parvum , is an intracellular
parasite. The infective, the oocyst is about half the size of a
red blood cell. The sporocysts are resistant to most chemical disinfectants,
but are susceptible to drying and the ultraviolet portion of sunlight
which s important in preventing infections.
cryptosporidiosis is characterized by severe watery diarrhea but
may, be asymptomatic. Pulmonary and tracheal cryptosporidiosis in
humans is associated with coughing and frequently a low-grade fever
and is accompanied by severe intestinal distress. One organism can
start an infection..
sp. could occur on any food
touched by a contaminated person. Known causes include child day
care centres that serve food and fertilizing salad vegetables with
manure. Large outbreaks happen with contaminated water supplies.
cryptosporidiosis is self-limiting for most healthy individuals,
with watery diarrhea lasting 2-4 days. In some outbreaks diarrhea
have lasted 1 to 4 weeks. To date, there is no known effective drug
for the treatment of cryptosporidiosis. Immunodeficient individuals,
especially AIDS patients, may have the disease for life, with the
severe watery diarrhea contributing to death. Invasion of the pulmonary
system may also be fatal.