WHICH PARASITES CAN HUMANS ACQUIRE?

Yes, humans are capable of contracting hookworms, tapeworms,
threadworms and campylobacteriosis. This is the most significant
reason to avoid allowing dogs (especially puppies) to like your
face and mouth - affectionately known as "puppy kisses". If a dog
has recently eaten feces or attempted to groom their hind quarters
and come into contact with this infectious material, there is a
chance the parasites will be passed directly into your mouth.
Children are especially venerable to infection because they tend to
enjoy playing in the dirt, where parasites such as hookworm larvae
lay dormant waiting for a new host. Young children may also put
dirty hands or toys in their mouth, further increasing the chance
for infectious material consumption.
Disease prevention

Pet feces can be catastrophic to the local water table,
contaminating nearby ponds, lakes, rivers and drinking water. When
feces is allowed to remain on the soil for long periods, rainstorms
will begin to dilute and break apart the feces and slowly spread
the bacteria on other contaminants into local water sources. If
your yard happens to hold water for extended periods of time, the
problem may be amplified.

To avoid potential infection, dog feces should be removed from the
yard every 1 - 7 days, depending on the size of the dog and number
of dogs in the household. Larger dogs will need more frequent
cleanup, as will households with more than 1 dog. A family with one
Pomeranian will have a much lower environmental impact than the
family with 2 Great Danes.