Several areas should be focused on to control this parasite
Cysts survive well in a cool, moist environment. Therefore, this type of environment must be regularly decontaminated by steam or chemical cleaning after thorough physical cleaning, followed by an adequate drying period. The best strategy is to not tolerate this type of environment in your home.
Animals can easily reinfect themselves by grooming fecal material that adhered to their coats, so thorough bathing is important.
Once exposed or re-exposed, an animal may pass cysts within five days, so it is important to prevent reintroduction of the parasite.
A commercial killed vaccine is available. It aids in preventing clinical disease and reducing cyst shedding, but does not totally prevent the infection. It can be used in puppies eight weeks of age and older, but requires a booster two to four weeks later to be effective.
Many Giardia cases are caused by drinking unfiltered municipal water (chlorination does not eliminate it) originating from contaminated lakes or rivers.
Daycare facilities also tend to have a high risk for infection.
There is scant direct evidence linking human infections with pets, nevertheless, caution should always be exercised in handling positive animals.