungs, middle ear,
pancreas and stomach.
The parasite can also infect the
biliary tract.
Cryptosporidiosis occurs
worldwide. It causes 50.8% of
the water-borne diseases
attributed to parasites

Cryptosporidium is highly resistant to klordesinfiktion, with enough
high concentrations and contact time, disabled Cryptosporidium by
chlorine dioxide and ozone treatment. The the required levels of
chlorine normally preclude the use of chlorine disinfection as a
reliable method to control Cryptosporidium in drinking water.
Ultraviolet (UV) light treatment at relatively low doses inactivate
Cryptosporidium. Water Research Foundation-paid research
discovered the original UV's ability to inactivate Cryptosporidium.
In year 2000 came the
first wave of
cryptosporidium in
Sweden's history. In
Ostersund they found
the parasite
Cryptosporidium in the
water and then they
had to boil their water
for about 3 months
before the problem was
fixt. The year 2011 it was
skellefteå who got to be
the other city in
swedens history to
experienced the
cryptosporidium
parasite, it took about
one-two months for
skellefteå to get their
water purified.